ACUTE NEUROLOGICAL REHABILITATION – AN ESSENTIAL PART OF THE CARE FOR A NEUROLOGICAL DISABILITY
Rehabilitation is a little known specialised field of medicine that focuses on intervention post-acute incident and works towards a global and holistic aim of improving quality of life and facilitating maximum initial inputs to ensure minimal ongoing complications or sequelae. This article explains the basics of the field, the involvement of various team members and the various models of rehabilitation. It focuses on the details of managing the specific medical challenges faced by the team post-neurological insult, and offers some outlines on the rehabilitation process.
WHAT IS REHABILITATION?
According to DeLisa, Currie and Martin (1998), “Rehabilitation is the process of helping a person to reach the fullest physical, psychological, social, vocational, avocational and educational potential consistent with his or her physiologic or anatomic impairment, environmental limitations and desires and life plans”2. Acute rehabilitation services make use of interdisciplinary teams in order to holistically address three levels of incapacity as a result of illness or injury to the physiological body. These three levels (according to the World Health Organisation’s “International Classification of Functioning, Disability and Health”) are:
For example, in the case of a patient who has sustained a stroke: the increased muscle tone and weakness of the affected limb can be described as the impairment. As a result of this impairment, the patient is unable to walk and is confined to a wheelchair, a loss of function which is termed his activity limitation. As a result of no longer being able to walk, the patient’s life participation restriction is that he is unable to resume his work as a physical labourer. It would be fair to say that although the impairment level would be the treatment focus in the traditional medical model, the patient (and his family) would be most distressed by the resultant activity limitation or life participation restrictions affecting his personal world. A true rehabilitation model aims to address the “whole-person function”, which requires the involvement of the patient, the family and the entire interdisciplinary team. It is important to note that rehabilitation cannot aim to “cure” all patients and return them to the exact previous level of functioning. Rather, it attempts to obtain maximal function in patients following an initial injury/illness. Where “normal” function cannot be regained, alternative and compensatory strategies are taught in order to be able to perform tasks previously achievable. When impairment is so severe as to lead to permanent disability, the aim is to reduce the burden of care for the family and caregivers, and to prevent secondary complications that could lead to further hospitalisations and life threatening conditions.
An interdisciplinary team in an acute rehabilitation unit usually consists of the following professionals:
· Medical/rehabilitation doctor
· Nursing team
· Occupational therapist
· Speech and language therapist
· Social Worker
· Case Manager
These professionals work closely with an extensive network of supporting services, including, inter alia, specialist doctors, outpatient therapists, vocational rehabilitation specialists, community counsellors and support groups, prosthetists, orthopaedic/equipment supply services, and disability associations.
The term “acute” refers to the fact that patients are usually referred to the rehabilitation service a short time after the illness or injury was sustained; the basic admitting criterion being that the patient has been medically stabilised and is in a condition to participate in an intensive therapy programme. The therapy programme is structured and graded around each individual’s abilities and needs, following clinical evaluation by each therapeutic professional. In order to benefit from the level of therapy on offer in the acute rehabilitation setting, the patient should be able to participate in and benefit from at least three modalities of intervention on offer. However, it is understood that patients in the early stages of rehabilitation may have limited levels of endurance in the initial stages of therapy and will receive shorter, more frequent sessions over a graded period of time. The length of time spent in individual therapy sessions will then be progressed as their tolerance increases. The rationale behind admitting patients into acute rehabilitation services as soon as possible after the initial neurological insult is multifactorial and includes considerations such as optimising the window period for new skills development based on the concepts of neural plasticity and cellular healing, as well as ensuring the timeous management of patients before the development of long term complications that can be detrimental to the rehabilitation process.
TYPES OF TREATMENT TEAMS:
Insert figure 1: The medical model
Insert figure 2: multidisciplinary model
Insert figure 3: interdisciplinary model
DEFINING ACUTE VS SUBACUTE REHABILITATION SERVICES
Insert Table 1: defining acute vs subacute rehabilitation
PREVENTION OF LONG TERM COMPLICATIONS
While the primary goal of rehabilitation is to restore maximal function (life participation level), the attainment of this goal necessitates the successful management of a number of issues at the impairment and activity limitation level which, left unattended, could result in long term complications. Failure to manage these potential complications could not only ultimately lead to a loss or reversal of the desired function, but could have far reaching consequences including sustained length of hospital stay, further hospitalisations after discharge and even death. A comprehensive rehabilitation programme aims to prevent these long term complications, through the successful management of the following (non-exhaustive) risks prevalent in patients suffering from acute neurological insults:
Spasticity and associated abnormalities of tone: Muscle tone is the resistance felt in a muscle as a limb is moved passively. Changes in muscle tone (either increased or decreased) are a common result of an upper motor neuron injury and are often accompanied by weakness and impaired motor control. If left unattended, these physiological changes can result in musculoskeletal changes such as abnormal ranges of joint motion and reduced muscle length, ultimately resulting in a loss of functional mobility. Treatment options include physical modalities such as passive movements, static muscle stretches, serial casting, weight bearing exercises, muscle cooling and electrical stimulation. Medical management includes the use of drugs such as Baclofen, Diazepam, Clonidine, Tizanidine, Methocarbamol, Dantrolene and chemical nerve blocks such as Botulinum Toxin. Our first line treatment of choice at present is Baclofen (Lioresal) in doses of up to 100mg daily (25mg q.i.d) orally. Where Baclofen alone fails to control the spasticity, one can consider adding various of the above mentioned agents. Patients who experience long term problems which cannot be controlled by oral medication, will often benefit from intrathecal baclofen pumps. Where loss of muscle/joint range is irreversible by any other method, surgical options such as tendon lengthening, tenotomy and tendon transfer may be considered.5
Pressure sores: A pressure sore is an area of unrelieved pressure over a defined area, usually over a bony prominence, resulting in ischaemia, cell death and tissue necrosis. In most cases, except where actual changes in skin viability are recorded as a result of the neurological injury (such as in the case of high cervical spinal cord lesions), pressure sores are a direct result of immobility and are such considered entirely preventable if correctly managed from the outset. Measures to prevent the development of pressure sores include frequent turning, regular and systematic skin inspection, correct positioning and appropriate support surfaces.6 Products used in the treatment of wounds include dressings such as Primapore, Opsite, Tegaderm, Acticoat, Biotane and Granuflex, as well as applications to promote healing such as Meladerm ointment. The application of these different options depends on the severity and nature of the wound.
Feeding complications and aspiration: Swallowing dysfunction is common in patients with neurological injuries, particularly in strokes, traumatic brain injuries and patients with progressive neurological disorders. Patients with a compromised swallowing mechanism may be unable to protect their airways when ingesting solids or liquids, which could result in life threatening aspiration pneumonias. Such patients need to be prevented from ingesting consistencies of food which may be harmful to them, while at the same time optimising their nutritional status through alternative strategies (such as naso-gastric or percutaneous endoscopic feeding). In some patients, the risk for aspiration may be decreased by changing the consistency of the foodstuff; for example, products such as “Thick and Easy” (Fresubin Kabi) are used to thicken liquids to the appropriate consistencies. Aspiration may be detected by the development of pulmonary infections or by the tendency of patients to cough following ingestion of food or fluid. However, “silent” aspiration is surprisingly frequent and can be deadly. The most appropriately trained professionals to assess and rehabilitate patients with swallowing disorders are speech and language therapists, in conjunction with dieticians. Where necessary, referral can be made to Ear, Nose and Throat specialists, or radiographic studies of the oropharynx, oesophagus and upper gastrointestinal tract can be ordered. In the event of the development of an aspiration pneumonia, aggressive and urgent intervention with antibiotic therapy is indicated. The role of the respiratory therapist is also invaluable in the treatment and prevention of chest infections as a result of aspiration.7
Chest infections: A significant complication of bed rest and immobility is the development of chest infections. Add to this the myriad of musculo-skeletal and patho-physiological changes that can occur as a result of neurological injury and it is obvious that the risks of patients developing respiratory dysfunctions are significant. Treatment or prevention involves early mobilisation, frequent respiratory toileting, adequate hydration and frequent position changes. Physiotherapeutic techniques include deep breathing and coughing exercises, chest percussion, postural drainage, the use of incentive spirometers and where necessary, oropharyngeal suctioning.7 Medication should only be commenced once the chest infection has been diagnosed based on positive clinical, radiological and laboratory test results. Appropriate antibiotic cover based on the outcome of sensitivity tests may then be instituted. The early addition of high doses of appropriate antibiotics, together with inhalation therapy (nebulisation), plays an integral role in ensuring a good outcome for these patients.
Venous thromboembolism: Immobility or the paralysis of a limb exposes a patient to venous stasis and increased blood coagulability, which could lead to the development of deep vein thrombosis (DVT) and the risk of thromboembolism. Signs and symptoms of DVTs include oedema, tenderness, hyperaemia and venous distention and can be confirmed most easily by Doppler studies. The most common means of preventing thromboembolic complications is to use low-dose subcutaneous injections of low-molecular weight Heparin, eg. enoxaparim sodium (Clexane) in doses of 0.5mg/kg/day prophylactically. Other preventative measures include external intermittent leg compression, elastic leg wrappings, active exercises and early mobilisation. Pulmonary embolus from venous thrombosis should be suspected in the presence of acute dyspnoea, tachypnea, tachycardia, chest pain, increased distress/restlessness and a cough with blood stained sputum. Following clinical examination and depending on the patient’s haemodynamic and respiratory stability, further investigations including a chest X-ray and VQ scan (which assesses ventilation and perfusion of the lungs) can be performed to confirm the clinical diagnosis. Appropriate anti-thrombotic therapy should then be instituted in a high care setting to monitor for any potential complications related to the anti-coagulation regime. Treatment of DVT and pulmonary embolism include low molecular weight Heparin in doses of 1mg/kg b.d., as well as Warfarin medication. Anticoagultion therapy is monitored by means of measuring INR levels. When the patient’s INR level reaches 2.0, the low molecular weight Heparin can be stopped. Warfarin therapy is continued until the DVT/pulmonary embolism has resolved. Continuous INR monitoring and dosing, in collaboration with a haematologist, are essential. 7
Neurogenic bladder and bowel dysfunction: Voiding dysfunctions are common in patients referred for rehabilitation. These voiding problems may result from medications, cognitive changes, physical impairments or neurological etiologies. These dysfunctions can cause enormous embarrassment to the patient and may ultimately make the difference between reintegration in to the community or total confinement at home. Left unresolved, these problems could lead to other medical complications and even death.8 Therapeutic interventions involve the introduction of specialised bladder and bowel programmes, which include the use of medicines as well as the adoption of numerous physical adaptive strategies. Where necessary, surgical treatment options are also available. In the event that a patient has a hyper-reflexic bladder, a urinary tract antispasmodic such as Oxybutynin or Tolterodine may be used to relax the bladder wall and allow for adequate bladder filling to occur before the patient performs intermittent self-catheterisation. An assessment of the contractility of the bladder wall and the sphincter pressures is therefore necessary before a decision is made about the self-catheterisation programme. This is done by means of a Urodynamic study (UDS). In order to establish a baseline for the future urological management of the patient and also to ascertain the status of the patient’s urological system anatomically, other tests including an Intravenous Pyelogram (IVP) and Voiding Cysto-Urethrogram (VCU) are important in the initial urological assessment. Treatment for a high pressure bladder includes Oxybutynin (Lenditro) 5mg, tds, Tolterodine (Detrusitol SR) 4mg daily and various other anti-cholinergic drugs.
Bowel programmes include the use of laxatives such as Depuran, Senekot and Dulcolax and medications such as Movicol, in combination with specialised diets and strict fluid regimes. Some patients have found programmes for the manual irrigation of the bowel, such as the Coloplast system, to be extremely successful in their bowel management programmes, but such patients need to be extensively educated regarding the signs of possible side effects from such programmes.
Autonomic Dysreflexia: Hypersensitivity and dysfunction of the autonomic nervous system as a result of cervical or high thoracic spinal cord injury can result in a hypertensive crisis requiring immediate emergency attention. It is often preventable, if the causes of the condition can be diagnosed and managed before a crisis develops. These causes include pneumonia, urinary tract infection, constipation or bowel obstruction, deep vein thrombosis, chest infection and sepsis. Symptoms of autonomic dysreflexia include fever, tachycardia, tachypnea, hypertension and pain.7 The medical management of this condition necessitates the immediate identification of the noxious stimulus which has triggered the autonomic outpouring, followed by removal of this stimulus, e.g. unblocking a kinked or blocked urinary catheter. The use of antihypertensive medication is reserved for cases where all possible causes have been excluded without any improvement in the patient’s blood pressure. The treatment of choice for the acute presentation of hypertension is Adalat (Nifedipine)10mg p.o. stat. These are high risk patients and should be managed as a medical emergency.
While the prevention of long term complications is inherent in the philosophy of the rehabilitation service, it is undeniably true that the entire efficacy of the rehabilitation programme can be influenced by the presence of one or more of the aforementioned complications upon admission. Immeasurable time and resources can be wasted on the management of medical complications, rather than focusing on the physical, functional and cognitive rehabilitation of the individual. The importance of the early identification and referral of suitable rehabilitation candidates, as well as the prevention of avoidable complications directly after the initial neurological insult, should be impressed upon all the medical practitioners involved from the first day of a patient’s admission to an acute hospital ward.
ACUTE REHABILITATION – CLINICAL PATHWAY
Insert Figures 4 – 7 – clinical rehabilitation pathways
ACUTE REHABILITATION SERVICES IN SOUTH AFRICA
Many of the private healthcare companies in South Africa run private rehabilitation services, utilising a variety of models and treatment intensities. There are services in most major centres in the country.
The state healthcare services also offer multidisciplinary rehabilitation services in the tertiary academic hospitals around the country, as well as some specialised service centres.
Despite services being available in both private and public service sectors, well coordinated and holistic rehabilitation services can still be challenging to locate and to access in our country. However, as awareness of the rehabilitation function is heightening, so the various services are expanding and growing. Significant development in the field has been demonstrated over the past ten years, and continues to do so.
While the acute rehabilitation service requires a specific structure to ensure the concordant integration of numerous therapeutic functions in order to maximise a patient’s rehabilitative outcome, it is only the first step in the individual’s recovery process following a neurological insult/injury. It affords patients and families their first opportunity to make some sort of sense out of their newly disordered worlds, within a secure and supportive environment. Economic implications should also be considered; the maximisation of functional outcome as well as the effective management of possible complications as a result of an effectively implemented rehabilitation process has a significant impact on the ultimate financial outlay of the patient, as well as funders and state medical systems. The rehabilitation process equips patients and their families with the basic physical, functional, cognitive and emotional skills that will form the foundation on which they will be able to rebuild their lives after discharge. Rehabilitation aims to provide a solid framework on which patients will be able to forge a number of new abilities which will be refined and developed over time. Referral to outpatient therapists, community support services and ongoing medical support functions is imperative if a rehabilitation programme is not to flounder once a patient is discharged from the acute inpatient environment. Rehabilitation should thus be viewed as a progressive and continuously evolving process, with numerous players on stage, but none more important than the patient at the heart of the production.
|ACUTE NEUROLOGICAL REHABILITATION – FIGURES|
|This document contains figures intended to accompany the article entitled 'ACUTE NEUROLOGICAL REHABILITATION' by Lauren Burns.|