Anatomy. Miss.kamlah 2
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1 Miss.kamlah 1
2 Anatomy The brain, spinal cord are the major structures of the nervous system. The brain is protected by the skull & covered by three lyres of tissue called the meninges- the dura mater, archniod, & pia mater. Cerebrospinal fluid circulate within the ventricles of the brain & around the brain & spinal cord. CSF is produced in pia mater, then pass through canals to the lateral ventricle then to the third ventricle then to the forth ventricle then reabsorbed by the archniod layer ( this process takes about 6 hours) Miss.kamlah 2
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4 Pediatric differences The brain & spinal cord are formed from the neural plate, which evolve into the neural groove & neural folds by the third week of gestation. The groove closes to form the neural tubes which become the central nervous system. In infants, the cranial bones & vertebrae are not completely ossified putting the child at risk for injury. Fontanels are spaces in connective tissue that allow for normal brain growth. (anterior, posterior). Miss.kamlah 4
5 By 12 years of age the sutures are completely ossified & can not be separated. At birth, the nervous system is complete but immature. So growth of brain continues until the child is years of age. Myelination, the progressive covering of myelin of lipid protein sheath, is also incomplete at birth. As myelination progress, the primitive reflexes disappears. And this process continues throughout childhood. Miss.kamlah 5
6 Diagnostic tests used to evaluate Neurological condition CT scan. EEG: electroencephalogram. ICP: intracranial pressure monitoring. Lumber puncture. MRI. X-ray. Ultrasound. CSF culture, analysis. Glascocoma scale. Miss.kamlah 6
7 Category Eye opining Verbal response Motor response Score Infant & young children Spontaneous opining To loud noise To pain No response Smiles. Coos, cries Irritable; cries Inappropriate crying Grunt; moans No response Spontaneous movement Withdraws to touch Withdraw to pain Abnormal flexion Abnormal extension No response Older child & adult Spontaneous To verbal stimuli To pain No response Oriented * 3 Confused Inappropriate word Incomprehensible word No response Obeys commands Localize pain Withdraw to pain Flexion to pain Extension to pain No response Miss.kamlah 7
8 Assessment Guide lines Level of copiousness Cranial nerves Fontanels & statures Cognitive function Pupils Vital signs Posture & movements Neck stiffness Pain Clascocoma scale Assess function of cranial nerves. Assess by palpation Assess use of verbal skills Equal, round, react to light, accommodation Meanly heart rate, respiratory rate Assess reflexes, fine & motor function Assess neck rigidity Assess level of pain Miss.kamlah 8
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10 CSF Analysis Category Appearance Cell counts protein Glucose Albumin Normal range Clear, colorless 0-8/ mm mg/100 ml % 8 : 1 to globulin ratio Miss.kamlah 10
11 Signs of increased intracranial pressure Timing of signs Early signs Infant has above signs plus: Late signs Signs headache, visual disturbances, nausea & vomiting, dizziness or vertigo Irritability, bulging fontanel, wide stature, increased head circumference Decrease in level of consciousness, bradycardia, irregular respiration, fixed dilated pupils. Miss.kamlah 11
12 Seizure Disorders Seizures are periods of abnormal electrical discharges in the brain that causes involuntary movements as well as, behavioral & sensory alteration. Epilepsy is a chronic disorder characterized by recurrent, unprovoked seizures secondary to CNS disorder. It has two main types: 1- partial or focal seizure. 2- generalized seizure Miss.kamlah 12
13 Etiology & Pathophsiology Chemical changes occur in the neurons will create an electrical negativity that enable the transfer of information between neurons. When an excessive number of these cells become excited, they discharge abnormally. Some seizure are idiopathic & not provoked, while others can be provoked by stimuli such as: emotional stress, anxiety, fatigue, infections, trauma, hypoglycemia, hypotonic dehydration, endocrine dysfunction, electrolyte imbalance, toxins, tumors. The focal seizures are caused by abnormal electrical activity in one hemisphere, or specific area of the cerebral cortex. That results in localized symptoms related to the region of the cortex affected. Miss.kamlah 13
14 In the generalized seizures; they results from a diffuse electrical activity that begin in both hemispheres & spread throughout the cortex into the brainstem. As a result, the movements & spasm displayed by the child are bilateral & symmetric. The length of the seizure is important, the child may become cyanotic or pale & hypoglycemic due to increase in the metabolic rate. Febrile seizures are generalized seizures occur in children who have high grade fever (>39c) in association with acute illness. It involves generalized tonic-clonic movements that lasts less than 15 minutes. Miss.kamlah 14
15 Clinical manifestations It depend on the type & duration of seizures. Seizures has four stages: 1- the Aura: the first stage, in which the child experience an olfactory or visual sensory sensation that may provide an early warning sign of seizure. 2- tonic phase: the contraction phase, where muscle is contracted, the patient is unconscious. 3- clonic phase: the phase that involves periods of contractions & relaxations. 4- the postictal period: it follows the seizure activity, the patient's level of consciousness is decreased. It ranged from 30 min to 2 hours. Miss.kamlah 15
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17 Diagnostic tests: MRI. CT scan. EEG CBC Lumbar puncture. Lead level. Urine culture. Past History Miss.kamlah 17
18 Clinical therapy In febrile seizures, no anticonvulsant therapy is administered in both short & long term treatment due to their side effects. So parent are taught to lower fever by using antipyretic & keeping the child cool with light clothing. As well as protect the child from injury in future seizure. If the seizure is sever or the child experience a second episode, the parent may be given rectal diazepam or diazepam gel. Miss.kamlah 18
19 Continue Any child with a generalized seizure lasting longer than 10 minutes needs to be monitored for electrolytes, glucose, blood gases, increasing fever, & abnormal blood pressure. Anticonvulsant are given rectaly or intravenously to control seizure. Most children respond to monotherapy (use of single drug a time) to minimize the side effects of sleepiness, decreased attention & memory, difficulty of speech, ataxia, & diplopia. Observe the child for status epilepticus ( which is a contentious seizure that lasts for longer than 30 minutes or s series of seizure during which the consciousness is not regained). Miss.kamlah 19
20 Nursing managements Possible nursing diagnosis: Ineffective breathing patterns. Ineffective airway clearness. Altered tissue perfusion. Impaired gas exchange. Risk for trauma. Anxiety Miss.kamlah 20
21 Continue Maintain airway patency by: 1. Place nothing in the child s mouth, to not broke teeth that could leads to aspiration. 2. Position the child on the side so secretion will be drain out. 3. Ensure adequate oxygenation. 4. If the child in hospital put on O2 supplement. Ensure safety by: 1. Protect the child from violent seizures. 2. Elevate side rail if the child on the bed and pad them. 3. The child should not be left alone. E.g. in bathtub. Miss.kamlah 21
22 Administer medication: 1. Take especial precautions when administering intravenous medication during emergency management. 2. If medication are given intravenously, it must be given slowly to minimize the risk of respiratory or circulatory collapse. 3. Rectal medication is the safest method to give medication at home, but oral medication can be prescribed for children with mild infrequent seizures. Provide emotional support. Miss.kamlah 22
23 Reye s Syndrome Is a disorder that includes hepatic dysfunction & an acute encephalopathy (a cerebral dysfunction caused by a toxic, injury, inflammatory, or anoxic insult that may result in permanent tissue damage). The condition is associated with the use of aspirin especially in children under the age of five. The etiology is unknown, an encephalopathy occur after the child had a mild viral infection or when the child has been given aspirin or aspirin containing products. The syndrome is characterized by cerebral edema, hypoglycemia, & enlarged liver. Miss.kamlah 23
24 Symptoms started with nausea & vomiting, mental status changes, seizure, progressive unresponsiveness. It has five stages in which each stage is characterized by progressive symptoms. Treatment includes: hospitalization in the ICU, put the child on MV if child in coma, monitor blood gases. monitoring the child physical status, provide emotional support, teaching the parents about the disease process. Miss.kamlah 24
25 Structural defects Microcephaly: indicates a small brain with a head circumference that is more than 3 standard deviation below the mean for age & sex. It may be caused by chromosomal abnormality, maternal infections. Those children have mental retardation. There is no treatment for microcephaly. Miss.kamlah 25
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27 Hydrocephalus Is the body s response to imbalance between the production & absorption of the CSF. It is often congenital but can be acquired. CSF is produced at constant rate of 0.3 ml per minute. When the balance disturbed, the ventricles become enlarged. In children with post infection meningitis, intra ventricular hemorrhage, or a congenital malformation in subarachniod space; the absorption process in the archniod layer become impaired, leading to hydrocephalus. Miss.kamlah 27
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29 Clinical manifestations Diagnostic tests It vary with the age of the child. Rapidly increasing head circumference, tense bulging fontanels, hyperreflexia, poor feeding. Difficulty holding head up, vomiting, apnea, cardiopulmonary depression. MRI CT scan Head circumference Miss.kamlah 29
30 Clinical therapy It involves removing the obstruction or creating a new CSF pathway to divert excess CSF. A catheter or shunt is placed in the ventricle and passes the CSF to the peritoneal cavity, atrium of the heart, or the pleural spaces. Shunt system is consist of 4 parts: a ventricular catheter, a pumping chamber or reservoir, a one-way pressure valve & a distal catheter. Mechanical complication may include blockage of the catheter, kinking of the tubing or valve breakdown. As well as infections of the shunt, so CSF culture is needed. The shunt must be removed & replaced by another when the CSF culture is sterile. Miss.kamlah 30
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32 Nursing management Provide emotional support. Position the child carefully; don t strain the neck muscle since they must support the large head. Provide good skin care. Reduce the chances for skin breakdown by placing sheepskin under the head. Provide small feeding with frequent barbing because the infant is prone to vomiting. Elevate the head of the bed to facilitate rapid CSF drainage. Take V/S every 2-4 hours. Use aseptic technique when performing incision care Monitor the child for malfunction of the catheter, increased intracranial pressure or infection. Miss.kamlah 32
33 Myelomeningocele & Spina Bifida Myelomeningocele is referred to a malformation of the spinal cord & spinal canal. Spina bifida is referred to a defect in one or more vertebrae through which spinal cord contents can protrude. It can occur along the vertebral column, but it occur most commonly on the lumber & sacral region. It has unknown cause, it is associated with the use of medication, chemicals, genetic factors, maternal health conditions, as gestational diabetes, folic acid deficiency. Miss.kamlah 33
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36 Clinical Manifestations A sac- like protrusion on the infant s back indicates meningocele or myelomeningocele. Sensory loss in the legs, around the anus, genetalia, & feet. If the sac on the thoracic or lumbar 1-2 level: paralysis in the legs, weakness, & sensory loss of the trunk. At lumbar 3 level: can flex the hip & extended the knee but ankles & toes are paralyzed. At lumbar 4-5 level: can flex the hip & extend the knees; weak or absent ankle extension, toe flexion. Sacral level: mild weakness in the ankles & toes; bladder & bowel function may be affected. Miss.kamlah 36
37 Therapy Surgery to close & repair the lesion usually within hours of the infant's birth to reduce infection. Nurses must provide preoperative & postoperative care. Place the child in prone position with gentile handling of the child to prevent rupture of the sac & reduce the chance of infection. Monitor CSF leakage. Monitor for signs of symptoms of infection such as meningitis. Gentile range of motion exercise must be started to prevent muscles atrophy. Miss.kamlah 37
38 Infectious Diseases It includes: 1. Bacterial meningitis. 2. Viral meningitis. 3. Encephalitis. Miss.kamlah 38
39 Bacterial meningitis (septic) Meningitis is an inflammation of the meninges, that can be bacterial or viral. Bacterial meningitis is more virulent than viral meningitis & some times fatal. Bacterial meningitis occur secondary to other infections such as otitis media, sinusitis, pharyngitis, cellulites, pneumonia, TB or due to brain trauma or neurosurgical procedure. Miss.kamlah 39
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41 The majority of organisms that cause bacterial meningitis are Haemophilus influenza type b, Nesseria meningitis & streptococcus pneumonia. in many cases, bacteremia spread the infection to the CNS where it inters the subarachnoid space. An inflammatory response then follows, leading WBCs to accumulate & covering the surface of the brain with a thick, white, purulent exudates. If infection reaches the ventricles, it will obstruct the flow of CSF causing increased intracranial pressure & hydrocephalus. Miss.kamlah 41
42 Viral meningitis ( Aseptic) Is an inflammatory process characterized by an increased number of blood cells & protein in the CSF. The enteroviruses if often the cause of more than 80% of viral meningitis cases. The child usually does not appear ill as in the bacterial meningitis. Miss.kamlah 42
43 Clinical manifestations In bacterial meningitis: The onset is sudden or develops over 1-2 days. Symptoms includes high grade fever, poor feeding, vomiting, diarrhea, restless, lethargic or irritable. In older children, they may show delirium, impaired consciousness & joint pain. As well as to headache, photophobia, nuchal rigidity (resistance to neck flexion), positive Kernig s or Brudzinski sign or both. Symptoms can develop to include seizures, apnea, cerebral edema, DIC, shock, & increased intracranial pressure. Miss.kamlah 43
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45 In viral meningitis: The child develops general malaise, may be irritable, has low grade fever, headache, photophobia, gastrointestinal distress, upper respiratory symptoms. Stiff neck, back pain, positive Kernig s or Brudzinski sign or both, the child have tense anterior fontanel. The symptoms usually resolved within 3-10 days spontaneously. Seizures are rare. The child assume opisthotonic position, with the neck & head are hyperextend to relief discomfort. Miss.kamlah 45
46 Diagnostic tests: Diagnosis is based on: History & physical examination. CBC. Blood culture. Lumber puncture. Ct scan. CSF analysis & culture. That shows decreased glucose levels in the CSF in bacterial meningitis and elevated WBCs & protein in viral meningitis. Miss.kamlah 46
47 Clinical therapy In the majority of cases, antibiotic are administered as soon as tests obtained. Antibiotic commonly used to treat bacterial meningitis includes ampicillin, aminoglycoside, cefotaxime & vancomycin. Cortecocosteriod are given to the child who is over than 6 weeks to age to reduce the risk of sever neurological sequelae such as sensorineural hearing loss, especially in cases of Haemophilus influenza type b. Miss.kamlah 47
48 Continue Medication to decreased the high intracranial pressure such as manitol, antipyretic, high-dose of barbiturate. The child must kept NPO, and IVF is started. In viral meningitis: until the diagnosis is confirmed, the child is treated aggressively, as he or she has bacterial meningitis. Treatment is supportive of symptoms. Miss.kamlah 48
49 Nursing interventions: Monitor respiratory & neurological status. Maintain hydration. Administer medication. Prevent complications. Promote the child s comfort with reduced stimulation (dim light, quiet room) & by placing him in a side-lying position. Isolate the child until the organism is detected and effective treatment is underway. Relive isolation after 48 hours from antibiotic treatment started. Miss.kamlah 49
50 Encephalitis An acute condition of an inflammation of the brain tissue. It could occur as a direct of primary infection by an organism that past the blood brain barrier. Sign & symptoms vary according to the causative organism & the location of the infection. Initially the child shows sever headache & fever, followed by altered mental status or focal neurological signs. Meningial irritation signs are common such as, photophobia, nuchal rigidity, positive Kernig s or Brudzinski sign or both. Focal or generalized seizures may be present. Miss.kamlah 50
51 Diagnosis is based on history & laboratory findings, CSF analysis, MRI, EEG, CT scan. Treatment must include both pharmacological & supportive treatment. As in bacterial meningitis, antibiotic treatment is started until CSF culture is done and causative organism is identified. Nursing intervention is same as in meningitis. Miss.kamlah 51
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