¦ Thyroid gland secretions (T3 and T4) are metabolic hormones
ú Thyroid hormones cause increased metabolism: CNS stimulation, increased vital signs, and increased GI motility (diarrhea)
HYPOTHYROIDISM | HYPERTHYROIDISM |
All body systems are DECREASED except WEIGHT and MENSTRUATION! | All body systems are INCREASED except WEIGHT and MENSTRUATION! |
ê decreased CNS: drowsiness, memory problems (forgetfulness) | é increased CNS: tremors, insomnia |
ê decreased v/s: hypotension, bradycardia, bradypnea, low body temp | é increased v/s: hypertension, tachycardia, tachypnea, fever |
ê decreased GI motility: constipation | é increased GI motility: diarrhea |
ê decreased appetite (anorexia) but with WEIGHT GAIN [low metabolism causes decreased burning of fats and carbs] ú This leads to increased serum cholesterol à atherosclerosis (hardening of arteries due to cholesterol deposits) ú Because of increased cholesterol, hypothyroid patients are prone to hypertension, myocardial infarction, CHF and stroke | é increased appetite (hyperphagia) but with WEIGHT LOSS [high metabolism causes increased burning of fats and carbs] |
ê decreased metabolism causes decreased perspiration à DRY SKIN and COLD INTOLERANCE | é increased metabolism causes increased perspiration à MOIST SKIN and HEAT INTOLERANCE |
é Menorrhagia (excessive bleeding during menstruation) | ê Amenorrhea (absence of menstruation) |
Pathognomic sign: EXOPHTHALMOS (bulging eyeballs) | |
¦ Nursing Management for hypothyroidism: ú Low calorie diet ú Warm environment | ¦ Nursing Management for hyperthyroidism: ú High calorie diet ú Cool environment |
NERVOUS SYSTEM
¦ CNS: brain and spinal cord
¦ PNS: 12 cranial nerves + 31 spinal nerves
ú 8 cervical nerves (C1 to C8)
ú 12 thoracic nerves (T1 to T12)
ú 5 lumbar nerves (L1 to L5)
ú 5 sacral nerves (S1 to S5)
ú 1 coccygeal nerve (Co)
¦ The spinal cord terminates at L1 to L2, therefore a LUMBAR TAP is performed at L3 ,L4 or L5
(no risk of paralysis from spinal cord damage)
(no risk of paralysis from spinal cord damage)
AUTONOMIC NERVOUS SYSTEM
Sympathetic Nervous System (SNS) | Parasympathetic Nervous System (PNS) |
¦ “Fight” or aggression response | ¦ “Flight” or withdrawal response |
¦ Also termed adrenergic or parasympatholytic response | ¦ Also termed cholinergic or sympatholytic response |
¦ The neurotransmitter for the SNS is norepinephrine | ¦ The neurotransmitter for the PNS is acetylcholine (Ach) |
All body activities are INCREASED except GIT! | All body activities are DECREASED except GIT! |
é increased blood flow to brain, heart and skeletal muscles: These are the most important organs during times of stress | ê normalized blood flow to vital organs |
é increased BP, increased heart rate: To maintain perfusion to vital organs | ê decreased BP, decreased heart rate |
é bronchodilation and increased RR: To increase oxygen intake | ê bronchoconstriction, decreased RR |
é urinary retention à FLUID VOLUME EXCESS Fluids are withheld by the body to maintain circulating volume | ê urinary frequency à FLUID VOLUME DEFICIT |
é pupillary dilation: MYDRIASIS: To increase environmental awareness during aggression | ê pupillary constriction: MIOSIS [this is the correct spelling, not meiosis J] |
ê decreased GIT activity: CONSTIPATION and DRY MOUTH: Blood flow is decreased in the GIT because it is the least important area in times of stress | é Increased GIT: DIARRHEA and INCREASED SALIVATION · |
DRUGS WITH SNS effects: | DRUGS WITH PNS effects: |
¦ Adrenergic/Parasympatholytic agents: ú Epinephrine [Adrenalin] ¦ Antipsychotics: ú Haloperidol [Haldol], Chlorpromazine [Thorazine], etc. § Side effect of Thorazine: Atopic Dermatitis (eczema) and foul-smelling odor [recall: patients in NCMH are smelly] § Side effect of all antipsychotics: Sx of PARKINSON’S DISEASE, therefore antipsychotics are given together with antiparkinson drugs ¦ Anti-parkinsonians: ú Cogentin, Artane, etc. ¦ Pre-operative drug: ú Atropine Sulfate (AtSO4) – given before surgery to decrease salivary and mucus secretions · | ¦ Anti-hypertensives: ú Methyldopa – for pregnancy induced hpn (PIH) ú b-blockers (-olol): § Propranolol [Inderal], atenolol, metoprolol ú ACE inhibitors (-pril): § Enalapril, Ramipril, Lisinopril, Benazepril, Captopril § Side effect of ACE inhibitors: AGRANULOCYTOSIS and NEUTROPENIA (blood dyscracias… always asked in board!) ú Calcium channel blockers (Calcium antagonists) § Nifedipine [Procardia], Verapamil [Isoptim], Dialtiazem [Cardizem] ú NURSING ALERT: Anti-hypertensives are not given to patients with CHF or cardiogenic shock (Drug will cause a further decrease in heart rate à Death) ¦ Rx for Myasthenia Gravis: ú Pyridostigmine [Mestinon] ú Neostigmine [Prostigmin] |
NEURONS
3 characteristics of neurons:
1. Excitability – Neurons are affected by changes in the environment
2. Conductivity – Neurons transmit wave of excitations
3. Permanent cells – Once neurons are destroyed, they are not capable of regeneration.
2 3 types of cells according to regenerative capacity: | |
Labile capable of regeneration | epidermis (skin), gastrointestinal tract (GIT), genito-urinary tract (GUT), respiratory tract (stab wounds to the lungs are survivable) |
Stable once destroyed, capable of regeneration but with limited survival time period | kidneys, liver, pancreas, salivary glands |
Permanent once destroyed, not capable of regeneration | heart, neurons, osteocytes, retinal cells |
NEUROGLIA
¦ Function: support and protection of neurons
¦ Clinical significance: Majority of brain tumors arise from neuroglia
¦ Types:
ú Astrocytes
ú Microglia
ú Oligodendrocytes
ú Ependymal cells
¦ Note: Astrocytoma is the #1 type of brain tumor
ASTROCYTES – maintain the integrity of the BLOOD-BRAIN BARRIER
2 Toxic substances that can cross the BLOOD-BRAIN BARRIER: 1. Ammonia 2. Bilirubin 3. Carbon monoxide and Lead 4. Ketones |
AMMONIA | |
¦ Ammonia is a by-product of protein metabolism ¦ Ammonia is a toxic substance metabolized by the liver into a non-toxic substance (urea), which is then excreted by the kidneys ¦ Increase in serum ammonia can cause HEPATIC ENCEPHALOPATHY (Liver cirrhosis) ¦ Normal liver is scarlet brown; liver with cirrhosis is covered by fat deposits (“fatty liver”) ¦ The primary cause of hepatic encephalopathy is MALNUTRITION ¦ The major cause of hepatic encephalopathy is ALCOHOLISM ú Alcoholism causes Thiamine (B1) deficiency (Alcoholic beriberi) ¦ Ammonia is a cerebral toxin. ¦ Early sign of Hepatic Encephalopathy: ú ASTERIXIS – flapping hand tremors. This is the EARLIEST SIGN OF HEPATIC ENCEPHALOPATHY. ¦ Late Signs of Hepatic Encephalopathy: ú Headache ú Restlessness ú Fetor hepaticus (ammonia-like breath) ú Decreased level of consciousness à HEPATIC COMA § Note: The primary Nursing Intervention in hepatic coma is AIRWAY [Assist in mechanical ventilation] | |
BILIRUBIN | |
¦ Review: ú Bilirubin – yellow pigment ú Biliverdin – green pigment ú Hemosiderin – golden brown pigment ú Hemoglobin – red pigment ú Melanin – black pigment ¦ Icteric skin and sclerae is termed Jaundice = a sign of HEPATITIS ú Note: Icteric skin with normal sclerae is termed Carotinemia = a sign of PITUITARY GLAND TUMOR, not hepatitis ¦ Kernicterus (Hyperbilirubinemia) can lead to irreversible brain damage | |
CARBON MONOXIDE (CO) AND LEAD (Pb) | |
¦ CO and Pb can cause PARKINSON’S DISEASE and SEIZURE ú Note: The initial sign of Parkinson’s disease: PILL-ROLLING TREMORS ¦ The antidote for Pb poisoning is Calcium EDTA ¦ The antidote for CO poisoning is Hyperbaric oxygenation (100% oxygen) | |
KETONES | |
¦ Ketones are by-products of fat metabolism ¦ Ketones are CNS depressants ¦ Increased ketones can lead to diabetic ketoacidosis (DKA) seen in Type I diabetes mellitus (DM). ¦ DKA is due to increased fat metabolism: |
DIABETES MELLITUS
Type I DM | Type II DM |
¦ Insulin-dependent | ¦ Non Insulin-dependent |
¦ Juvenile onset type (common among children) | ¦ Adult/Maturity onset type (common among 40 y.o. & above) |
¦ Non-obese | ¦ Obese |
¦ “Brittle disease” | ¦ “Non-brittle disease” |
¦ Etiology: Hereditary | ¦ Etiology: Obesity |
¦ Symptomatic | ¦ Asymptomatic |
¦ Characterized by Weight Loss | ¦ Characterized by Weight Gain |
¦ Treatment: Insulin | ¦ Treatment: Oral Hypoglycemic Agents (OHA) |
¦ Complications: Diabetic Ketoacidosis (DKA) ú Sodium Bicarbonate (NaHCO3) administered to treat acidosis | ¦ Complications: Hyper-Osmolar Non-Ketotic Coma (HONCK) ú Non-ketotic, so no lipolysis |
ú Can lead to coma | ú Can also lead to coma |
ú Can lead to seizure |
MICROGLIA
¦ Microglia are stationary cells that carry on phagocytosis
¦ Review:
ú Brain macrophage = Microglia
ú Blood macrophage = Monocyte
ú Kidney/Liver macrophage = Kupffer cell
ú Lung macrophage = Alveolar macrophage
ú Epithelial macrophage = Histiocytes
EPENDYMAL CELLS
¦ Ependymal cells secrete chemoattractants (glue) that concentrate bacteria
OLIGODENDROCYTES
¦ Produce myelin sheath
¦ Function: For insulation and to facilitate nerve impulse transmission
¦ The demyelinating disorders are MULTIPLE SCLEROSIS and ALZHEIMER’S DISEASE
ALZHEIMER’S DISEASE
¦ A type of dementia (degenerative disorder characterized by atrophy of the brain tissue)
¦ Caused by Acetylcholine (Ach) deficiency
¦ Irreversible
¦ Predisposing factors:
ú Aging
ú Aluminum toxicity
ú Hereditary
¦ SSx of Alzheimer’s (5 A’s):
ú Amnesia – partial or total loss of memory
§ The type of amnesia in Alzheimer’s is ANTEROGRADE AMNESIA.
§ 2 types of Amnesia:
ü Anterograde amnesia – loss of short-term memory
ü Retrograde amnesia – loss of long-term memory
ú Agnosia – inability to recognize familiar objects
ú Apraxia – inability to perform learned purposeful movements (using objects [toothbrush] for the wrong purpose)
ú Anomia – inability to name objects
ú Aphasia – inability to produce or comprehend language
§ The type of aphasia in Alzheimer’s is RECEPTIVE APHASIA.
§ 2 types of Aphasia:
ü Expressive aphasia (Broca’s aphasia)
þ inability to speak
þ positive nodding
þ nursing management is the use of a PICTURE BOARD
þ damage to Broca’s area (in frontal lobe), which is the motor speech center
ü Receptive aphasia (Wernicke’s aphasia)
þ inability to understand spoken words
þ positive illogical/irrational thoughts
þ can hear words but cannot put them into logical though
þ damage to Wernicke’s area (in temporal lobe), which is the language comprehension center
¦ The drugs of choice for Alzheimer’s are Donepezil [Aricept] or Tacrine [Cognex]
ú The drugs work by inhibiting cholinesterase (an enzyme that breaks down acetylcholine),
thereby increasing the levels of acetylcholine in the brain
thereby increasing the levels of acetylcholine in the brain
ú Best given at bedtime
MULTIPLE SCLEROSIS (MS)
¦ Chronic intermittent disorder of the CNS characterized by white patches of demyelination in the brain and spinal cord
¦ Characterized by remission and exacerbation
¦ Common among women 15 to 35 y.o.
¦ Predisposing factors:
ú Idiopathic (unknown)
ú Slow-growing viruses
ú Autoimmune
ú Note: other autoimmune diseases: Systemic Lupus Erythematosus (SLE), hypo & hyperthyroidism, pernicious anemia, myasthenia gravis
¦ There is no treatment for autoimmune diseases, only palliative or supportive care (just treat S & Sx)
2 Review: ANTIBODIES IgG – can cross placenta; provides passive immunity IgA – found in body secretions (sweat, tears, saliva and colostrum) IgM – acute inflammations; the largest antibody IgE – allergic reactions IgD – chronic inflammations |
S & Sx of Multiple Sclerosis
¦ Visual disturbances
ú BLURRED VISION is the INITIAL SIGN of MULTIPLE SCLEROSIS
ú Diplopia (double vision)
ú Scotoma (blind spot in the visual field)
¦ Impaired sensation to touch, pain, pressure, heat and cold
ú Tingling sensations
ú Paresthesia (numbness)
§ Do not give hot packs to patients with MS. Because of decreased heat sensitivity, heat application can cause burns.
¦ Mood Swings
ú Patients with MS are in a state of euphoria
S & Sx of Multiple Sclerosis (continued)
¦ Impaired motor activity
ú Weakness à spasticity à paralysis
¦ Impaired cerebellar function
ú ATAXIA (unsteady gait)
¦ Scanning speech
¦ Urinary retention and incontinence
¦ Constipation
¦ Decrease in sexual capacity
2 CHARCOT’S TRIAD Sx of MULTIPLE SCLEROSIS ¦ Ataxia ¦ Nystagmus ¦ Intentional Tremors |
Diagnostic Procedures for Multiple Sclerosis
¦ Cerebral analysis through lumbar puncture reveals increased IgG and protein
¦ MRI reveals site and extent of demyelination
¦ LHERMITTE’s SIGN
ú continuous contraction and pain in spinal cord following laminotomy
ú confirms diagnosis of MS
Nursing Management for Multiple Sclerosis
¦ Rx:
ú ACTH (steroids) – to reduce swelling and edema à prevents paralysis resulting from spinal cord compression
§ Steroids are best administered AM to mimic the normal diurnal rhythm of the body
§ Give 2/3 of dose in AM, 1/3 of dose in PM
§ ACTH is also administered in Motor Vehicular Accidents leading to spinal injury à prevents inflammation that can lead to paralysis
ú Muscle relaxants: Baclofen [Liorisal] and Dantrolene Sodium [Dantrium]
§ Can be used to treat hiccups, which is caused by irritation of the phrenic nerve.
ú Interferons – to alter immune response
ú Immunosuppresants
ú Diuretics – to treat urinary retention
ú Bethanecol Chloride [Urecholine] – cholinergic drug used to treat urinary retention; given subQ
§ Side effects of Bethanecol: Bronchospasm and Wheezing, so always check breath sounds 1 hour after administration.
§ Normal breath sounds are bronchovesicular.
ú Propantheline Bromide [Pro-Banthine] – antispasmodic drug to treat urinary incontinence
¦ Provide relaxation techniques
ú Deep breathing, yoga, biofeedback
¦ Maintain siderails – to prevent injury secondary to falls
¦ Prevent complications of immobility
ú Turn to side q 2 h, q 1 h for elderly patients, q 30 minutes on the affected extremity
¦ Provide catheterization
¦ Avoid heat application
¦ To treat constipation: Provide high fiber diet
¦ To treat UTI: Provide ACID-ASH DIET (acidifies urine to prevent bacterial infection)
ú Acid-ash diet consists of Grape, Cranberry, Plums, Prune Juice, Pineapple
ú Women are more prone to UTI
§ Females have shorter urethra (3 to 5 cm or 1 to 1½ inches) than males (20 cm or 6 to 8 inches)
§ Poor perineal hygiene (wiping from front to back)
§ Vaginal environment is moist (more conducive to bacteria)
§ Nursing Intervention: Avoid scented tissue paper, bubble baths, and using perfume or talcum powder in the perineum, as these can irritate the vagina
ú Male UTI is often related to post-coitus
§ Male must urinate after coitus to prevent urine stagnation
BRAIN
Composition:
¦ 80% Brain mass
¦ 10% Blood
¦ 10% Cerebrospinal Fluid (CSF)
Cerebrum
¦ Largest part of the brain
¦ Composed of 2 hemispheres (Left and Right) joined by the copus callosum
¦ Functions: sensory, motor and integrative
¦ Cerebral Lobes
ú Frontal
§ controls higher cortical thinking
§ Personality development
§ Motor functions
§ Inhibits primitive reflexes
§ Broca’s area, the motor speech center, is located in the frontal lobe
ú Temporal
§ controls hearing
§ Short-term memory
§ Wernicke’s area, the general interpretative area, is located in the temporal lobe
ú Parietal
§ Appreciation and discrimination of sensory impulses (touch, pain, pressure, heat, cold)
ú Occipital
§ Controls vision
ú Central (Insula or “Island of Reil”)
§ Controls visceral functions
ú Limbic system (rhinencephalon)
§ Controls smell
§ Anosmia is the absence of the sense of smell
§ Controls libido
§ Long-Term memory
ú Basal Ganglia
§ areas of gray matter located deep within each cerebral hemisphere
§ produce DOPAMINE, which controls gross voluntary movement
Remember: ü Dopamine deficit = PARKINSON’S DISEASE (Rx antiparkinsonian drugs to increase dopamine) ü Dopamine excess = SCHIZOPHRENIA (Rx antipsychotic drugs to decrease dopamine) ü Acetylcholine deficit = MYASTHENIA GRAVIS (Rx Mestinon to increase Ach) ü Acetylcholine excess = BIPOLAR DISORDER (Rx Lithium to decrease Ach) Notice that… ü Neurotransmitter deficit = MedSurg illnesses ü Neurotransmitter excess = Psych illnesses |
Diencephalon – interbrain or “between brain”
¦ Hypothalamus
ú Temperature regulation
ú Controls BP
ú Reticular activating system: controls sleep and wakefulness
ú Controls thirst
ú Satiety center: controls appetite
ú Emotional responses: fear (from known cause) , anxiety (from unknown cause) and excitement
ú Controls pituitary functions
§ Pituitary gland relies on stimulation from hypothalamus
¦ Thalamus
ú Relay station for sensation
Mesencephalon (midbrain)
¦ Relay station for sight and hearing:
ú Controls size and response of pupil
§ Normal pupil size is 2 to 3 mm
§ Isocoria is equal pupil size
§ Anisocoria is unequal pupil size
§ Normal pupil response if PERRLA [Pupils equal, round, reactive to light and accomodation]
§ Accomodation is pupillary constriction for near vision, and pupillary dilation for far vision.
ú Controls hearing acuity
Brainstem
¦ Pons – pneumotaxic center ( controls depth and rhythm of respiration)
¦ Medulla Oblongata – lowest part of the brain
ú Damage to medulla is the most life-threatening
ú Controls respiration, heart rate, vomiting, swallowing, hiccups
ú Vasomotor center (controls vessel constriction and dilation)
ú The medulla oblongata is the termination point of spinal decussation
Cerebellum
¦ Smallest part of the brain; cerebellum is also known as the “lesser brain”
¦ For balance, posture, equilibrium and gait
¦ Cerebellar tests:
ú Romberg’s test
§ two nurses positioned to the left and right of the patient
§ patient assumes normal position, with both eyes closed
§ tests for ATAXIA (unsteady gait)
ú Finger-to-nose test
§ Tests for DYMETRIA (inability of the body to stop a movement at a desired point)
ú Alternate pronation and supination
§ Also tests for dymetria
MONRO-KELLIE HYPOTHESIS
¦ The Monro-Kellie hypothesis states the relationship between ICP and cranial components (blood, CSF and brain tissue):
ú The skull is a closed container, therefore any alteration in one of the intrathecal components can lead to increased intracranial pressure
ú The normal ICP is 0 to 15 mmHg.
Cerebrospinal Fluid (CSF)
¦ 125 to 150 mL produced per day by the choroid plexus
¦ CSF is clear, colorless, odorless
¦ contains glucose, protein and WBCs
¦ does not contain RBCs
¦ Function: cushions the brain (shock absorption)
¦ Hydrocephalus – obstruction of the flow of CSF leading to enlargement of the skull posteriorly
ú Enlargement due to early closure of posterior fontanel
Blood
CEREBROVASCULAR ACCIDENT (STROKE)
¦ Partial or complete obstruction in the brain’s blood supply.
¦ Common sites of thrombotic stroke:
ú Middle cerebral artery
ú Internal carotid artery
¦ The leading cause of CVA is THROMBUS formation (attached clot)
ú A dislodged thrombus becomes an EMBOLUS (free-floating clot) à very dangerous if it goes to the BRAIN, HEART or LUNGS
¦ CVA causes increased ICP.
INCREASED INTRACRANIAL PRESSURE (ICP)
¦ Increased intracranial bulk brought about by an increase in one of the intracranial components
¦ Predisposing factors:
ú Head injury
ú Tumor
ú Localized abscess (pus)
ú Hydrocephalus
ú Meningitis
ú Cerebral edema
ú Hemorrhage (stroke)
¦ Note: For all causes of increased ICP, the patient should be positioned 30º to 45º (Semi-Fowler’s)
¦ Early Signs of Increased ICP
ú Change or decreased level of consciousness (restlessness to confusion)
ú Irritability and agitation
ú Disorientation to lethargy to stupor to coma
ú Remember: The 4 levels of consciousness: Conscious à Lethargy à Stupor à Coma
¦ Late Signs of Increased ICP
ú Changes in v/s
§ é Increased BP:
ü WIDENING PULSE PRESSURE – increased systolic pressure while diastolic pressure remains the same
ü Note: narrowing pulse pressure is seen in SHOCK (inadequate tissue perfusion).
§ ê Decreased Heart rate (bradycardia)
§ ê Decreased Respiratory rate (bradypnea)
ü Cheyne-Stokes respiration – hyperpnea followed by periods of apnea
§ Increased Temp
ü Note: Temp as a vital sign usually parallels BP
Vital signs | Increased ICP | Shock |
BP | é increased | ê decreased |
Heart Rate | ê decreased | é increased |
Resp Rate | ê decreased | é increased |
Temp | é high | ê low |
Pulse Pressure | é widening | ê narrowing |
§ Notes:
ü Increased heart rate in shock compensates for blood loss
ü Decreased temp in shock is due to decreased blood causing a decrease in warmth.
ü Hypertension, Bradycardia and irregular RR = CUSHING’S TRIAD of increased ICP
ü Increased BP as a response to increased ICP is termed as CUSHING REFLEX
þ Increased BP is an attempt by the body to maintain cerebral perfusion during increased ICP
ú Headache, papilledema, PROJECTILE VOMITTING
§ Papilledema is edema of the optic disc in the retina, leading to irreversible blindness
§ Projectile vomiting due to compression of the medulla, which is the center for vomiting.
ú Abnormal Posturing:
§ Decorticate posture – abnormal flexion, due to damage to the corticospinal tract (spinal cord & cerebral cortex)
§ Decerebrate posture– abnormal extension, due to damage to upper brain
§ Note: Flaccid posture is lost muscle tone, not found in increased ICP (found in poliomyelitis).
ú Unilateral dilation of pupils
§ Uncal herniation – herniation of uncus (in temporal lobe) puts pressure on Cranial Nerve III which controls parasympathetic input to the eye, causing unequal pupillary dilation (ANISOCORIA)
ú Possible seizure
¦ Nursing Management for increased ICP
ú Maintain patent airway and adequate ventilation
§ To prevent hypoxia (inadequate O2 in tissues) and hypercarbia (increased CO2 in blood)
ü Note: Hypoxemia is inadequate O2 in the blood
Early Signs of Hypoxia | Late Signs of Hypoxia |
¦ Restlessness ¦ Agitation ¦ Tachycardia | ¦ Bradycardia ¦ Cyanosis ¦ Dyspnea ¦ Extreme Restlessness |
Hypercarbia – CO2 retention
Remember: increased CO2 is the most potent respiratory stimulant
High CO2 à stimulates medulla à increase RR (hyperventilation) à normalized O2 and CO2
(negative feedback mechanism to maintain homeostasis)
¦ Nursing Management for increased ICP (continued)
ú Assist in mechanical ventilation: Ambubag or Mechanical Ventilator
§ Note: Ambubag should only be pressed during inspiration
ú Hyperventilate or hyper-oxygenate client to 100% before and after suctioning
§ Note: Suctioning performed for only 10 to 15 seconds; apply suction only while removing the suction catheter
§ When suctioning an endotracheal tube, insert the suction cath all the way until resistance is felt, to ensure complete removal of secretions
ú Position Semi-Fowler’s
§ Elevate head of bed 30 to 45º with neck in neutral position unless contraindicated to promote venous drainage.
ú Limit fluid intake to 1.2 to 1.5 L per day
§ Note: Forced fluids is 2 to 3 L per day
ú Monitor v/s, I&O and neurocheck (neurovital signs)
ú Prevent complications of immobility (turn to side)
ú Prevent further increased ICP:
§ Provide comfortable, quiet environment
ü Stress increases ICP
§ Avoid use of restraints [Jacket, wrist or elbow restraints]
ü Anxiousness increases ICP
§ Maintain siderails
§ Avoid clustering of nursing activities together
§ Instruct client to avoid activities leading to Valsalva maneuver (bearing down)
ü Avoid straining of stool: administer laxatives/stool softeners: Bisacodyl [Dulcolax]
ü Avoid excessive coughing: administer antitussives (cough suppresant): Dextromethorphan [Robitussin]
þ Note: common side effect of antitussives is drowsiness, so avoid driving or operating heavy machinery
ü Avoid vomiting: administer anti-emetic: Phenergan [Plasil]
ü Avoid bending, stooping, lifting heavy objects
ú Administer meds:
§ Osmotic diuretics – Mannitol [Osmitrol]
ü Check BP before administering; mannitol can lead to low fluid volume à hypotension
ü Monitor strictly I & O and inform physician if output is less than 30 cc per hour
ü Mannitol is given as side-drip (piggy-back)
þ Regulate at FAST-DRIP to prevent crystallization [formation of precipitates in tubing] à clogged IV line
þ Note: KVO rate is 10 to 15 gtts per minute
ü Inform client that he will feel a flushing sensation as the drug is introduced.
§ Loop Diuretics – Furosemide [Lasix]
ü Nursing management for loop diuretics is the same as for Osmotic diuretics
ü Lasix is given IV Push (from ampule)
ü Best given AM to prevent sleep disturbances. Lasix given PM will prevent restful sleep due to frequent urination.
§ Corticosteroids: Dexamethasone [Decadron] to decrease cerebral edema
ü Side-effect of steroids: respiratory depression
§ Mild analgesics: Codein Sulfate
§ Anticonvulsants: Dilantin [Phenytoin]
2 SIDE EFFECTS OF LASIX Normal Values ú ê K: HYPOKALEMIA 3.5 to 5.5 mEq/L ú ê Ca HYPOCALCEMIA 8.5 to 11 mg/dL ú ê Na: HYPONATREMIA 135 to 145 mEq/L ú é Glucose: HYPERGLYCEMIA 80 to 100 mg/dL ú é Uric Acid: HYPERURICEMIA 3 to 7 mg/dL |
HYPOKALEMIA | |||||
| |||||
HYPOCALCEMIA | |||||
¦ Tetany – involuntary muscle contraction ¦ SSx of hypocalcemia: ú Trousseau sign – carpal spasm when BP cuff is inflated 150 to 160 mmHg ú Chvostek sign – facial twitch when facial nerve is tapped at the angle of the jaw ¦ Complications of hypocalcemia: Arrhythmia and Seizure (Calcium deficiency is life-threatening!) ¦ Nursing management for hypocalcemia: ú Administer Ca Gluconate IV § Must be administered slowly to prevent cardiac arrest § Excess Ca Gluconate à Ca Gluconate toxicity à seizure § Antidote for Ca excess: Magnesium Sulfate ü Monitor for signs of MgSO4 toxicity (BURP): þ BP low þ Urine output low þ RR low þ PATELLAR REFLEX ABSENT – important! earliest sign of MgSO4 toxicity | |||||
HYPONATREMIA | |||||
¦ Low sodium à Fluid Volume Deficit àHypotension ¦ The initial sign of dehydration is THIRST (adults) or TACHYCARDIA (infants) ¦ Nursing Management: Force fluids (2 to 3 L/day), administer isotonic IV | |||||
HYPERGLYCEMIA | |||||
¦ SSx: 3P’s (Polyuria, Polydipsia, Polyphagia) ¦ Nursing Management: Monitor Fasting Blood Sugar (Normal FBS is 80 to 100 mg/dL) | |||||
HYPERURICEMIA | |||||
¦ Uric acid is a by-product of purine metabolism ¦ Foods high in uric acid: ú Organ meats, sardines, anchovies, legumes, nuts ¦ Tophi – uric acid crystals ¦ Gout – uric acid deposit in joints leading to joint pain & swelling, particularly affecting the great toes. ¦ Nursing Management for Gout: ú Force fluids (2 to 3 L/day) ú Rx: Allopurinol [Zyloprim] – drug of choice for gout § Most common side effect: allergic reaction (maculopapular rash) ú Rx: Colchicine – drug of choice for acute gout ¦ KIDNEY STONES – tophi accumulation in kidneys ú The pain associated with kidney stones is termed RENAL COLIC ú Nursing Management for Kidney Stones: § Force fluids § Rx: Morphine Sulfate – narcotic analgesics are the drug of choice to relieve renal colic ü Side-effect of narcotic analgesics: Respiratory depression, so always check RR before administering ü Antidote for Morphine overdose: Naloxone [Narcan] þ SSx of Naloxone toxicity: tremors § Strain the urine using gauze |
¦ A pathognomonic sign is a definitive diagnostic sign of a disease.
PATHOGNOMONIC SIGNS | |
Disease | Sign |
Tetany | Trousseau and Chvostek signs |
Tetanus | Risus sardonicus (abnormal sustained spasm of the facial muscles) |
Liver cirrhosis | Spider angioma, due to esophageal varices |
SLE | Butterfly rash |
Bulimia Nervosa | Chipmunk facies (parotid gland swelling) |
Leprosy | Leonine facies (thickened lion-like facial skin) |
Cushing syndrome | Moon face |
Measles | Koplik spots |
Diphtheria | Pseudomembrane on tonsils, pharynx and nasal cavity |
Down Syndrome | Protrusion of tongue, Simian crease on palm |
Kawasaki’s Disease | Strawberry tongue |
Pernicious anemia | Red beefy tongue |
Hyperthyroidism | Exophthalmos |
Asthma | Wheezing on expiration |
Emphysema | Barrel chest |
Pneumonia | Rusty sputum |
Addison’s disease | Bronze-like skin |
Appendicitis | Rebound tenderness |
Pancreatitis | Cullen’s sign (bluish discoloration of umbilicus) |
Chronic hemorrhagic pancreatitis | Gray-turner’s spot (ecchymosis in flank area) |
Cholera | Rice-watery stool |
Malaria | Chills |
Typhoid fever | Rose spots in abdomen |
Thrombophlebitis | Homan’s sign |
Meningitis | Kernig’s and Brudzinski’s sign |
Pyloric stenosis | Olive-shaped mass |
Hyperpituitarianism | Carotinemia |
Hepatitis | Jaundice |
Dengue | Petechiae |
Tetralogy of Fallot | Clubbing of fingers |
Cataract | Hazy vision (loss of central vision) |
Glaucoma | Tunnel vision (loss of peripheral vision) |
Retinal Detachment | Curtain veil-like vision (right or left side of vision is blocked) |
PTB | Low-grade afternoon fever |
Cholecystitis | Murphy’s sign (pain on deep inspiration when inflamed gallbladder is palpated) |
Angina Pectoris | Levine’s sign (hand clutching of chest) |
Patent Ductus Arteriosus | Machine-like murmur |
Myasthenia Gravis | Ptosis (drooping of eyelids) |
Parkinson’s Disease | Pill-Rolling Tremors |
Digoxin
¦ Indicated for Congestive Heart Failure
¦ Mechanism of digoxin: increases force of myocardial contractions, thereby increasing cardiac output
ú The normal cardiac output is 3 to 6 L/min.
¦ Nursing Management when administering Digoxin:
ú Check apical pulse rate: if below 60, withhold drug and notify the physician.
¦ SSx of Dig toxicity:
ú GI DISTURBANCES (Early Sign): Anorexia (loss of appetite is the most evident sign), nausea and vomiting, diarrhea
ú Visual disturbances: photophobia, XANTOPSIA (seeing yellow spots), diplopia
ú Confusion
¦ The antidote for dig toxicity is DIGIBIND
Congestive Heart Failure (CHF) | |||
¦ CHF can be Left-sided or Right-sided ¦ Left-sided CHF can lead to Right-sided CHF, but Right cannot lead to Left ¦ Lasix is given to both types of CHF ¦ CHF is the inability of the heart to pump blood towards systemic circulation ¦ RIGHT-SIDED CHF – the #1 cause is TRICUSPID VALVE STENOSIS ¦ LEFT-SIDED CHF – the #1 cause is MITRAL VALVE STENOSIS
| |||
Left-Sided Heart Failure (LSHF) | |||
¦ Can be caused by Rheumatic Heart Disease: ú Tonsillitis à strep bacteria migrate to mitral valve à RHEUMATIC HEART DISEASE à mitral stenosis à LSHF ¦ SSx of LSHF: ú Most of the symptoms of LSHF are RESPIRATORY: § Pulmonary edema and congestion § Dyspnea: ü Paroxysmal nocturnal dyspnea – difficulty of breathing at nighttime þ Nursing intervention: give patient 2 to 3 pillows ü Orthopnea – difficulty of breathing while lying down þ Nursing intervention: Position patient High-Fowlers or Orthopneic position § Productive cough, blood-tinged sputum § Frothy salivation – alveolar fluid in the mouth § Abnormal breath sounds: Rales (crackles) and bronchial wheezing ú Cardiovascular symptoms: § Pulsus alternans – weak pulse followed by strong bounding pulse ü Can lead to arrhythmia § Point of Maximal Impulse (PMI) is displaced laterally ü Fluid in the lungs pushes heart to one side ü Check apical pulse to determine the location of PMI ü Normal PMI is at the left midclavicular line between the 4th and 5th intercostals space (below the nipple). þ Note: if the PMI is displaced vertically (lower than normal) then the patient has cardiomegaly. § S3 extra heart sound (Ventricular gallop) ü Note: S4 sound occurs in myocardial infarction ú Anorexia and body malaise ú Cyanosis | |||
Right-Sided Heart Failure (RSHF) | |||
¦ SSx of RSHF: ú Venous congestion – blood goes back to superior & inferior vena cava ú Jugular vein distention ú Pitting edema ú Ascites – fluid in the peritoneal cavity ú Weight gain ú Hepatosplenomegaly ú Jaundice ú Pruritus and urticaria ú Esophageal varices ú Generalized body malaise and anorexia |
Lithium
¦ Antimanic agent – indicated for Bipolar Disorder
¦ Mechanism: decreases acetylcholine (Ach), norepinephrine and serotonin
¦ SSx of Lithium toxicity:
ú Anorexia
ú Diarrhea and Dehydration, therefore force fluids
ú Hypothyroidism
ú Fine tremors
¦ Nursing management for lithium:
ú Force fluids
ú Increase Sodium intake to 4 to 10 g daily
Aminophylline
¦ Indicated for Chronic Obstructive Pulmonary Disease (COPD)
¦ Bronchodilators dilate the bronchial tree, thereby allowing more air to enter the lungs
¦ SSx of aminophylline toxicity:
ú Tachycardia
ú Palpitations
ú CNS excitability: irritability, agitation, restlessness and tremors
¦ Nursing management for aminophylline:
ú AVOID COFFEE – will aggravate CNS excitability
4 Types of COPD
Bronchitis | Asthma | Bronchiectasis | Emphysema |
“blue-bloater” – cyanosis with edema | “pink-puffer” – acyanotic with compensatory purse-lip breathing | ||
Pathognomonic Sign: Wheezing on expiration | Hemoptysis – blood in cough | Pathognomonic Sign: Barrel-chest | |
Reversible | Irreversible | ||
Terminal stage | |||
Can lead to pneumothorax (air in pleural space), | |||
CO2 narcosis | |||
Caused by allergic reaction | Caused by allergic reaction | ||
Hereditary | Hereditary | ||
Surgery: Pneumonectomy (removal of 1 lung) | |||
Diagnosis: Bronchoscopy | |||
Can lead to Cor Pulmonale (enlarged right ventricle) | Can lead to Cor Pulmonale |
¦ For all types of COPD:
ú #1 cause is smoking
ú Expect doctor to prescribe bronchodilators
ú LOW-FLOW OXYGEN only so as not so suppress the respiratory drive
Dilantin
¦ Dilantin is an anticonvulsant – indicated for seizure disorders
¦ Seizure is the term for the first convulsive attack that an individual experiences
¦ Epilepsy is the term for the second or succeeding attacks
¦ Febrile seizures are normal for children below 5 y.o. (febrile seizures are outgrown)
¦ Nursing management when giving Dilantin:
ú Only mixed with plain NSS to prevent formation of crystals/precipitates
ú Given via “sandwich method” (give NSS à give dilantin à give NSS)
ú Instruct client to avoid taking alcohol (Dilantin + alcohol can lead to severe CNS depression)
¦ SSx of Dilantin toxicity:
ú GINGIVAL HYPERPLASIA (important!)
§ Remember to provide oral care to patient receiving Dilantin:
ü use soft bristle toothbrush
ü instruct client to massage gums
ú Hairy tongue
ú Ataxia – positive Romberg’s test
ú Nystagmus (abnormal movement of the eyes)
Acetaminophen [a.k.a Paracetamol]
¦ Acetaminophen is the treatment of choice for osteoarthritis
ú Pathognomonic sign of osteoarthritis: HEBERDEN’S NODES (knobs on finger joints)
ú Note: osteoarthritis is localized while rheumatoid arthritis is systemic.
¦ Sx of acetaminophen toxicity:
ú Hepatotoxicity – therefore monitor LIVER ENZYMES:
§ SGPT (serum glutamic pyruvate transaminase), also called ALT (alanine transaminase)
§ SGOT (serum glutamic oxaloacetic transaminase), also called AST (aspartate transaminase)
ú Nephrotoxicity – therefore monitor Blood Urea Nitrogen (BUN) and Creatinine
§ Normal BUN is 10 to 20 mg/dL
§ Normal Creatinine is 0.8 to 1.0 mg/dL
ü Creatinine is the most sensitive indicator of kidney function
ú Hypoglycemia
§ SSx of Hypoglycemia (Remember T-I-R-E-D):
ü Tremors, Tachycardia
ü Irritability
ü Restlessness
ü Extreme Fatigue
ü Diaphoresis, Depression
¦ The antidote for acetaminophen overdose is ACETYLCYSTEINE [Mucomyst]
ú Note: Acetylcysteine is a mucolytic used for respiratory conditions with excess and thick mucus production (emphysema, bronchitis, bronchiectasis)
ú Oral acetylcysteine comes in granule form and is orange-flavored (like powdered juice)
ú Acetylcysteine causes outpouring secretions.
§ N.Mgt. for administering acetylcysteine: prepare suction apparatus
Parkinson’s Disease
¦ A chronic progressive disorder of the CNS characterized by degeneration of DOPAMINE-producing cells in the substancia nigra of the midbrain and basal ganglia.
¦ Parkinson’s disease is irreversible
¦ Predisposing factors:
ú Lead and carbon monoxide poisoning
ú Arteriosclerosis – hardening of an artery
ú Hypoxia
ú Encephalitis
ú High doses of drugs:
§ Antihypertensives: Reserpine [Serpasil] and Methyldopa [Aldomet]
§ Anti-psychotic agents: Haloperidol [Haldol] and Phenothiazines
ü Recall: Anti-hypertensives have PNS effects, Anti-psychotics have SNS effects
§ Side effects of Reserpine: DEPRESSION and BREAST CANCER
§ Note: Reserpine is the only antihypertensive with a major side effect of depression à patient becomes SUICIDAL
§ Nursing management for suicidal patients: PROMOTE SAFETY (remove equipment that patient can use to harm himself)
2 Triad causes of suicide: 1. Loss of spouse 2. Loss of job 3. Aloneness |
§ Nursing management for suicidal patients: DIRECT APPROACH
ü Maintain patient on close supervision
§ Reserpine is also linked to the development of BREAST CANCER.
ONCOLOGIC NURSING ¦ The most frequent types of cancer in women (in order): 1. Breast 2. Cervical 3. Ovarian 4. Uterine ¦ The most frequent types of cancer in men (in order): 1. Bronchogenic (lung) 2. Hepatic (liver) 3. Prostate – for men 40 y.o. and above 4. Testicular – for men 30 y.o. and above § 3 L’s of testicular cancer: ü Large ü Lumped ü Loaded (heavy) |
Anyway, back to Parkinson’s…
¦ SSx of Parkinson’s disease:
ú Early sign: PILL-ROLLING TREMORS – pathognomonic sign of Parkinson’s
ú Second sign: BRADYKINESIA (slowness of movement)
§ “cogwheel” rigidity – intermittent jerking movement
§ Stooped posture
§ Shuffling Gait, Propulsive Gait
¦ SSx of Parkinson’s disease (continued):
ú Overfatigue
ú Mask-like facial expression
ú Decreased blinking of the eyes
ú Difficulty in arising from sitting position
ú Monotone speech
ú Mood: Lability (depressed) à prone to suicide, therefore PROMOTE SAFETY
ú Increased salivation (drooling)
§ Prepare suction app at bedside
ú Autonomic changes:
§ Increased sweating and lacrimation
§ Seborrhea (oversecretion of sebaceous gland)
§ Decreased sexual capacity
¦ Stages of Parkinson’s Disease
I. Unilateral flexion of upper extremities
II. Shuffling gait
III. Progressive difficulty in ambulating
IV. Progressive weakness
V. Disability = last stage
¦ Nursing management for Parkinson’s
ú
2 Anti-Parkinsonians 1. Larodopa 2. Sinemet 3. Symmetrel 4. Artane and Cogentin 5. Benadryl 6. Parlodel |
§ Levodopa (L-dopa) [Larodopa] – short-acting anti-parkinson
ü Mechanism: increases levels of dopamine
ü Side effects:
þ GIT irritation (nausea and vomiting)
þ ORTHOSTATIC HYPOTENSION – always asked in the board exam!
þ Arrhythmia
þ Hallucination
þ Confusion
ü Contraindications of L-dopa
þ Not given to clients with glaucoma
þ Not given to patients taking MAO inhibitors (tricyclic antidepressants)
§ The MAO inhibitors are Marplan, Nardil and Parnate
§ Patients taking MAO inhibitors should be instructed to avoid foods rich in Tyramine (cheese, beer, wine, avocado) because MAOIs + Tyramine = Hypertensive crisis (severe hpn causing organ damage)
ü Nursing management for L-dopa
þ Best given with meals to avoid GIT irritation
þ Inform client that his urine and stool may be darkened
þ Instruct client to avoid foods rich in Vit B6 (Pyridoxine): cereals, green leafy vegetables and organ meats
§ Pyridoxine reverses the therapeutic effect of levodopa
· Note: Vit B6 intake should be increased for patients taking Isoniazid (INH) to counter INH side-effect of peripheral neuritis
§ Carbidopa [Sinemet] – long-acting anti-parkinson
ü Mechanism: same as levodopa
ü Side effects:
þ Hypokinesia
þ Hyperkinesias
þ Psychiatric symptoms: EXTRA-PYRAMIDAL SYMPTOMS
§ Amantadine HCl [Symmetrel]
ü Mechanism: same as levodopa
ü Side effects:
þ Tremors
þ Rigidity
þ Bradykinesia
ú Rx for Parkinson’s (continued):
§ Anticholinergics: [Artane] and [Cogentin]
ü Anticholinergics are given to relieve tremors
ü Mechanism of action: inhibits acetylcholine
ü Side-effects: SNS effects
§ Antihistamines: Diphenhydramine [Benadryl]
ü Antihistamines also relieve tremors
ü Side effect for adults: drowsiness
þ Patient should avoid driving and operating machinery
ü Side effect for children: CNS excitability – hyperactivity (paradoxical effect for young children < 2 y.o.)
§ Dopamine agonists: Bromocriptine [Parlodel]
ü Relieves tremors, rigidity and bradykinesia
ü Side-effect: Respiratory depression, therefore CHECK RR
ú Maintain siderails, to prevent injury related to falls
ú Prevent complications of immobility: Turn to side q 2, q 1 if elderly
ú Diet should be low-protein in AM, high-protein in PM (give milk before bedtime)
§ High-protein diet induces sleep (Tryptophan is a precursor to melatonin, the sleep hormone)
ú Increase oral fluid intake and high-fiber diet to prevent constipation
§ Increase intake of bran and psyllium; use bulk-forming laxatives [Metamucil]
ú Assist in ambulation
ú Safety precautions: Patient should wear flat rubber shoes, and use grab bars
ú Assist in surgical procedure: STEREOTAXIC THALAMOTOMY
§ A portion of the thalamus is destroyed to reduce tremors
§ Complications of the procedure:
ü Subarachnoid hemorrhage
ü Encephalitis
ü Aneurysm
Meningitis
¦ Inflammation of the meninges
¦ The meninges is a three-fold membrane that covers the brain and spinal cord.
ú Function of the meninges: support and protection, nourishment and blood supply
ú 3 layers of the meninges:
§ Dura matter – outermost
ü Subdural space – between dura and arachnoid matter
§
2 SSx of Meningitis ¦ Headache, photophobia, fever and chills, anorexia, weight loss, generalized body malaise ¦ INCREASED ICP à projectile vomiting, decorticate & decerebrate posturing ¦ Signs of meningeal irritation: ú Nuchal rigidity (stiff neck) is the initial sign of meningitis. ú Opisthotonus (hyperextension of head and neck) is the second sign. ¦ Pathognomonic signs of meningitis: ú Kernig’s sign – leg pain (severe pain is felt upon straightening the leg when the thigh is flexed) ú Brudzinski’s sign – neck pain (severe neck stiffness causes a patient's hips and knees to flex when the neck is flexed) |
ü Subarachnoid space – between arachnoid and pia matter
þ The subarachnoid space is where CSF circulates
þ The subarachnoid space between L3 and L4 is the site for lumbar puncture.
§ Pia matter – innermost
¦ Etiologic agents for meningitis:
ú Meningococcus – most dangerous cause of meningitis
ú Pneumococcus
ú Streptococcus – causes adult meningitis
ú Haemophilus influenzae – causes pediatric meningitis
¦ The mode of transmission of meningitis is AIRBORNE via droplet nuclei.
ú Transmitted through coughing, talking, sneezing, kissing
ú Not transmitted through sexual contact
Diagnostic Tests for Meningitis:
¦ LUMBAR PUNCTURE (spinal tap) – diagnostic procedure for meningitis
ú A hollow needle is inserted into the subarachnoid space to obtain a sample of cerebrospinal fluid
ú Nursing management before LP:
§ Secure informed consent and explain the procedure to the patient:
ü Note: All surgeries should be explained by the doctor, but all diagnostic procedures should be explained by the nurse!!!
§ Empty bladder and bowel to promote comfort.
§ Encourage client to arch his back to enable the physician to clearly visualize L3 and L4.
ú Nursing management after LP:
§ Place client flat on bed for 12 to 24 hours after the procedure to prevent spinal headache and leakage of CSF.
ü Spinal headache is due to decreased CSF pressure (similar to orthostatic hypotension).
§ Force fluids to replace lost CSF
§ Check the puncture site for discomfort, discoloration and leakage to tissues
§ Assess for movement and sensation of extremities to determine if the procedure caused any nerve damage.
ú If the patient has meningitis:
§ CSF analysis would reveal elevated protein and WBC, decreased glucose, increased CSF opening pressure (normal CSF pressure is 50 – 160 mmHg), and (+) bacterial culture
¦ Complete blood count (CBC) reveals Leukocytosis (increased WBC)
Notes on Hematology:
Increased | Decreased | |
RBC | Polycythemia | Anemia |
WBC | Leukocytosis | Leukopenia |
Platelets | Thrombocytosis | Thrombocytopenia |
¦ NDx for patient with Anemia: Activity Intolerance; NMgt is to place the patient on complete bed rest and administer O2.
¦ Polycythemia à agglutination à thrombosis à HYPERTENSIVE STROKE
ú Initial sign of hpn stroke is headache.
ú Late sign is pruritus/itchiness due to abnormal histamine metabolism
¦ Thrombocytopenia: decreased platelets à bleeding à hemorrhage
ú Side-effects of platelet dysfunction:
§ Eccymosis
§ Petechiae/purpura
§ Oozing of blood from puncture site.
ú NMgt for thrombocytopenia: Avoid parenteral injections
ú Note: Platelets depletion happens in Disseminated Intravascular Coagulation à treated by heparin
¦ Leukocytosis leads to increased susceptibility to infections, so place the patient on REVERSE ISOLATION (to protect the patient).
¦ Patients with infectious diseases are places on STRICT ISOLATION (to protect other patients).
Nursing Management for Meningitis:
¦ Administer Rx:
ú Broad spectrum antibiotics (Penicillin)
ú Analgesics
ú Antipyretics
¦ Institute strict respiratory isolation 24 hours after initiation of antibiotic therapy.
¦ Comfortable and dark environment
¦ Monitor v/s, I&O and neurocheck
¦ Maintain fluid and electrolyte balance
¦ Prevent complications of immobility
¦ Institute measures to prevent inc ICP
Review: Adrenal Gland
Hormones of the Adrenal Cortex:
¦ Sugar: Glucocorticoids (e.g. cortisol) control glucose metabolism
¦ Salt: Mineralocorticoids (e.g. aldosterone) promote sodium and water reabsorption and potassium excretion
¦ Sex: Androgenic hormones (testosterone, estrogen, progesterone) promote development of secondary sexual char
Diseases of the Adrenal Gland:
Addison’s disease Hyposecretion of adrenal hormones | Cushing’s syndrome Hypersecretion of adrenal hormones |
¦ Sugar ê: hypoglycemia ¦ Salt ê: hyponatremia, with hyperkalemia ¦ Sex ê: decreased libido | ¦ Sugar é: hyperglycemia ¦ Salt é: hypernatremia, with hypokalemia ¦ Sex é: hirsutism, acne, striae |
Hypoglycemia (T-I-R-E-D) ¦ Tremors/Tachycardia ¦ Irritability ¦ Restlessness ¦ Extreme fatigue ¦ Diaphoresis/Depression | Hyperglycemia (P-P-P) ¦ Polyuria ¦ Polydypsia ¦ Polyphagia Note: DM is a complication of Cushing’s |
¦ Decreased tolerance to stress due to decreased steroids à can lead to ADDISIONIAN CRISIS | ¦ Increased steroids cause decreased WBC (Leukopenia) à IMMUNODEFICIENCY Note: Steroids takers (athletes,body builders) experience ssx of Cushing’s |
Hyponatremia ¦ Hypotension ¦ Dehydration ¦ Weight Loss | Hypernatremia with Fluid Volume Excess ¦ Hypertension ¦ Edema ¦ Weight Gain ¦ Pathognomonic Sx of Cushings: ú Moon-face ú Buffalo hump ú Obese trunks ú Pendulous Abdomen ú Thin extremeties |
Hyperkalemia ¦ Irritability, agitation ¦ Diarrhea, abdominal cramps ¦ Peak T waves à arrhythmia | Hypokalemia ¦ Weakness, fatigue ¦ Constipation ¦ Prominent U wave à can also lead to arrhythmia |
¦ Decreased sexual urge and loss of pubic and axillary hair | ¦ Hirsutism, acne and striae due to increased sex hormones |
¦ Pathognomonic sx: Bronze-like skin ú Decreased cortisol causes pituitary gland to secrete Melanocyte-stimulating hormone | ¦ Other signs: ¦ Depression ¦ Easy bruising ¦ Increased masculinity in women |
Management: ¦ Steroids (2/3 dose in AM and 1/3 dose in PM) | Management: ¦ Potassium-sparing diuretics: Aldactone [Spironolactone] – promotes excretion of sodium while retaining potassium ¦ DO NOT GIVE LASIX ¦ Limit fluids ¦ Increase potassium in the diet |
Nursing Management for Meningitis (continued):
¦ Provide client Health teaching and discharge planning
¦ Diet: High carb, high protein, high cal with small freq feedings
¦ Prevent complications: HYDROCEPHALUS and NERVE DEAFNESS
ú Patient with meningitis should be referred to an audiologist for testing.
¦ Rehabilitation for residual deficits: mental retardation or delay in psychomotor development
Myasthenia Gravis
¦ A neurovascular disorder characterized by a disturbance in the transmission of impulse fro nerve to muscle cells at the neuromuscular junction leading to DESCENDING MUSCLE PARALYSIS.
¦ More common in women aged 20 to 40.
¦ Etiology: idiopathic, related to autoimmune
ú For unknown reasons, the body is producing cholinesterase which destroys acetylcholine, the neurotransmitter for muscle movement, leading to muscle weakness.
¦ SSx:
ú Initial Sign: PTOSIS (drooping of upper eyelid)
ú Diplopia
ú Masklike facial expression
ú Dysphagia
ú Hoarseness
ú Respiratory muscle weakness à respiratory arrest (Prepare tracheostomy set at bedside)
ú Extreme muscle weakness especially during activity or exertion
¦ Dx test:
ú TENSILON TEST
§ Tensilon (Edrophonium HCl) is a short acting anti-cholinesterase
§ Tensilon is administered via IV push
§ If patient has MG, symptoms will be temporarily relieved (for 5 to 10 minutes)
ú CSF analysis reveals elevated cholinesterase levels
ú
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