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Institute of Medicine (US) and National Research Council (US) Committee on Trauma Research. Injury In America: A Continuing Public Health Problem. Washington (DC): National Academies Press (US); 1985.

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Injury In America: A Continuing Public Health Problem.

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6Rehabilitation

Rehabilitation is the process by which physical, sensory, and mental functional capacities are restored or developed after damage. In the context of injury control, rehabilitation is the process by which biologic, psychologic, and social functions are restored or developed to permit an injured person to achieve maximal personal autonomy and an independent noninstitutional lifestyle. Rehabilitation is achieved not only through functional change in the person (e.g., development of compensatory muscular strength, use of prosthetic limbs, and treatment of postinjury behavioral disturbances), but also through changes in the physical and social environment, such as reductions in architectural and attitudinal barriers that hamper those requiring use of a wheelchair.

In the last decade, improvements in emergency medical systems, in immediate management by trauma centers, and in care of the injured en route to hospitals have increased the survival of persons with nervous system injuries, multiple injuries of the musculoskeletal system and viscera, or extensive burns. Trauma units have increased the need for defined referral to special rehabilitation programs and follow-up services. More persons survive major injuries, and survivors often have severely disabling effects from the injuries themselves and from untreated complications. Many need functional restoration of cognition, sensation, movement control, and mobility after brain, spinal cord, and musculoskeletal injury. Further negative effects on health and performance in daily life that result from the loss of body parts and from inactivity and immobility must be prevented.

The increase in rate of survival after nervous system injury was a natural consequence of the merger of medical and allied interests, knowledge, and technologies developed during and after World War II. Experience with the early care and rehabilitation of persons with war injuries led to a new emphasis on the establishment of multidisciplinary centers like the spinal cord injury centers in Veterans' Administration hospitals. Specialists in physical medicine joined orthopedic surgeons in developing restorative and reconstructive surgery. They directed hospital units for rehabilitation. Free-standing and hospital-based civilian rehabilitation hospitals and centers promoted academic development by means of exemplary service, research, and training in medical rehabilitation, physical and occupational therapy, rehabilitation nursing, social work, speech therapy, psychologic services, orthotics and prosthetics, vocational counseling, and rehabilitation engineering. These specialized programs rapidly demonstrated the benefits and loss prevention possible through the use of organized restorative and rehabilitative care in controlling disability and maximizing use of residual capabilities.

Rehabilitation units found improved methods for amputations, prosthetics, and management of multiple musculoskeletal injuries and neurotrauma. Reconstructive surgical procedures evolved in orthopedic and plastic surgery for improved function and correction of deformities. Therapies of medical origin, physical and occupational therapies, and psychologic, social, vocational, and behavioral techniques were developed. Peer counseling of successfully rehabilitated persons promoted the use of restored functions in daily life, and that led to independent noninstitutional living. The increase in clinical experience with major burns and their continued occurrence in industrial and home settings promoted the development of regional burn centers.

With comprehensive care, the profound biologic, psychologic, and social responses to paralysis and movement disorders, disfigurement, and loss of body parts are controllable to a remarkable extent. Although limited resources for clinical programs have been provided through private and publicly supported efforts, parallel research and educational resources for the development and dissemination of knowledge and technology have been seriously inadequate. The development of expanded special regional centers and programs has been lacking for the large number of unserved persons who could benefit.

The evolution of needed basic and clinical research directed to clinical problems of rehabilitation and to the development and application of technologies for better mobility, environmental control, and replacement of sensory deficits has been supported at a rate of one-thousandth or less of the funding for research in curative medicine. The emphasis has been on investigator-oriented basic research, in contrast with program-oriented and center-based cross-disciplinary research by scientists, engineers, clinicians, and behavioral and social scientists to solve problems in and evaluate postinjury and rehabilitation care. Many important research questions and activities have been identified, but only a small fraction are fundable in traditional ways.

The use of effective methods and procedures for improving clinical care is not widespread. The technologies and methods of care available in trauma centers and rehabilitation centers are available to few victims. Failure to control the preventable consequences of injury through treatment and rehabilitation results in a needless yet major health care cost to society, as well as losses due to the effects of injury on the patient, on the family, and ultimately, as a public and socioeconomic burden, on all of us. Yet, for every dollar spent on rehabilitation several dollars are saved by state and federal governments.

Among persons severely disabled from all causes, including injury, approximately 1 in 10 of the newly disabled uses rehabilitation facilities. There are 15 regional spinal cord injury centers, and less than 10 percent of the 5,000-10,000 persons with new spinal cord injuries every year enter a system of care pioneered by these centers.223 Help to brain-injured persons is even less.

For example, in the greater Houston area of 3.5 million persons, with three major trauma centers, the incidence of new spinal cord injury is 50 per million of population, or 175 persons per year added to approximately 1,500 survivors on hand. There are 5 times as many brain-injured persons, or 875 new ones per year, with several thousand survivors estimated in the last decade.37 93 For the head-injured, there are only 45 organized "center" beds in two institutions, and fewer than 100 persons are admitted per year.133

Neurologic injury is probably the most costly kind of injury and produces a great need for more organized systems of acute, subacute, restorative, and rehabilitative care. As with burn care, such a system must build on specialized knowledge, skills, experience, and technology with continuity of service and follow-up. Rehabilitation and independent-living service can provide deinstitutionalization for more than three-fourths of the patients; the cost of this over a lifetime is estimated at one-tenth the cost of custodial care with repeated hospitalizations.120 133

The data base for the spinal cord injury center program among the 15 regional centers revealed that the intake and follow-up process saved one-third of first-cost dollars, achieved home placement in 85 percent of over 6,000 first admissions, and decreased the incidence of complications and later hospitalizations for complications.223 The relatively low incidence and prevalence of neurologic injuries, multiple musculoskeletal injuries, and burns fail to imply how important and costly the problems that result can be. In fact, this situation is the emerging important issue of injury. The social and economic impacts on the patient, the family, the community, and the state and nation are substantial. There are no aggregate statistics on the lifetime impact of these conditions. The problem has become more frequent and complex in the last 10 years, because survival with residual disability of the injured has increased. There is no mandatory reporting for even the occurrence of these conditions or the attendant disability, as there is for births, deaths, or even vehicle registration. We count expenditures as health care costs and transfer payments for disability. But we have failed to use losses prevented and costs decreased by improved care as factors in benefit-versus-cost estimates for rehabilitation.

Accounting must omit the intangible and the uncounted. Yet, the consequences are found in the fabric and activities of our family life, our productivity, and our community life and in the loss of pride in connection with the values we profess as a nation—independence, quality of life, and pursuit of the opportunity to be an equal member of society. Perhaps the implicit threat of disability, unlike the inevitability of death, is a hidden concern that causes us to turn our heads away from its possibility until it strikes us or one we know and love. Because of the current long-term survival with disability, we cannot afford to be unprepared to prevent the losses of function after injury.

Research Issues and Needs

Proper and enlightened management during pickup and delivery to trauma centers and during hospital care can profoundly reduce the extent of disability and prevent complications that would retard later rehabilitation. Therefore, rehabilitation of an injured patient and prevention of and early care for injuries pose inseparable questions for research policy. The goal of injury care should be not simply to achieve medical stabilization, but rather to minimize disabling effects and complications. The goal is not accomplished fully until the injured person achieves the maximal possible functional effectiveness in all aspects of life, including daily living, work, education, and recreation. Systems of care for patients with spinal cord injuries that coordinate management from the site of the injury through trauma center care, intensive rehabilitative treatment, and transitional services, to independent living are proving more humane and cost-effective than uncoordinated efforts.60 133 152

Too often, knowledge of effective rehabilitation goes unused. The following discussion illustrates the spectrum of issues and conditions that requires both research and the application of existing knowledge.

Musculoskeletal Injuries

Musculoskeletal injuries are among the most common injuries. Evaluations of causes of work disability indicate that, in persons 16-65 years old,185 musculoskeletal conditions are the predominant cause of loss of work and eligibility for social security disability benefits and unemployment compensation. Back disorders are most common, but serious musculoskeletal injuries are apt to prolong disability—fractures, amputations, and hand injuries. According to a recent document of the American Academy of Orthopedic Surgeons5 on current and future research needs, "approximately one of every eight beds in general hospitals in the United States is occupied by an accident victim, and injuries involving the musculoskeletal system are the most frequent sustained by that group of victims." These injuries include joint dislocations, extensive soft-tissue swelling, rupture of tendons, injuries to nerves, and damage to major blood vessels. This document further states: "Approximately sixteen million significant upper extremity injuries occur each year, which are responsible for ninety million days of restricted activity and sixteen million days of lost work." Similarly, injuries to the musculoskeletal system are the commonest injuries in athletics and sports recreation. Spinal cord injury associated with athletic and recreational activities accounted for 12 percent of 5,635 cases of spinal cord injury in which patients were rehabilitated in spinal cord injury centers from 1973 to 1981.223 Musculoskeletal and neurologic injuries of all types result in severe work disability (65 percent) in our working-age population (127.1 million persons in the United States in 1978). The other personal and family losses are inestimable, uncounted,185 but real.

Pathophysiology of Soft-Tissue Injury and Nerve Regeneration

Effects of soft-tissue trauma at the molecular and cellular levels overlap basic research on tissue injury described in Chapter 5. Studies on the pathophysiology of muscle, nerve, and microcirculatory (and lymphatic) systems during and after increases in tissue pressure are needed. Mechanisms of nerve regeneration and repair in the peripheral nervous system and the effect of electricity on nerve regeneration have been insufficiently studied.

Fracture Healing Processes

Fracture healing processes are not fully understood. Research is needed on injured bone with regard to the origin of the precursor cell of osteogenesis, the chemical nature of the bone-inducing substance (s), its mechanism of action, the organic matrix elements of bone, and the cellular control mechanisms of bone mineralization.

Fracture Nonunion

Nonunion, or failure of a fracture to heal, is a serious and disabling complication of fracture repair. Studies of causes and predisposing factors are needed, with evaluation of treatment. The usefulness of engineering techniques for prevention or treatment analysis, the effect of bioelectricity, and the development of biomaterials that could bridge nonunion sites and promote bone growth are important in restorative surgery and for restoration of function.

Microsurgical Techniques

Replantation of amputated parts and transplantation of vascularized and innervated muscle and bone flaps can be improved. Tissue perfusates and microvascular repair techniques that promote healing need to be identified.

Structural and Ultrastructural Anatomy

Efforts to identify the structural and ultrastructural anatomic details of bone, disk, ligaments, and joints of the spine need support. Measurements of motion in normal and injured states in all spinal segments and knowledge of muscular control of segmental motion are needed for a mathematical model to test effects of forces, loads, and supports.

Bioengineering and Biomaterials

Ideas and technologies are needed to predict the interaction of artificial materials and structures with natural biologic tissues—such as cortical bone, cancellous bone, and cartilage—so that the effects of metallic internal fixation devices, joint prostheses, etc., can be learned. Improved designs and fixation factors of prosthetic devices are needed. Studies are needed for measurement of real forces and motion patterns and for testing the strength and fatigue of prosthetic components. Use of theoretical modeling techniques should be explored to improve configuration, positioning, and interface characteristics of prosthetic implants.

Burns

Burns accounted for 100,000 hospitalizations in 1976, according to the only recent study (C. D. Herndon, personal communication). It was estimated that 50,000 persons per year were disabled because of burns.

In the opinion of physicians specializing in burn therapy, there have been few advances in treatment of inhalation injuries in the last 20 years (C. D. Herndon, personal communication; Michigan Burn Data Exchange Center, personal communication). Extensive rehabilitation is required of survivors of major burns to control contractures that limit, for example, useful hand and arm movements, facial expression, and intelligible speech. Therapy is needed to minimize scarring and thus permit mobilization of joints after surgery; disfigurement hinders social acceptance of the burn victim. Specialized resources for comprehensive burn treatment and rehabilitation were first established by the military, and more recently centers were established for children by the Shriners. Several tertiary referral hospitals with burn centers have added burn rehabilitation programs, as have some rehabilitation centers. An accessible rational system does not exist for all burn victims.

Many experts in this field consider research needs to be extensive and greatly underfunded. There have been very few rehabilitation-related research efforts. Most research has been related to grafting and debridement techniques and the management of acute injury. There is need for evaluation of alternative methods of management both immediately after injury and later.

Pathophysiology of Fire-Related Gas Inhalation

Basic and clinical research on the pathophysiology and treatment of pulmonary insufficiency and failure caused by inhalation of toxic fire-related gases—the greatest cause of death from fires—is urgently needed. Long-term pulmonary scarring and ventilatory insufficiency greatly affect exercise capacity and need to be minimized for effective rehabilitation.

Problems in Cutaneous Debridement and Replacement

Clinical research for comparative evaluation of long-term disabling effects of alternative methods of debridement—early and late and with different techniques to identify viable tissue in third-degree burns with early debridement of dead tissue—is important for successful grafting and control of extent of debridement and secondary infection. More research on technology for mass production of homologous skin-cell culture, etc., is needed.

Prevention and Control of Tissue Contractures and Hypertrophic Scarring

Comparative evaluation of methods for control of contracture formation—e.g., early splinting and pressure bandaging—is needed, as well as basic research on methods for inhibition of excessive collagen formation in scarring.

Disabling Pain

Disabling pain that retards activity, purposeful movements, and ambulation and that is occasioned by dressing changes, periodic debridement, reconstructive surgery, and grafting requires basic and clinical research on alternative methods of pain control, including electric stimulation of the spinal cord.

Psychosocial Research and Prosthetic Methods

There has been little research on the behavioral and social aspects of burn disfigurement with respect to patient reactions and effects on parents and siblings— e.g., the consequences for schooling and vocational opportunities. Children seem to adapt better than adults, but the reasons are not known. The role of facial and missing-part prostheses has not been evaluated on the basis of materials, cosmetic success, utility, etc.

Second Injury of the Spinal Cord

Second injury of the spinal cord after injury of the neck vertebrae is tragic, not uncommon, and preventable. Second injury can occur at the time of emergency pickup, during initial emergency hospital treatment and evaluation (e.g., during x-ray examinations), and even later, as a result of failure to recognize severe vertebral instability.

Major malpractice suit settlements often result from failure to prevent second injury. For example, in 1975 a judgment of approximately $1.5 million was awarded against a Veterans' Administration hospital for its involvement in causing second injury to a patient with neck instability after a motor-vehicle collision.55 That award equals approximately one-fifth of the entire 1984 Veterans' Administration budget for rehabilitation and engineering research.

Training

Training of ambulance and emergency medical technicians and emergency room staff and technicians can reduce the frequency of second injury.

Transportation

Devices for safer transport of neck-and-head-injured persons are being developed and need to be evaluated, produced, and distributed, but little or no funding is available.

Preservation of Spinal-Cord Function

Not all injured spinal cords believed to be completely severed are devoid of residual functional neurones and connections to higher levels of the brain and lower levels of the spinal cord. Recent clinical neurophysiologic research on 2,000 persons with spinal cord injuries has shown that nearly two-thirds of so-called complete injuries, in fact, are not complete.50 Involuntary-movement disorders like spasticity overlie and conceal residual voluntary-movement control and sensory functions. Even late disorders of the injured spinal cord, such as dissecting cystic swelling in the central cord, can be diagnosed early and treated surgically to limit further loss of function.

The scientific and intellectual effort required to ''cure'' spinal cord injury is akin to a total cure of cancer in scope and resource needs. It represents one end of the spectrum of research need. Waiting for a "cure" will leave millions of persons unable to achieve what human adaptive capacities make possible with proper rehabilitation, a less handicapping living environment, and an opportunity to recover personal autonomy through control of one's life. Both basic experimental research and clinical neurophysiologic studies of persons with brain and spinal cord injury reveal extraordinary adaptability of the brain. Recovery of lost motor control, control of abnormal central nervous system activity, and training for motor relearning through the use of other systems and pathways of the nervous system are all feasible to a degree—generally unrecognized and rarely facilitated. These become the new potential processes for improving basic human adaptability.

Preservation of Residual Function

Much research remains to be done on preservation of residual function and control of neurologic functional disturbances to regain bladder control and useful movement.

Nerve Regeneration

Basic animal research has already demonstrated some features of central nervous system regeneration. Tissue implants of peripheral nerves in the central nervous system show some potential for reconnection across surgically produced gaps in neural connections.

Pressure Sores

Failure to prevent pressure sores in the acute phase of injury or at any time during the course of disability creates misery, debilitation, and social and economic losses. This entirely preventable complication occurs in 35-40 percent of persons with spinal cord injury who have sensory and motor losses.223 It may develop in the first weeks after injury or later, even in young adults actively engaged in school, work, and recreation. It is very common among elderly bedridden persons in custodial care. The costs of hospitalization, surgical skin repair, and control of infection (which can proceed to chronic severe osteomyelitis, even requiring amputation) now average $25,000-$28,000 per pressure sore.102 An estimate of the direct costs in hospital and medical care is about $1.5 billion a year. The magnitude of loss of income due to prolonged and recurrent hospitalization is unknown, but is at least as much.

Management of Pressure Sores

More clinical research, development of care systems that use what is known, and augmentation of training are urgently needed.

Consequences of Injudicious Injury Care

The failure to anticipate and prevent a variety of metabolic, circulatory, respiratory, genitourinary, and musculoskeletal consequences of inactivity and immobility prolongs expensive care, delays active rehabilitation, and leads to failure to regain a state of health and preservation of residual functional capacity for purposeful activities. Injudicious timing of surgical intervention can augment postinjury stress responses and lead to such life-threatening complications as massive bleeding, uncontrollable infections, and respiratory insufficiency and failure.

Management of Sequelae

Research is needed on ways to protect residual neural tissue viability and to control serious complications that make rehabilitation difficult or impossible.

Conclusions

A national effort is needed to achieve appropriate emphasis on disability-related basic and applied research, technologic research and development, service systems, education and training, and social understanding. Great savings and increased quality of life would result from improved application of what is already known, but there is a need for substantial increases in research in many subjects. Table 6-1, at the end of the chapter, summarizes what is known and what is needed in rehabilitation research.

TABLE 6-1. Status of and Deficits in Rehabilitation-Related Research.

TABLE 6-1

Status of and Deficits in Rehabilitation-Related Research.

The prevention of disability provides some of the economic fuel for continued research on long-term approaches to minimizing the costs and losses incurred in disability. Social and economic losses due to injury-initiated disability and chronic medical care and institutionalization could be prevented, and that would yield funds for other health purposes. In addition, restructuring of the physical environment to reduce social and economic losses caused by failure to include handicapped persons of all ages in community life will help injury victims. Long-term institutionalization of able-bodied young adults who could be self-sufficient is the poorest possible solution, but it is the most frequent one today.

Recommendations

The following are some recommendations that, if implemented, would substantially reduce disability due to injury in this country. Not all are stated in the form of researchable questions, although many lend themselves to various kinds of research, demonstrations, evaluations, and increased use of existing knowledge. Research is not the sole solution to key issues in public policy needed for control of a problem as complex as comprehensive rehabilitation of injury victims.

1.

Major research centers should be developed for clinical neurophysiology programs on evaluation and management of neural injury residua, neural system function, and technologic replacement of lost function.

2.

Funding priority should be given to research on the identification and preservation of residual functions, development of substitute functions, psychosocial management of the patient and family, and deinstitutionalization.

3.

Research programs aimed at minimizing the effects of injury to the musculoskeletal system, including both bone and soft tissue, that result from physical, chemical, and thermal causes should be promoted.

4.

Research programs should be established in the behavioral and social sciences for cross-disciplinary studies of adaptive behavior and its relationship to brain function in environmental adjustment and learning.

5.

Wider application of existing knowledge related to rehabilitation and prevention of second injury is needed.

6.

Development and evaluation of model systems of rehabilitation should be promoted.

7.

Research should be greatly expanded on behavioral and social factors related to stigmatization of and discrimination against the disabled.

8.

A system is needed that can identify disabled persons and persons with injuries that are likely to produce severe disability, so that services for those who might benefit can be planned. Linked local, regional, and national reporting systems for the disabled are necessary to go beyond social security studies limited to work disability; these systems could be built into the surveillance system recommended in Chapter 2.

9.

Hospitals and physicians and surgeons managing injury cases should be provided with communication networks for reporting, obtaining information, and arranging triage, therapy, and referral.

10.

Professional education and experience should be revised to include familiarity with model trauma centers and comprehensive rehabilitation centers.

Copyright © National Academy of Sciences.
Bookshelf ID: NBK217492

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