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Chapter 9
Unit 2: Nursing care of clients with neurosensory disorders
| Question | Answer |
|---|---|
| Brain tumors (Pg. 91) How classified? | To the cell or tissue of origin |
| Supratentorial tumors occur where? | In the cerebral hemispheres above the tentorium cerebella |
| Infratentorial tumors occur where? | Below the tentorium cerebella -Brainstem and cerebellum |
| What do brain tumors do? | Apply pressure to surrounding brain tissue; resulting in decreased outflow of CSF -Increased intracranial pressure -Cerebral edema -Neuro deficits |
| Tumors involving the pituitary gland can cause? | Endocrine dysfunctions |
| Primary malignant brain tumors originate where? | From neuro tissue; rarely metastasize outside the brain |
| Secondary malignant brain tumors originate where? | From somewhere else in the body and spread to the brain |
| Where do benign brain tumors develop from? | Meninges or cranial nerves; do not metastasize |
| Are there any routine screening procedures to detect brain tumors? | No |
| Risks to developing brain tumors? | Genetics, env't, ionizing radiation, electromagnetic fields, previous head injury |
| S/S of a brain tumor: (Pg. 92) | Dysarthria , dysphagia, positive Romberg and positive babinski's -Vertigo, hemiparesis, loss of gag or blink (cranial nerves) Etc. |
| Lab tests for brain tumors? | CBC & differential rule out anemia Blood alcohol & toxicology to rule out TB/HIV if social conditions warrant |
| Dx procedures for brain tumors | X-ray, CT, MRI, PET, cerebral angiography |
| Cerebral biopsy: | Dx procedure for brain tumors -Cellular pathology -Possible image guiding (MRI/CT) -What is seen to be abnormal is obtained then sent to pathology |
| Benefits to biopsy: | Minimally disruptive to other brain areas -Decreased recovery time & less risks than open craniotomy |
| Negative to biopsy: | Does not remove/debulk tumor -Could be inconclusive -Misdx can occur |
| Preprocedure nursing actions for a biopsy: -AED, aspirin | -If on AED, con't to avoid seizures -Discontinue aspirin 72hrs prior to the procedure |
| Postprocedure for a biopsy: | -Normal activities after recovery from general anesthesia -Clean/dry incision -If sutures; remove 1-7 days after -Avoid driving, etc. until dx known/follow up apt. |
| What kind of pain meds are used to tx headaches associated w brain tumors? | Nonopioids; to avoid decreasing the client's LOC |
| What med is used to reduce cerebral edema? | Corticosteroids |
| What med is used to control/prevent seizures? | Anticonvulsant drugs (AEDs) |
| What reduces the risk of stress ulcers? | H2 antagonists; decrease acid content of the stomach -High stress levels |
| What meds are used for nausea/vomiting? | Antiemetics -D/t intracranial pressure or tx required |
| Surgical interventions for a brain tumor: | Craniotomy |
| What is a craniotomy? | Complete or partial resection of brain tumor through surgical opening in the skull |
| Preoperative nursing actions for a craniotomy: -Support/education, aspirin, other meds, what should be completed? | -Have significant other or family member be present to hear questions/answers about surgery education -Discontinue aspirin 72hrs before -Doctor needs to know about other meds -Living will & DPOA should be completed |
| Postoperative nursing actions for a craniotomy: VS, pain, HOB, straining | VS & neuro closely monitor; glasgow scale -Tx pain -HOB ^ 30 & in a neutral position to prevent increased intracranial pressure -Straining (BM, moving up in bed) avoided to prevent ^ ICP |
| Greatest risks to a craniotomy? | Postop bleeding & seizures |
| Complications to brain tumors: | SIADH & DI |
| SIADH as a complication to a brain tumor | Fluid retained d/t overproduction of vasopressin (ADH) by the posterior pituitary gland -Hypothalamus damaged |
| How do you tx SIADH? | Fluid restriction, oral demeclocycline (Declomycin) -Tx hyponatremia |
| S/s of SIADH commonly seen: | Headache, vomit, disoriented |
| DI as a complication to a brain tumor | Large amounts of urine are excreted d/t a deficiency of ADH from the PP -Hypothalamus damaged |
| Tx of DI? | Massive fluid replacement, lab values, replace nutrients |