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Biomedical subjects

V Berg

Publications and source records attributed to V Berg.

36 records · Page 2Linked to original sources
PubMed1989

Hip motion related to age and sex.

In a selected population 4 years old to adult age, 1,522 hips in 761 healthy subjects of both sexes were studied. Arcs of passive motion of the hip were measured by the technique recommended by the American Academy of Orthopaedic Surgeons. The lower and upper limits of normal range of hip motion in all the planes were established for both sexes in the different age groups. We found that the amplitude of most hip motions decreased with age. Females had higher ranges of total hip motion, total rotation, internal rotation, and abduction compared with males.

Adult↗
PubMed1984

Possible mechanism of hemostasis effected by electrocoagulation.

Forty acute gastric ulcers were created in 10 rabbits. The bleeding was controlled by monopolar electrocoagulation in 20 ulcers, the remaining ulcers were left untreated as controls. Spontaneous intravascular thrombosis was precluded by heparinization. A histological assessment in the acute stage revealed significant morphological alterations in electrocoagulated ulcers, with fibrin deposition, decreased tissue stainability and swelling of the vessel walls, indicating heat-induced damage including cells of the vessel walls. An intravascular occlusive fibrin thrombosis demonstrated in all coagulated ulcers is suggested to be the probable mechanism of hemostasis.

Animals↗
PubMed1984

The strain on sutured Achilles tendons in walking cast. An EMG analysis.

To evaluate the strain on a sutured Achilles tendon during walking in a short leg cast the EMG activity of the triceps surae muscles was studied. The regression line of the EMG/torque relationship of the triceps surae in the noninjured leg was investigated during isometric contractions with the foot in the same plantarflexed position as the injured foot immobilized in plaster cast. A linear relationship was found between EMG activity (EMG signals converted to rectified mean square values) and torque, measured with Cybex II. The torque provided by the triceps surae of the injured leg was calculated from the registered EMG activity during walking and the regression line. The strain acting on the sutured Achilles tendon was calculated after measurement of the lever arm. There was no significant difference in calculated strain on the sutured Achilles tendon during nonweight bearing in a short leg cast and full weight bearing without external rotation movement of the leg. External rotation movement of the leg during full weight bearing gave increased strain on the sutured Achilles tendon. The actual strain is considered somewhat lower than the calculated one since other muscles than the triceps surae contribute to plantar flexion of the ankle joint. The results indicate that the strain during weight bearing in a short leg cast is unlikely to exceed the strength of a sutured Achilles tendon.

Achilles Tendon↗
PubMed1983

Factors influencing mortality in patients with bleeding ulcer. Review of 7 years' experience preceding therapeutic endoscopy.

Over a seven-year period 369 patients with a median age of 67 years were admitted with bleeding peptic ulcer and 41% of the patients required emergency surgery. In 37 low risk patients (24%), defined as patients younger than 70 years without a complicating disease, the mortality rate following emergency surgery was 11% compared to 36% in 118 poor-risk patients (p less than 0.005). A preexisting complicating illness, postoperative complications, and absent history of dyspepsia were calculated to be the three most important factors determining fatal outcome. Age, onset of hemorrhage during hospitalization or prior to admission, previous ulcer surgery, previous bleeds, preoperative endoscopy, site of the ulcer, timing of surgery, and transfusion requirements had comparatively less bearing on the outcome. Hematocrit exceeding 37 in the postoperative period, however, was associated with a significantly increased risk of cardiopulmonary insufficiency. Though surgery controls life-threatening hemorrhage, it is badly tolerated in the many poor-risk patients, and an evaluation of other efficient methods carrying a lower risk of lethal complications seems justified.

Adult↗
PubMed1982

The value of dorsal column stimulation in multiple sclerosis.

Ten patients with definite and one with probable MS, all markedly inflicted, but with a varying degree of motor and bladder dysfunction were subjected to spinal cord stimulation in a controlled study. None of the patients exhibited appreciable fluctuation in symptoms in the pre-study period. Bladder symptoms were most markedly influenced by electrical stimulation. The reduction in hesitancy and urgency was of great importance to the patients. In 9 of 10 patients reduction in voiding frequency took place, the all over reduction being 8%. Maximum extension torque increased by 9% and flexion torque by 29% during the stimulation when compared to the first placebo period. In selected MS patients, i.e. patients with bladder dysfunction and with a certain muscular reserve, electrical spinal cord stimulation may have an indication.

Adult↗
PubMed1981

The outcome of staged management of complicated diverticular disease of the sigmoid colon.

In a retrospective study, 83 consecutive patients with indication for a staged treatment of complicated diverticular disease were reviewed. There was a considerable overall morbidity rate following construction of the colostomy, colonic resection, and colostomy closure. However, only 58% underwent a resection of the diseased segment, and even fewer (46%) obtained an eventual restoration of the colon continuity. This was primarily due to an unacceptable high mortality rate when patients with general peritonitis were managed by a proximal colostomy and drainage only. Subsequently, advanced age and associated major illness in patients with a planned three-stage management were the most important factors, determining the deficient completion of the staged treatment. Due to the permanence of many transverse colostomies but also to the fact that serious anastomotic complications, including fatal consequences, occurred despite a defunctioning colostomy, one should re-evaluate the need for a proximal colostomy in patients at high risk, considering resection and an end sigmoid colostomy which is the superior permanent stoma if reconstruction fails to come.

Adult↗
PubMedDate not supplied

Proximal fecal diversion: review of ten years' experience.

In a retrospective study, the clinical course of 250 patients subjected to 257 transverse colostomies was reviewed in an effort to evaluate the problems associated with proximal fecal diversion. Morbidity following stomal construction was 28 per cent, with a significant increase when performed in infants or as an emergency. Two-thirds of the colostomies were emergencies, chiefly due to obstruction and free perforation which was associated with a mortality rate of 12 and 48 per cent respectively. In 102 patients undergoing definite colorectal resection with a previous or simultaneous transverse colostomy, the overall morbidity rate was 58 per cent including a leakage rate of 22.5 per cent. Despite a proximal defunctioning colostomy, surgical intervention was required in 12.7 per cent with a fatal outcome due to peritonitis in 3.9 per cent. Colostomy closure was associated with a morbidity rate of 57 per cent, comprising a leakage rate of 10 per cent and a mortality rate of 1.7 per cent. Apart from incurable cancer and deaths prior to closure every third patient kept the transverse colostomy permanently. Advanced age and poor condition of patients not proceeding to a definite treatment, or an underlying benign lesion were the three most determining factors. The present results indicate a too extensive use of transverse colostomy, emphasizing the need for a circumspect initial selection of patients for diversionary procedures.

Adolescent↗