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Biomedical subjects

A Wilhelm

Publications and source records attributed to A Wilhelm.

14 recordsLinked to original sources
PubMed1992

[Anatomy of the flexor and extensor tendons].

The flexor and extensor tendons of the hand are equipped with special gliding mechanisms. Blood supply is provided via paratenon and in the fibro-osseous tunnel via mesotenon. The tendons show different amplitudes of active excursion which decrease distally. The function of flexors and extensors is coordinated and supplemented by reflexes and by the correlating relay system of lumbricals. Activation of extensor aponeurosis results via the so-called extrinsic and intrinsic system, where the IP joints are additionally linked functionally by the oblique retinacular ligaments of Landsmeer. At the level of the MP joint, the dorsal aponeuroses are furthermore linked by oblique fibrous structures, which lead to functional impairment of the neighboring MP joints in maximal flexion and extension of a finger due to an effect of tenodesis (so-called quadriga phenomenon).

Fasciotomy↗
PubMed1992

[Infection with Leptospira interrogans, serovar mozdok, in cattle].

In East Germany the same serovar, Leptospira mozdok, of the Pomona serogroup is found in cattle as well as in swine populations (Zieris 1989). Nowadays cases of bovine leptospirosis caused by infection with L. pomona have no significance. There are marked epizoological differences between infection with L. mozdok and L. pomona. The main source of infection with L. mozdok for cattle is the black striped field mouse (Apodemus agrarius). Secondary homonomous transmission occurs among the cattle. The clinical course of both infections is the same--including peracute, acute and chronic forms. Important prophylactic measures are effective rodent control and optimising hygiene conditions both in housing and on pasture. Veterinarians in abattoirs must consider leptospirosis in the differential diagnosis in cases with icteric signs, especially when the meat is derived from emergency slaughter.

Abortion, Veterinary↗
PubMed1989

[The importance of subclavian vein stenosis for the treatment of Dupuytren's contracture].

The postoperative healing in cases of Dupuytren's contracture is not only influenced by the age of the patient and the progress of the disease, but also by the existence of other accompanying diseases and general and local factors. The appearance of postoperative edema and the so-called hand-finger-syndrome are also especially unfavorable, because these complications determine the duration of treatment and the functional results. As a cause for these postoperative complications a disorder of the subclavian vein could be found and documented by means of phlebography. Preoperative examination of the venous situation is therefore an important diagnostic step to determine indications and to allow an estimation of the postoperative course and the duration of treatment. Demonstration of cases and statistical evaluation of our patients over the last five years show the importance of this observation.

Constriction, Pathologic↗
PubMed1988

[The quadriga phenomenon of the extensor tendon system and the superficial transverse metacarpal ligament].

The aponeurosis of the common extensor tendons is connected by intertendinous connections proximal to the metacarpophalangeal joints. These fibers are responsible for tenodesis effects in case of maximal finger extension and flexion and by this means they diminish the function of the other metacarpophalangeal joints. This mechanism can be described as the Quadriga-Syndrome of the extensor apparatus. These connecting structures also help to stabilize the transverse metacarpophalangeal arch and the position of the extensor tendons over the metacarpal heads. Cadaver dissections as well as operative findings have shown that there exists a superficial transverse intermetacarpal ligament, which connects the metacarpal heads in the area of its neck.

Finger Injuries↗
PubMed1985

Sex-dependent endorphinergic and adrenergic control mechanisms of luteinizing hormone secretion in immature rats.

Previous studies in male and female immature rats have revealed striking sex differences as concerns endorphinergic and adrenergic control of luteinizing hormone (LH) secretion. The present study examines in 10 days old male and females rats whether these differences result from sexual differentiation of the brain, or acute effects of male and female gonadal hormones. The techniques employed to manipulate these mechanisms were gonadectomy immediately post-partum and androgenization. Androgenization on the 1st and 2nd day of life reduces the ability of naloxone to elevate serum LH levels in females, but failed to modify the LH-elevating effect of clonidine in males. Experiments with castrates showed that testosterone is critical for these sex-related differences. Treatment with testosterone on the 9th day of life of intact or gonadectomized rats revealed the ability of this hormone to modify LH-release acutely. We conclude that sexual differentiation of the brain may be of minor significance for the sex-related LH-control mechanisms in prepubertal rats. Of importance is the acute presence of testosterone, since in its absence male characteristics disappear.

Animals↗
PubMed1979

Obstruction of the duodenal bulb caused by gallstone perforation.

Because of acute symptoms in the upper abdomen, upper gastrointestinal endoscopy was performed in a 75-year-old female patient. A large (5 cm x 10 cm) perforated gallstone was embedded in the duodenum, causing complete obstruction of the duodenal bulb. The stone was removed via pylorotomy. A fistula remained between the gallbladder and the duodenum. Cholecystectomy was not carried out because of the unfavourable cardiac condition of the patients. There was no complications.

Aged↗
PubMed1979

[Treatment of arthroses of the carpal bones and the first carpometacarpal joint with liquid silastic implants].

In cases of resection arthroplasties of the carpometacarpal joint of the thumb we implant liquid silastic. This implant provides a good adaptation to the individual local situation and shows a good resistance to deformation. On the basis of our initial experience with this procedure we regard it as highly apt to provide an exactly fitting substitute in the wrist--especially in cases of an extirpation of the lunate bone.

Arthritis↗
PubMed1977

[Operation for draining the stomach by subtotal pyloro-myectomy with and without dilatation of the mucous membrane (author's transl)].

According to our experiences a pyloroplasty adequate in shape and function can be formed by a separate plastic surgical treatment of the serosa muscularis and mucosa, which can not only be carried out in a very simple way, but if strict attention is paid to its indications and the technical details are adhered to exactly, it also guarantees a complete normalization of evacuation of the stomach without dumping syndrome and duodenal reflux with satisfactory reliability. The necessary intervention consists essentially of a subtotal pyloro-myectomy which is combined with distention of the canal mucous membrane if it is too narrow.

Drainage↗
PubMed1977

[Management of epicondylitis humeri radialis through the decompression of the radial nerve].

The pain associated with refractory epicondylitis humeri radialis can be eliminated not only by denervation, i.e. palliatively, but also by decompression of the radial nerve in certain cases. We assume that the latter procedure eliminates an important cause of irritation, particularily by resection of the tendineous origin of the proximal caput of triceps muscle. In this respect we consider the inferior cervical syndrome, present in all cases, to be the primary pathogenetic factor in accordance with REISCHAUER.

Athletic Injuries↗
PubMed1977

[Functional mechanisms of the proximal ulnar nerve compression syndrome].

The proximal ulnar compression syndrome when it is not a result of trauma, tumors, inflammatory and degenerative processes, inborn deformations or external pressure, is caused by two mechansims, namely the pinching of the ulnar nerve between the proximal edge of the ligamentous and muscular coverings of the cubital tunnel and of the exit of the nerve from the tunnel under the tendinous arch of the flexor carpi ulnaris. The compression itself is dependent upon the possibility of subluxation of the ulnar nerve. Therapy should consists not only in "decompression", but also in a simultaneous anterior transposition of the ulnar nerve.

Elbow↗
PubMed1977

[Therapeutic possibilities in fibro-lipomatous hypertrophy of the hand and finger nerves].

If the main nerves of the forearm and wrist are effected with fibro-lipomatous hypertrophy, decompression can be performed as a palliative measure. As the disease is not pregressive, resection or defatting of the hypertrophic fascicles should be avoided. The fibrous and lipomatous tissue cannot be separated from the fascicles without damaging them, even if the finest microsurgical technique are applied. As the disturbance of motor function increases, reconstructive surgery is necessary. In the fingers the "tumor" can be resected completely; the sensation of functionally important areas should be reconstructed with a neurovascular island flap or local pedicle flaps.

Adult↗
PubMed1976

[Radial nerve compression].

A new compression syndrome of the deep branch of the radial nerve is described, in which a sudden anterior displacement of a part of this nerve under maximal tension is followed by an axonotmesis. This happens in an area in which the deep branch of the radial nerve crossed some narrow structures which are unyielding and have more compression strength (tense cords of connective tissue Fig. 3). The operative finding of a torsion of the injured fascicles justifies the correctness of the immediate operative revision; otherwise the nerve regeneration would be impaired by the torted empty endoneural tubes. This description is a further constribution not observed before to the compression syndromes of the radial nerve, since in 1970 the author was able to give an explanation for the pathogenesis of compression palsies of the radial nerve, unclear up to that time but observed after forceful muscle contractions again and again since the beginning of this century. This observation gives the evidence that the occurrence of a peripheral compression lesion of nerves is not bound absolutely on the existence of a "physiological narrowness" (fibrous or osteofibrous tunnel etc.). This is also true for the median nerve.

Humans↗