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Biomedical subjects

R Savrin

Publications and source records attributed to R Savrin.

7 recordsLinked to original sources

Dermatome electrical stimulation as a therapeutic ambulatory aid for incomplete spinal cord injured patients.

Electrical stimulation of the L-3,4 dermatome during treadmill walking is proposed as a gait training modality in incomplete spinal cord injured patients. The dermatome stimulation proved to be efficient in diminishing the extensor tone occurring after loading of the paralyzed limb during the stance phase of walking and resulting in improved flexion of the leg during the swing phase.

Cervical Vertebrae↗

Improvement in step clearance via calf muscle stimulation.

The aim is to study the influence of electrically stimulated calf muscles on the effectiveness of the swinging leg movement. The study is carried out with a group of patients with incomplete spinal cord injuries both under stationary conditions and during crutch-assisted walking. Before stimulation is applied to the ankle plantar flexors, the knee extensors are inactivated. In each cycle, after ankle plantar flexor stimulation, peroneal stimulation is started, triggering the flexion reflex. From a biomechanical point of view, functional electrical stimulation (FES) of the ankle plantar flexors results in increased ground clearance of the lower extremity. Additionally, the FES-assisted lifting of the heel results in the elimination of extensor tone and thus shortens the swing time.

Adolescent↗

Effects of respiratory muscle training and electrical stimulation of abdominal muscles on respiratory capabilities in tetraplegic patients.

Thirteen tetraplegic patients were included in the study of the effects of respiratory muscle training and of electrical stimulation of the abdominal muscles on their respiratory capabilities. Each patient was subjected for three 1 month lasting periods of the study: for inspiratory muscle training, expiratory muscle training and for a period without training. The sequence of these three periods was random for each patient. Respiratory tests (RT) measuring forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) were conducted before and following each monthly period. Measurements were taken under four sets of conditions: the patients' unassisted efforts, their efforts combined with pressure manually applied by a therapist to the upper part of their abdomen, and their efforts accompanied by electrical stimulation (ES) of the abdominal muscles during the early phase of expirium, once triggered by the therapist and once by the patients themselves. RT values were increasing following respiratory muscle training and inspiratory training apparently had a slightly greater effect than its expiratory counterpart. The increments of values of RT were statistically significant (P < 0.05) after the inspiratory muscle training. RT measurements were greater when the patient's voluntary effort was combined with ES of abdominal muscles than when it was not. This study concludes that respiratory muscle training is a potentially effective approach and that ES of the abdominal muscles has potentials to improve coughing in tetraplegic patients.

Abdominal Muscles↗

Influence of electrically stimulated ankle plantar flexors on the swinging leg.

The influence of functional electrically stimulated ankle plantar flexors on the swinging lower extremity was studied in incomplete spinal cord injured persons. Stimulation sequences with different time and frequency parameters were delivered to ankle plantar flexors and knee extensors and to the peroneal nerve. The results of kinematic assessment showed that stimulated calf muscles provide noticeable forward and upward propulsion to the swinging leg.

Adolescent↗

Gastroschisis update.

Sixty-four infants with gastroschisis have been managed in the 9-yr period, 1970-1979, with four postoperative deaths. The silo technique has been the standard method of management in this series, permitting initial expansion of the abdominal cavity without increased abdominal pressure and respiratory embarassment. Removal of the silo and complete closure of the abdominal wall deficit were possible 5-12 days later. A high proportion of the infants were below 2500 g in weight at birth (61%); and although 3 of the 4 postoperative deaths occurred in the low birth weight group, this did not appear to be a factor in mortality. Associated anomalies occurred in 25 of the 64, but only the coincident intestinal atresias (6) were of major significance. These additional anomalies were not responsible for deaths. Two deaths occurred from problems dating from birth, one from aspiration and the second from sepsis. The other two resulted from postoperative complications resulting in infarction of the midgut. Both were caused in part by failure to adequately enlarge the abdominal wall defect at the time of the initial procedure. Other postoperative complications were relatively few. Although all required intravenous nutritional support, the long term results in terms of growth and development and of intestinal function were quite satisfactory.

Abdominal Muscles↗

Consumption coagulopathy associated with arterial aneurysms.

Consumption coagulopathy resulting from arterial aneurysm is an uncommon entity. Two patients, one with a femoral artery aneurysm and one with an abdominal aortic aneurysm containing fresh blood clot associated with a coagulopathy are presented. Reasonable preoperative control of the bleeding disorder with appropriate blood products followed by aneurysmectomy is recommended. Except to treat severe bleeding disorders associated with arterial aneurysms, heparin therapy is rarely necessary, as spontaneous reversal of the coagulopathy usually occurs. A high index of suspicion for the presence of an underlying arterial aneurysm as the cause for the consumption coagulopathy is necessary when no other etiology is obvious.

Aged↗