Assessment of Central Nervous System and Low Back Pain 1 Dr Ibraheem Bashayreh, RN, PhD 4/1/2011 MEDICAL SURGICAL NURSING NERVOUS SYSTEM Controls and integrates sensory, motor, and autonomic functions Maintains internal homeostasis Enables connection and response to external environment NEURON Working cell of the nervous system Carries impulses Sensory (afferent) Motor (efferent) Neurotransmitters (chemicals) Facilitate or hinder impulse transmission across synapse A NEURON. CENTRAL NERVOUS SYSTEM Brain Spinal cord BRAIN Control center of the nervous system THE FOUR MAJOR REGIONS OF THE BRAIN WITH AN ILLUSTRATION OF THE MENINGES. BRAIN Cerebrum; sensation, movement Left hemisphere; speech, problem solving, reasoning, calculations Right hemisphere; visual, spatial abilities (relating to the position, area and size of things), Face recognition, Visual imagery and Music BRAIN Diencephalon Thalamus; sensory relay Hypothalamus; regulatory center Brainstem: vital centers Cerebellum Involuntary muscle activity; fine motor Balance and posture SPINAL CORD Spinal tracts Sensory and motor messages White matter and gray matter PERIPHERAL NERVOUS SYSTEM Cranial nerves Spinal nerves Somatic nervous system Autonomic nervous system Sympathetic Parasympathetic PERIPHERAL NERVOUS SYSTEM Link between CNS and the body Spinal nerves 31 pairs Sensory and motor fibers Involved in reflexes/reflex arc DISTRIBUTION OF SPINAL NERVES. CRANIAL NERVES Cell bodies in brain/brainstem Sensory function, motor function, or both Mainly control head and neck functions AUTONOMIC NERVOUS SYSTEM Maintains internal homeostasis Two divisions Sympathetic: “flight or fight” Parasympathetic: “rest and digest” NEUROLOGIC ASSESSMENT LOC always assessed first Altered LOC leads to inaccuracies Determine alternate sources of information Family, caregivers, health care professionals ASSESSMENT Subjective Past medical history Actual neurologic disorders/family history Medication use Symptom history; include pain assessment Social/environmental data ASSESSMENT Subjective Motor: loss of movement; altered balance, coordination Sensory: numbness, tingling, sight, touch Cognitive: memory, speech, intellect, mood ASSESSMENT Subjective Eye PMH/family history related to the vision Changes in vision; use of corrective lenses; irritation Ear PMH/family history related to hearing Changes in hearing; tinnitus drainage Use of hearing aids ASSESSMENT Objective General survey Appearance, gait, balance, posture Vital signs Cranial nerve assessment ASSESSMENT Objective Cognitive functioning Sensory functioning Sight, sounds, touch Motor functioning LOC, mental status, mood Muscle strength, tone symmetry Reflexes ASSESSMENT Objective Eye Snellen, Rossenbaum charts Inspection Ear Rinne, Webber, whisper tests Inspection EXPECTED ALTERATIONS RELATED TO AGING Slower movement and reflexes Forgetfulness Changes in sleep patterns Changes in motor skills EXPECTED ALTERATIONS RELATED TO AGING Ptosis Presbyopia Decreased tear production Changes in eyelids Hearing difficulties Increased production of cerumen UNEXPECTED ALTERATIONS RELATED TO AGING Significant changes in Long/short-term memory Mental status Coordination/motor skills Speech Pain perception Sleep UNEXPECTED ALTERATIONS RELATED TO AGING Significant changes in Orientation Psychologic status LABORATORY TEST Electrolytes Complete blood count Liver function tests Renal panel Arterial blood gases Cultures Urinalysis IMAGING STUDIES All radiographic studies Allergy assessment—shellfish/iodine Hydration, renal function Pregnancy concerns Client teaching about procedure IMAGING STUDIES Skull/spine x-rays Client teaching/explanation MRI Assess for implanted metal Client teaching: enclosed space; noise The implants that are most prone to causing problems for patients with MRIs are the following: * Pacemakers or heart valves * Metal implants in a patient's brain * Metal implants in a patient's eye or ears * Infusion catheters IMAGING STUDIES CT scan ID shellfish/iodine allergy Assess disorientation Medicate for agitation Teach: warm sensation with contrast IMAGING STUDIES Cerebral angiography NPO prior Flushing with contrast media Close neurologic/VS monitoring post Pressure dressing/ice Report bleeding/swelling at site STAT IMAGING STUDIES Myelography Post: elevate HOB, bed rest Close neurologic/VS monitoring Report leakage/bleeding at site STAT IMAGING STUDIES Positron emission tomography (PET): is a nuclear medicine imaging technique which produces a three-dimensional image or picture of functional processes in the body. NPO 4 hours prior IV start Post: hydration Carotid duplex ELECTROGRAPHIC STUDIES EEG, evoked potentials Wash hair prior Electromyography (EMG) :involves testing the electrical activity of muscles Discomfort with needle insertion VISION TESTS Fluorescein stain Visual fields Tiring Facial x-rays/CT scan Potential stinging; staining not permanent Explain procedure Ultrasound Cornea anesthetized HEARING TESTS Audiometry X-ray/CT scan Explain procedure Explain procedure Caloric Testing (Electronystagmography) Post assessment; vomiting Aspiration precautions 4/01/2011 LOW BACK PAIN Dr Ibraheem Bashayreh, RN, PhD 37 EPIDEMIOLOGY of adults will experience LBP at some point in their lives 5th most common cause of all physician visits Peak incidence 20-40 years old; More severe in older patients 85% of patients have no definitive anatomic cause or imaging finding Most cases are self limited with serious problems in < 5% Most common cause of work-related disability for individuals < 45 years old 4/01/2011 75% 38 ANATOMY REVIEW 4/01/2011 39 Normal Anatomy of the Functional Spinal Unit (L4-5) and Associated Neural Structures 4/01/2011 40 Rathmell, J. P. JAMA 2008;299:2066-2077. LBP: RISK FACTORS lifting and twisting Obesity Poor physical fitness/conditioning History of low back trauma Psychiatric history(chronic LBP) 4/01/2011 Heavy 41 LBP CLASSIFICATION Etiologic Mechanical Non-Mechanical Visceral 4/01/2011 Temporal Acute Chronic 42 MECHANICAL LBP/LEG PAIN ETIOLOGIES (97%) usually attributable to musculoligamentous injuries or age-related degenerative disease in intervertebral disks and facet joints Lumbar strain (70%) Degenerative disk and facets (10%) Herniated disk (4%) Spinal Stenosis (3%) Osteoporotic compression fracture (4%) Traumatic fracture (<1%) Congenital disease (<1%) Kyphosis Scoliosis 4/01/2011 43 NON MECHANICAL LBP ETIOLOGIES (1%) Inflamatory, infectious our systemic disease effecting vertebral musculoskeletal structures Neoplasia (0.7%) Infection (<0.01%) Multiple myeloma Metastatic carcinoma Lymphoma / Leukemia Spinal cord tumors Primary vertebral tumors 4/01/2011 Osteomyelits Septic diskitis Epidural abcess Inflammatory arthritis (0.3%) Ankylosing spondylitis Psoriatic spondylitis Reiter’s syndrome Inflammatory bowel disease 44 spondylitis is a chronic, inflammatory arthritis and autoimmune disease. It mainly affects joints in the spine eventual fusion of the spin syndrome is a chronic form of inflammatory arthritis three conditions are combined: arthritis; inflammation of the eyes (conjunctivitis); and inflammation of the genital, urinary or gastrointestinal systems. 4/01/2011 Ankylosing Reiter's 45 VISCERAL DISEASE INDUCED LBP: ETIOLOGIES (2%) Process involving anatomic site other that vertebral musculoskeletal structures Disease of pelvic organs 4/01/2011 Prostatitis Endometriosis Chronic Pelvic Inflammatory Disease Renal disease Nephrolithiasis Pyelonephritis Perinephric abcess Aortic aneurysm Gastrointestinal disease Pancreatitis Cholecystitis Penetrating ulcer 46 MECHANICAL LBP DIFFERENTIAL DIAGNOSIS : CLINICAL FEATURES Herniated disk Usually occurs in adults aged 30 to 55 years Sciatica, often associated with leg numbness or paresthesias, is a highly sensitive (95%) and specific (88%) finding for herniated disk Exacerbation of pain may occur with 4/01/2011 coughing sneezing Valsalva maneuvers : is performed by moderately forceful attempted exhalation against a closed airway, usually done by closing one's mouth and pinching one's nose shut Spinal Stenosis usually occurs in older adults characterized by neurogenic claudication (impairment in walking, or a "painful, aching, cramping, uncomfortable, or tired feeling in the legs that occurs during walking and is relieved by rest) radiating back pain and lower extremity numbness exacerbated by walking and spinal extension improved by sitting 47 LOW BACK PAIN CLASSIFICATION (TEMPORAL) Acute Low Back Pain 4/01/2011 < 6 week duration Chronic Low Back Pain > 6 week duration 48 ACUTE LBP History Time-course of onset (associated activity; time of day) Pain Location (site, radiation) Nature (sharp, throbbing, dull, etc.) Severity Aggravating/relieving factors Prior injuries Age 4/01/2011 49 ACUTE LOW BACK PAIN Three clinical groups of Acute LBP Symptoms of potentially serious spinal condition (tumor, infection, fracture) Sciatica (discomfort radiating to legs) Nonspecific back symptoms (most common is strain of soft tissue elements) 4/01/2011 50 CLINICAL ASSESSMENT ACUTE LBP Neurologic sensation, muscle strength(dorsiflexion of foot and great toe) Peripheral pulses Stance and gait Flexibility Focal tenderness Straight leg raise 4/01/2011 Physical Exam Should be comprehensive, but focus on: Non-physiologic symptoms consider depression, mental illness 51 CLINICAL ASSESSMENT OF PERSISTENT (CHRONIC) LBP History Additionally consider History of cancer Age > 50 (malignancy, osteoporotic fracture) Recent unexplained weight loss (underlying malignancy) Recent IV drug use (Osteomyelits, Septic diskitis,Paraspinous or Epidural abcess) Presence of chronic infection (as above) Prior treatments and their effectiveness Pain unrelieved with positional changesconsider infection, cancer (not specific, 52 however) 4/01/2011 CLINICAL ASSESSMENT OF ETIOLOGY Systemic Inflammatory Infectious Neoplastic Severe mechanical injury 4/01/2011 Is this likely to represent a serious illness? 53 Clinical Assessment of Etiology Risk factors Major trauma: Corticosteroid use: Greater risk for underlying malignancy Unexplained weight loss: Greater risk for malignancy, osteoporotic fracture History of cancer: Greater risk for osteoporotic fracture Age >50 y: Possible fracture 4/01/2011 Greater risk for malignancy or infection Fever, immunosuppression, immunodeficiency, injection 54 drug use, or active infection: Risk for spinal infection CLINICAL ASSESSMENT: PSYCHOSOCIAL 4/01/2011 Are there complicating psychosocial factors that may impede treatment or prolong pain and predict poor outcomes? history of failed treatment, depression, and somatization (a psychiatric diagnosis applied to patients who persistently complain of varied physical symptoms that have no identifiable physical origin). Substance abuse, job dissatisfaction ongoing litigation or compensation claims 55 WHEN TO USE RADIOLOGY? 4/01/2011 Age >50 years Recent significant trauma Neurologic deficits Systemic symptoms Fever Unexplained weight loss History of cancer, substance abuse, chronic corticosteroid use 56 TREATMENT LBP Superficial heat, deep heat, cold packs NSAIDs mainstay, narcotics only if severe pain and only for short duration Reevaluate treatment after 4 weeks 90% get better within 4 weeks Physical Therapy Persistent 4/01/2011 Acute LBP Intensive exercise (poor compliance) Treatment of concomitant mental illness if present Patient education Referral to pain center (combination of modalities) 57 INTERVENTIONAL PAIN THERAPIES Corticosteriod Injection Facet injection Intrathecal Analgesia 4/01/2011 Epidural Chronic refractory non-cancer pain Limited quality of evidence (observational) Should be reserved for patients refractory to other interventions Intradiskal Electrothermal Therapy 39% of Chronic LBP diskogenic Thermal sensory nerve ablation 58 INDICATIONS FOR SURGERY Primary indication: Severe or increasing neurologic deficit 4/01/2011 Sciatica and herniated disk Spinal stenosis Spondylolysthesis Spinal stenosis symptoms Severe, persistent pain or sciatica for 12 months or more 59 PREVENTION STRATEGIES and strengthening exercises Weight loss? Smoking cessation? Improvement of strenuous and stressful working conditions Back braces are ineffective in prevention 4/01/2011 Exercise 60 4/01/2011 61 4/01/2011 62 SITTING POSTURE 4/01/2011 When sitting in any position, the three back curves need to be maintained. If you cannot sit without slouching forward or backward, you need to support yourself with hands and arms or lean against a wall or chair back. 63 SITTING POSTURE 4/01/2011 64 SITTING POSTURE: 4/01/2011 65 4/01/2011 LYING POSTURE: Avoid propping head or upper body up on an arm and hand. Head should remain relaxed. Legs should be together. 66 4/01/2011 67