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Biomedical subjects

A Renner

Publications and source records attributed to A Renner.

At least 55 records · Page 3Linked to original sources
PubMed1986

[Extensive cavernous lymphangioma of the hand (case report)].

In two cases the authors show that cavernous lymphangioma of the hand can only be treated by radical removal of the tumor and replacement of the overlying skin. In one case the large skin defect caused by tumor removal was replaced by a radial artery forearm flap in one sitting.

Adolescent↗
PubMed1985

Measuring eye movements with a search coil: non-linear filter allows simultaneous recording of horizontal and vertical eye position by means of the phase modulation method.

Measuring eye position from the phase angle of the signal induced by a rotating magnetic field in a search coil presents a number of advantages. So far, however, existing schemes using this principle either record eye position in one dimension only or require two search coils. We describe here a simple analog circuit which singles out a signal of given frequency from a frequency composite without changing the signal's phase. This makes it feasible to measure horizontal and vertical eye position with a single search coil by using two orthogonal rotating fields of different frequency.

Electronics↗
PubMed1984

Experimental microvascular sleeve anastomoses.

Microvascular sutures are the most essential parrt of microsurgery. The three basic types of anastomosis, i.e. end to end (ETE), end to side (ETS) and end in end (EIE), differ, beside the flow parameters, also in the succession, number and depth of the sutures as well as in the technique of suturing. In clinical microsurgery ETE and ETS anastomoses are applied. Several authors have attempted to telescope the vascular ends into each other to simplify the technique of anastomosis, to reduce the time of operation as well as to eliminate intraluminar suturing [1, 3, 6, 9].

Animals↗
PubMed1983

[Measurement of residual urine in outpatient clinics with a small ultrasound device].

Serial controls of residual urine are necessary in the case of patients with such chronic diseases as multiple sclerosis, in which there are neurogenic bladder disorders. They can be done free of risk by ultrasound technique. A special, relatively cheap and battery-powered ultrasound scanner (Uroson) has been developed. Transducer, electronic circuitry and videoscreen together are the size of a book. Bladder volumes were measured with Uroson in 30 healthy persons with control of micturition and in 78 patients with residual urine due to neurogenic bladder disorders, with subsequent bladder catheterization. A total of 58 measurements in the range of 20-200 ml residual volume gave a correlation coefficient of 0.87 for the normal controls and 0.86 for patients, with a scatter of +/- 20%. These results agree with those reported earlier with the customary abdominal ultrasound apparatus. In 24 patients with residual volumes of less than 20 ml the Uroson gave correct result. Because of its simplified construction and single-button control Uroson does not require any special knowledge and, after instruction, can be used by non-medical personnel.

Female↗
PubMed1983

Muscle capillaries in tenotomized human muscles.

The capillaries were studied in tenotonized human muscles after tenotomy or spontaneous rupture of the tendon. The mean capillary area was not significantly different in the patients with tenotomy, or with spontaneous rupture of the tendon, as compared to intact muscles. The mean basement membrane area as a percentage of total capillary area was significantly larger and the size capillary lumen significantly smaller in the injured than in the intact muscles. The alterations of the capillaries were time-dependent.

Adult↗
PubMed1982

Tumours arising in skeletal muscles and tendons in adults.

Nineteen cases of tumours arising in the skeletal muscles and 22 cases of tumours arising in tendons seen over 15 years (1967-1981) are surveyed. Malignant tumours occurred most frequently in lower limb muscles and tendons, while benign tumours in the tendons of the hands.

Adolescent↗
PubMed1981

[Recent data in the diagnosis of scaphoid non-union (author's transl)].

An analysis of the problems of the scaphoid non-union diagnostics is given here, based on their experiences with more than 400 operations. Bennet's x-rays are always mandatory, and if problems arise, microfocal x-rays and tomography should be done. They draw the attention to certain x-rays signs described by them. Intraosseous venography has been introduced to help the diagnosis. The distinctive signs between bipartite scaphoid and scaphoid non-union are given too.

Carpal Bones↗
PubMed1980

The effect of tourniquet ischaemia on intact, tenotomized and motor nerve injured human hand muscles.

Ultrastructural examination of the intrinsic hand muscles was performed on young healthy patients undergoing reconstructive operation following tendon or nerve lesions. The muscle specimens were taken at the start and then every fifteen to twenty minutes until the end of the tourniquet ischaemia. The authors have not found any morphological alterations following the use of a tourniquet up to two hours in either the intact or previously injured muscles.

Adolescent↗