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Biomedical subjects

R S Ward

Publications and source records attributed to R S Ward.

At least 19 recordsLinked to original sources
PubMed1992

Influence of pressure supports on joint range of motion.

Burn patients often complain of restricted mobility following application of elasticized nylon anti-burn-scar supports. This study was designed to analyse the influence of this type of pressure garment on joint range of motion (ROM). Data were compiled from 80 burn-affected joints of 17 burn patients placed in a support for the first time. Joint ROM was measured directly prior to, and again immediately following, the donning of the pressure support. ROM was measured using standard goniometric techniques. Range of motion increased in 26 joints (32.5 per cent), decreased in 26 joints (32.5 per cent) and showed no change in 28 joints (35 per cent) after application of the pressure garment. There were no correlations between ROM results and age, time postburn and per cent TBSA in this population. Patients were also asked if movement felt any different after the support was applied. Their varied comments, such as movement felt easier or more difficult, were consistent with the actual ROM data. It appears that there is no predictably detrimental change in joint ROM due to the application of pressure garments.

Adult↗
PubMed1990

Rehabilitation of burn patients with concomitant limb amputation: case reports.

Burn patients with associated limb amputations present demanding rehabilitation problems, many of which might be expected to lead to chronic difficulties. Therapeutic goals following limb amputation include oedema reduction, prevention of contracture (through positioning and range of motion), stump shaping, both pre- and post-prosthetic fitting strengthening exercises of the limb and trunk, and gait training. Some patients present problems that are associated with both the burn injury and the limb amputation that cause concern among the physical therapy staff. Some of these situations include intolerance of the stump to pressure or manipulation due to remaining open wounds or fragility of newly skin grafted areas on the residual limb or delayed gait or functional training due to wounds on other body surface areas. Delays in stump preparation or other treatment aims due to continued surgical procedures can be worrisome. A review of these patients indicates the possible difficulties that rehabilitation personnel may face when treating burn victims who required amputation. Effective rehabilitation of these patients can be achieved despite the noted concerns.

Adult↗
PubMed1989

A comparison of two crisis housing alternatives to psychiatric hospitalization.

This study compared outcomes for demographically matched clients four months after their admission to two short-term crisis programs. The programs provided crisis housing and case management services as alternatives to psychiatric hospitalization for clients with severe and persistent mental illness. One program met housing needs by purchasing shelter in hotels and boarding houses, and the other provided lodging in an eight-bed crisis house. In both programs, two-thirds of the clients avoided hospitalization during four-month follow-up, and both programs were effective in stabilizing clients' housing and financial situations. Clients in the purchase-of-housing program showed an increase in substance abuse problems at follow-up. Average client costs were similar in the two programs. A critical program difference was the substantially higher staff turnover in the crisis house, which was later replaced with scattered-site crisis housing.

Adult↗
PubMed1988

Assertive case management in three CMHCs: a controlled study.

At three community mental health centers (CMHCs) in Indiana, 167 clients at risk for rehospitalization were randomly assigned to experimental groups receiving assertive case management (ACM) or to control groups eligible to receive all other aftercare services at the centers. During a six-month follow-up period, experimental clients received an average of one visit a week from the ACM team, usually in the client's home or in community settings. Overall, ACM clients were rehospitalized an average of 9.2 days, significantly less than the 30.8 days for controls. In two of the three centers, significant rehospitalization differences were also found between ACM and control groups. No differences were found between groups in quality of life, medication compliance, involvement in CMHC programs, or contacts with the legal system in any of the centers. The most cost-effective center had savings of about +5,500 for each ACM client.

Adult↗
PubMed1988

In vivo evaluations of a new thromboresistant polyurethane for artificial heart blood pumps.

To reduce the risk of thromboembolic complications in prosthetic blood pumps, we have developed a new segmented polyurethane elastomer. This material is unique because its mechanical properties for long-term durability and surface properties for biocompatibility have been separated and developed in two distinct materials. Improved thromboresistance is then obtained by a 1% concentration of a new polymeric surface-modifying additive blended with the base polyurethane before fabrication of the blood pump. To evaluate this material in vivo, we performed 10 implants, in calves, of the Pierce-Donachy prosthetic ventricle with blood-pumping sacs and cannulas fabricated from the new surface-modifying additive copolymer blend (Thoratec's BPS-215M). In four control implants the blood sacs and cannulas were fabricated from Ethicon's Biomer segmented polyurethane, which is the present clinical standard for most artificial hearts and circulatory support devices. The blood pumps were connected from the apex of the left ventricle to the descending aorta in male Holstein calves weighing 82 to 108 kg and were driven pneumatically in the full-to-empty mode with flows averaging 5 to 6 L/min. Each calf was medicated with aspirin and dipyridamole throughout the study period and was electively put to death after 4 weeks for evaluation of explanted blood sacs and for examination of the kidneys for infarction. All 10 explanted blood sacs made with the surface-modifying additive copolymer blend were shiny and completely free of thrombus. Three of the four explanted Biomer blood sacs showed visible red thrombus, and all four showed small areas of white thrombus. The average surface area of the Biomer blood sacs covered with thrombus was 45 +/- 32 mm2. Use of a semiquantitative scale to assess renal infarction demonstrated that nine of 10 animals with a surface-modifying additive copolymer blend blood sac had infarction less severe than the mean infarct score of the animals with a Biomer sac. The surface-modifying additive copolymer blend has excellent mechanical and physical properties necessary for use in artificial heart blood pumps. From these experiments, we conclude that the surface-modified polyurethane blend is superior to Biomer polyurethane in blood compatibility and in freedom from thromboembolic risk. This material is now approved by the Food and Drug Administration for investigational device exemption studies in the Pierce-Donachy prosthetic ventricle.

Animals↗
PubMed1977

Development of blood-compatible elastomers. V. Surface structure and blood compatibility of avcothane elastomers.

The Avcothane 51 elastomer, a member of a series of proprietary materials best characterized as polyurethane/poly(dialkylsiloxane) block copolymers, displays considerable hemocompatibility without any incorporated anticoagulants. In the form of intra-aortic balloons, the elastomer was implanted in several thousands of cardiac patients without intolerable hematologic effects. Hemocompatibility has been assumed to result from a predominantly dispersion-type surface force field whose intensity fluctuates within small domains, maintaning adsorbed blood proteins in an unstable state. The relative hemocompatibility of films, which were obtained from a prepolymer solution cast on substrates impenetrable to the solvent, is a function of the effective surface molecular structure. This can vary as a function of preparative conditions (temperature and rate of evaporation), and has been correlated with an anisotropic distribution of the silicone component in cured films. The concentration of this component in surface layers was quantified independently by IRATR spectroscopy and electron-microprobe analysis, giving consistent results. An IRATR index, which is computed from the ratio of absorptivities measured at 13.00 and 12.62 mu and is inversely proportional to the relative silicone content of surface layers, was found to correlate with the apparent hemocompatibility determined by different in vitro methods. Optimized reproducible hemocompatibility is attained by strict process controls.

Assisted Circulation↗
PubMedDate not supplied

PT/OT abstracts needed.

Explore the source record for details and available documents.

Abstracting and Indexing↗
PubMedDate not supplied

Have you tried the sandwich splint? A method of preventing hand deformities in children.

The prevention of contractures of the burned hand is an arduous problem in the young pediatric burn patient. Difficulty in applying splints, along with the time-consuming fabrication of complex splints, led to the development of the "sandwich" splint. This easily produced splint provides a means of preventing and treating hand deformities in this patient age group. Positive results have been noted with the use of this splint in conjunction with the patient's usual active physical therapy program.

Burns↗
PubMedDate not supplied

Sensory loss over grafted areas in patients with burns.

We studied loss of cutaneous sensibility after grafting in 60 patients with burns who had applied for impairment assessment. Fifty-eight patients (97%) demonstrated markedly diminished or absent responses to sharp/dull, hot/cold, and light touch stimuli over grafted areas. However, all but one patient had intact perception over donor areas and over areas of healed (ungrafted) partial-thickness burns. Deep touch sensation was intact over both grafted and ungrafted areas in all patients. Loss of sensation was not related to patient age, burn size, or type of burn; nor did sensory loss correlate with the impairment rating received. Depth of burn injury appears to be the best predictor of altered sensation, and some abnormalities in patients appear inevitable after skin grafting. Patients should be counseled about possible outcomes. However, the decrease in sensation that was observed rarely contributed significantly to the long-term impairment rating of these burn victims.

Adult↗
PubMedDate not supplied

Prosthetic use in patients with burns and associated limb amputations.

A review of 11 patients who sustained burns that were complicated by limb amputation was completed to determine their eventual ability to use prosthesis. Amputations included six below-elbow, four above-elbow, three below-knee, and three above-knee amputations. Ten of the 11 patients (91%) had open wounds on the stump limbs and nine patients (82%) required skin grafting procedures on the amputated limbs. Delays in prosthetic fitting because of continued surgeries, open wounds, skin grafts on the stump limb, and breakdown of the stump were identified. However, eight of these patients (73%) were eventually able to wear prosthetic devices. Fisher's exact test was used to test the influence of the number and site of the amputations and skin grafting on the stump on successful prosthesis use. None of these tested items were found to be significant. The results demonstrate that most patients with burns who require limb amputation can achieve successful prosthesis use.

Adult↗
PubMedDate not supplied

Grease burns at fast-food restaurants. Adolescents at risk.

Intermountain Burn Center and Utah State Insurance Fund industrial records were reviewed to determine the incidence and consequences of grease burns among teenagers employed at fast-food restaurants. Burn center records reveal that 10 patients were admitted between 1977 and 1985, and that nine patients required surgery with mean burn care costs of $7389 per patient. State Insurance Fund records demonstrate that 81 grease-burn injuries were reported from 1982 through 1985, at an average burn care cost of $660 per patient. Causes of burn wounds included adding, filtering, or removing hot grease, dropping objects into hot grease, slipping on the floor, cleaning the grill or fryer, and splashing hot grease during cooking. Those treated as outpatients were off from work for as long as 10 days. These data identify an adolescent population at risk for work-related burn injury in fast-food restaurants.

Accidents, Occupational↗
PubMedDate not supplied

Pressure therapy for the control of hypertrophic scar formation after burn injury. A history and review.

Devastating functional problems can result from the formation of hypertrophic scar tissue after burn injury. Although a patient with burns may have several medical problems to contend with because of the injury, most ongoing rehabilitation difficulties are a consequence of the continual wound contraction that occurs in immature burn scars. Treatment of hypertrophic burn scar consists of several surgical options and of pressure therapy, which traditionally involves wearing garments made from elasticized fabric. This article reviews the treatment of hypertrophic scar tissue, with emphasis on its history and on nonsurgical methods of managing the burn scar.

Burns↗
PubMedDate not supplied

A technique for control of hypertrophic scarring in the central region of the face.

Various methods are available for applying pressure to the central portion of the face to reduce hypertrophic scarring after burn injury. Our center uses an elastomer insert with a thermoplastic backing, which is formed over a plaster mold of the patient's face. The insert is worn under a traditional anti-burn scar face mask. We reviewed the records of 26 patients with hypertrophic scarring to the central portion of the face to assess the effectiveness of the insert. Seventeen (65%) of these patients wore the insert until scar maturation. Three of these 17 patients later required reconstructive surgery of the central face. Our findings suggest that pressure to this part of the face may be effective in decreasing hypertrophic scar formation. The insert described in this article is inexpensive and relatively easy to fabricate.

Burns↗
PubMedDate not supplied

Quantitative threshold changes in cutaneous sensation of patients with burns.

Decreased cutaneous sensation is common after burn injury. This study was designed to quantitate threshold sensory loss with the use of a microcomputer-based sensory testing device that generated precisely controlled stimuli. Threshold evaluations of two-point discrimination, pinprick, warming, touch, and vibration were performed on patients with burns (n = 16) and on control subjects (n = 42). All threshold measures in patients with burns were elevated above those for control subjects; threshold measures that reached statistical significance were two-point discrimination, warming, touch, and vibration. Unburned sites on patients with burns had higher thresholds than sites on control subjects, though only vibration was significant. A significant correlation was found between the magnitude of touch and vibration thresholds in control subjects, but there was no similar correlation found in patients with burns. When controls for age were applied, touch and vibration thresholds remained significantly elevated above control levels, and decreases in significance for two-point discrimination and warming were noted. It was concluded that sensory function is reduced in patients with burns. Alternative mechanisms that may have caused the sensory changes were discussed.

Adult↗