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Biomedical subjects

C Sollerman

Publications and source records attributed to C Sollerman.

13 recordsLinked to original sources
PubMed1991

Functional splinting versus plaster cast for ruptures of the ulnar collateral ligament of the thumb. A prospective randomized study of 63 cases.

In a prospective randomized study that included 63 consecutive thumbs with injuries of the ulnar collateral ligament of the metacarpophalangeal (MCP) joint of the thumb, plaster cast immobilization was compared with functional treatment with a splint. The splint allowed flexion and extension of the MCP joint, but prevented ulnar and radial deviation of the thumb. The study included both operated on and nonoperated on cases where surgery was performed only when the torn ligament was regarded as displaced. Of 40 thumbs treated nonsurgically, 21 were treated with a cast and 19 with a splint. Of 23 thumbs treated surgically, 10 were immobilized postoperatively in a plaster cast and 13 were treated with the splint. At the follow-up examination after 15 (11-41) months, there was no difference between the treatment groups as regards stability, range of motion, strength of the injured thumb, and length of sick leave. However, the patients considered the splint more comfortable than plaster cast immobilization. We conclude that immobilization of the thumb after a ligamentous injury with a movable splint is strongly preferred by the patients and that the functional results of this technique are equal to plaster cast immobilization after both surgical and nonsurgical treatment.

Adolescent↗
PubMed1990

Diagnosis of displaced ulnar collateral ligament of the metacarpophalangeal joint of the thumb.

In a prospective study of 24 consecutive patients with posttraumatic instability of the metacarpophalangeal joint of the thumb, clinical examination including instability tests and palpation of displaced ulnar collateral ligaments was used to separate the patients into two groups--nondisplaced and displaced ruptures. Palpable displaced ruptures were treated surgically, whereas nonpalpable ruptures were interpreted as nondisplaced and were treated with plaster, irrespective of the instability. At follow-up 1 year later both groups showed similar results with respect to stability, strength, and function. Our results indicate that a clinical examination with palpation of the torn ligament ends identifies displaced ruptures of the ulnar collateral ligament, i.e., those cases needing surgery. Nondisplaced ruptures might be treated nonoperatively.

Adolescent↗
PubMed1990

Cooling enhances alpha 2-adrenoceptor-mediated vasoconstriction in human hand veins.

The contribution of different receptor subtypes in the contractile response during cooling in human hand vessels is of considerable interest in the understanding of cold-induced peripheral vasospasm as it appears in Raynaud's phenomenon. Subcutaneous vein segments from 50 patients undergoing hand operations not related to vascular disorders were examined in vitro. The temperature in the organ bath was initially 37 degrees C and was either continuously lowered to 10 degrees C or kept constant at 37 degrees C, 29 degrees C or 20 degrees C. The characteristics of the alpha-adrenoceptor-mediated motor response were elucidated with the use of the alpha 1-antagonist, prazosin, and the alpha 2-antagonist, yohimbine. A great variability between individuals in the proportions of alpha 1- and alpha 2-adrenoceptors was found. In the majority of the vessels continuous cooling to 25 degrees C augmented a noradrenaline-induced contraction. This augmentation was unaltered in the presence of prazosin but abolished by yohimbine, suggesting that it was mediated via the alpha 2-adrenoceptor. In the remaining vessels with a predominating alpha 1-adrenoceptor-mediated response a cold-induced relaxation was registered. This could be the result of a reduced alpha 1-adrenoceptor-mediated contraction at this low temperature. These varying reactions to cooling were unaffected by the beta-antagonist, propranolol, and by endothelial denudation. The results obtained in corresponding experiments with the alpha 1-agonist methoxamine and alpha 2-agonist, oxymetazoline, were conflicting, probably due to the poor selectivity of these agonists in human tissues.(ABSTRACT TRUNCATED AT 250 WORDS)

Adrenergic alpha-Agonists↗
PubMed1990

Repair of osteochondral defects in the rabbit knee with Gore-Tex (expanded polytetrafluoroethylene). An experimental study.

In 28 knee joints in 14 rabbits 4 mm circular osteochondral defects were created in each medial femoral condyle. In 24 of the knee joints 4 mm Gore-Tex (E-PTFE) patches were glued into the defects with fibrin glue. Four joints were left without implants and served as controls. In 16 joints the membrane showed good macroscopic incorporation into the joint surface. In four joints the E-PTFE patches were lying loose. In the controls the defects were covered by thin irregular layers of reparative tissue. On histological examination at 12 weeks, cells were seen proliferating through the membrane and overlying its joint facing surface with the morphological appearance of the outer layers of the normal articular surface. We conclude that Gore-Tex might be of potential value in restoring the architecture of a damaged articular surface.

Animals↗
PubMed1990

Wrist synovectomy in juvenile chronic arthritis (JCA).

Synovectomy of 20 wrist joints in 15 patients with juvenile chronic arthritis (JCA) was performed and results were evaluated 3 (0.5-5) years after surgery. The surgical procedure consisted of synovectomy of the radiocarpal joint, around the ulnar head and in all intercarpal joints. Resection of the ulnar head was not performed. Results at follow-up showed that four wrist joints had been re-operated by arthrodesis because of persistent pain. In one case a spontaneous ankylosis had developed. These cases were not included in the re-examination. Of the remaining 15 cases, 12 were improved and 7 of these were totally pain-free. At follow-up, clinical examination revealed a mean improved grip strength (0.2 kp/cm2) and a mean decreased range of motion (10 degrees of flexion and extension, 16 degrees of pronation, supination unchanged). All wrist joints showed some radiographic changes preoperatively and at follow-up about half showed some further deterioration. This study indicates that the results of wrist synovectomy in patients with juvenile chronic arthritis do not differ significantly from results of wrist synovectomy in adult arthritic patients.

Adolescent↗
PubMed1990

Lipofibromatous hamartoma of a digital nerve. A case report.

Lipofibromatous hamartoma is a rare, benign tumor, most often affecting the median nerve. Our case involved the volar radial digital nerve of the index finger, treated with a partial excision of the tumor. Important nerve branches should not be sacrificed in order to achieve radical excision.

Adult↗
PubMed1988

Silastic replacement of the trapezium for arthrosis--a twelve year follow-up study.

Thirty-three patients with 39 Swanson silastic trapezium implants have been studied. Three years after operation no dislocation or evidence of implant wear was found, but re-examination at an average of 12 years after operation revealed dislocations and implant wear in about half of the cases. Cyst formation in surrounding carpal bones was found in twenty cases. The result in terms of pain relief and thumb function was good and comparable to the three-year follow-up. A significant correlation was found between weakness of the pinch grip and dislocation of the implant. No correlation was found between pain and dislocation of the implants, nor between pain and presence of intraosseous cysts.

Aged↗
PubMed1987

A case of phalangeal lengthening.

A severely shortened and deformed index finger--due to osteomyelitis of the middle phalanx--of a 12-year-old boy was lengthened by using a Kessler distraction device. Distraction for 2 weeks followed by interposition of a 15-mm bone graft resulted in a stable painless finger of normal length.

Bone Lengthening↗
PubMed1987

Lateral elbow pain caused by anconeus compartment syndrome. A case report.

A carpenter presented with lateral elbow pain and bulging tenderness and impaired function of the anconeus muscle. Computed tomography showed enlargement of the muscle. The intracompartmental pressure was increased at rest, during and after exercise, and had a prolonged recovery time. The patient recovered immediately after fasciotomy of the anconeus muscle, and 6 months later he was still free from pain and intracompartmental pressures were normal.

Compartment Syndromes↗
PubMed1987

A new principle for assessing vibrotactile sense in vibration-induced neuropathy.

The vibrotactile perception threshold has been evaluated in 20 manual workers not exposed to occupational vibration and in 27 workers using hand-held vibrating tools. Threshold values were evaluated with a Békesy type of vibrometer at frequencies ranging from 8 to 500 Hz. The earliest sign of vibration lesion was a reduction of sensation at frequencies of 125 to 250 Hz, indicating dysfunction in receptors of the fast adapting type II (stage 1 curve), followed in more severe cases by a prominent loss of sensation at all frequencies higher than 65 Hz (stage 2 curve). The stage 3 curve indicated the most severe loss of sensation in which the function of slowly adapting type I receptors, as well as fast adapting type I receptors, was deteriorated; consequently the vibrotactile thresholds at low-, median-, and high-frequency ranges were impaired. The vibrotactile changes corresponded well to numbness and the presence of vibration-induced white finger.

Adolescent↗
PubMed1986

Digital vibrogram: a new diagnostic tool for sensory testing in compression neuropathy.

A Békésy audiometer was modified for use in analysis of vibrotactile sensibility of the hand at frequencies ranging from 8 to 500 Hz. In control subjects the "digital vibrogram" has a typical shape, which differs characteristically in patients with carpal tunnel syndrome (CTS). Changes in digital vibrogram usually parallel or precede abnormalities in neurophysiologic tests, and appear long before changes in two-point discrimination (2PD). One-hundred-thirty-two hands of 76 patients diagnosed as having CTS were tested with a vibrometer. Of 113 hands with normal 2PD, the digital vibrogram showed abnormal in 86 cases. Of 19 hands with abnormal 2PD, the digital vibrogram showed abnormal in all but three cases. Twenty-six hands with neurophysiologically normal appearance had abnormal digital vibrogram in 14 cases, while 53 hands neurophysiologically classified as CTS showed abnormal digital vibrogram in 44 cases. It is concluded that the digital vibrogram is a useful tool for early diagnosis of CTS.

Carpal Tunnel Syndrome↗