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Biomedical subjects

U Lanz

Publications and source records attributed to U Lanz.

At least 127 records · Page 7Linked to original sources
PubMed1977

[Tendon suture in the tendinous sheath--experimental study].

Tendon sutures were carried out in the flexor digitorum longus tendon 54 rabbits within the osteofibrous canal at the level of the ankle joint. The suture technique of BUNNELL, LENGEMANN and KESSLER were compared. The adhesions and the vascular pattern in the suture are were observed by means of idian ink injection, microdissection and in thin sections cleared with methyl salicylate. Tendon healing with only minimal adhesions seems to be possible provided that the gap between the tendon stumps is rather small. It originates from the vascularised epitenon of the tendon stumps. In tendon sutures after KESSLER the gap averaged only 2,5 mm whereas the average after BUNNELL suture was 6,7 mm, after LENGEMANN suture 9,8 mm. Early mobilisation of the tendons without tension according to the technique of KLEINERT seems to be suitable to minimise adhesions in the suture area.

Animals↗
PubMed1977

[Evaluation of digital nerve sensitivity following reconstruction].

1. In the reconstruction of nerves suture and autogenous grafts are employed in a complementary way. 2. The action potential of sensory nerves does not seem to be an objective parameter to evaluate the results. 3. The Moberg-test detects deficits of the pinch. 4. Two-point-discrimination seems to be the most valid quantitative measurement for sensible reconstruction. The examination is simplified by the two-point-star. 5. The Millesi-test shows good correlation to two-point-discrimination.

Evaluation Studies as Topic↗
PubMed1977

[The "open-palm" technic in the treatment of Dupuytren's contracture].

We report our experience in the treatment of 39 patients with Dupuytrens' contracture using the "open-palm" technique (McCASH). In this method the palmar fascia is excised through a transverse incision in the distal plamer crease. The wound is left open. The advantages of this method are: no necrosis of the skin, absence of haematomas, closure of other incisions without tension, early motion with little postoperative discomfort. Based on our experience we recommend this method for a selected group of patients.

Dupuytren Contracture↗
PubMed1976

[A new technic for the correction of malunited distal radius fractures].

After malunited fractures of the distal radius the original anatomy of the wrist joint can be restored only by osteotomy of the radius and interposition of a cortico-cancellous bone block. This procedure has been shown to be much easier using a new bone plate for internal fixation. The plate is applied to the radius volarly through a radio-volar approach. The correcting angles can be adjusted easily. The stable osteosynthesis allows early postoperative motion. In cases of osteoarthritic changes the procedure may be combined with a denervation of the wrist joint (A. WILHELM).

Bone Plates↗
PubMed1976

[Ganglions a rare cause of isolated peripheral nerve lesions].

Extra- and intraneural ganglionic cysts rarely involved peripheral nerves. They are found in the neighbourhood of large joints. The ulnar nerve is affected most often by extraneural cysts at the wrist. Intraneural cysts prefer the peroneal nerve at the tibiofibular joint. Ganglionic cysts as a cause of peripheral nerve damage are often overlooked, mainly because they are not considered as a cause of pain, paresis or sensory changes. Surgical treatment is recommended.

Cysts↗
PubMed1975

[Variations of the median nerve at the carpal tunnel].

In over 250 operative procedures in 135 cases the median nerve was subjected to a close study in the carpal tunnel. In 13 cases modifications of its regular branching were found. These variations have been described together with those reported in the literature. A double motor branch (6 cases) and a high division of the median nerve (4 cases) were the most common. In very few cases an accessory motor branch was found to leave the nerve proximal to the carpal tunnel.

Carpal Tunnel Syndrome↗
PubMed1975

[Intraneural ganglion in the peroneal nerve].

Report of a case of an intraneural ganglion in the peroneal nerve. Reviewing the literature this rare case of peroneal nerve palsy is discussed. The therapy consists in an operative decompression of the nerve by excision or incision of the ganglion cyst.

Humans↗
PubMedDate not supplied

[Surgical correction of malunited fractures of the forearm in children].

AIM: In our goal-oriented society the demands for a forearm with full function are increasing. Functional deficits are not acceptable even if they persist only for a limited period of time. Therefore a rising number of surgical corrections of malunited forearm fractures in the pediatric patient has been performed during the last years. However literature about indication, technique and outcome in these patients is rare. For that reason we report our experience about surgical correction of malunited fractures of the forearm in 14 children. METHODS: Fourteen patients with an average age of 13 years at the time of surgical correction of a malunited fracture of the forearm were included. Seven had a deformity of the shaft, five at the distal forearm without and two with growth disturbance. Malunions without growth disturbance were corrected with an osteotomy and plate fixation. Those with growth disturbance were first treated with callus distraction. Previous to and 24 (3 to 100) months after surgical correction the patients were examined clinically and radiologically. Range of motion was noted. Additionally to the range of motion, grip strength and pain (VAS) were documented. Patients with correction of the distal forearm were asked to fill out the DASH questionnaire. RESULTS: In all groups a significant increase of the range of motion was noted in pro-/supination of 61 per cent to 85-0-80 degrees. In patients with distal correction additionally the range of motion in extension/flexion of the wrist improved 30 per cent to 70-0-65 degrees and in ulnar/radialduction 22 per cent to 30-0-35 degrees. At follow-up the grip strength following distal corrections was 98 per cent of the opposite side. The patients had no pain (VAS < 3 points). The median subjective functional result was excellent with a median DASH score of 3.5 points. CONCLUSIONS: Our results show that potent techniques for surgical correction of malunited forearm fractures in the growing skeleton are available. These techniques allow excellent functional outcome.

Adolescent↗
PubMedDate not supplied

[Congenital unilateral muscular hyperplasia of the hand - a rare malformation].

This is a report on eight cases of a rare congenital malformation in the upper extremity, consisting of a unilateral muscular hyperplasia. In addition to the hand, all segments of the upper extremity may be affected. The hyperplasia is always unilateral, preferably on the right hand side, in combination with accessory muscles. Hereditary dependence or association with other malformations has not been observed. Six of eight patients were male. Shoulder and arm function were normal in all cases. Ulnar drift of the fingers in the metacarpophalangeal joints (six of eight patients), flexion contractures of the metacarpophalangeal joints (six of eight patients) and extension contractures of the wrist (three of eight patients) to various degrees were seen. A prominence of the second and third metacarpal head with an enlarged space between them gave the affected hands a very typical appearance (six of eight patients). Deformities and functional limitations requiring surgical treatment were present in six patients. In all cases, accessory muscles were found intraoperatively and resected. The macroscopic and microscopic appearance of the muscle specimen did not differ from normal muscular tissue. In all cases, additional procedures were necessary to improve the overall function. Nevertheless, the reconstructive efforts did not lead to an entirely normal hand function or appearance. The malformation we describe can clearly be distinguished from other malformations such as arthrogryposis multiplex congenita, Freeman-Sheldon syndrome or macrodactyly. Up to now, only two other reports were found in the literature showing characteristics similar to those in our own cases. Four similar cases were observed by Benatar. From a pathomechanical point of view, a disturbance in the muscular balance seems to cause the deformities and functional limitations. This imbalance could be related to accessory muscles which are not opposed by defined antagonists or to an unbalanced hyperplasia of normally developed musculature. Surgical intervention should begin early to prevent joint stiffness. Splinting and hand therapy should precede surgical intervention. Surgical treatment should aim to restore the muscular balance by resection of accessory and hyperplastic musculature. In some cases, muscle transpositions and joint releases may have to be performed. Postoperative splinting and intensive hand therapy are mandatory to preserve the results.

Adolescent↗