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Biomedical subjects

R Schwaiger

Publications and source records attributed to R Schwaiger.

9 recordsLinked to original sources
PubMed2004

Outcome after primary hemiarthroplasty for fracture of the head of the humerus. A retrospective multicentre study of 167 patients.

We have examined 167 patients who had a hemiarthroplasty for three- and four-part fractures and fracture-dislocations of the head of the humerus in a multicentre study involving 12 Austrian hospitals. All patients were followed for more than a year. Anatomical healing of the tuberosity significantly influenced the outcome as measured by the Constant score and subjective patient satisfaction. With regard to pain, the outcome was generally satisfactory but only 41.9% of patients were able to flex the shoulder above 90 degrees. The age of the patient and the type of prosthesis significantly influenced the healing of the tuberosity, but bone grafting did not. Achievement of healing of the tuberosity was inferior in institutions at which less than 15 hemiarthroplasties had been performed (Mann-Witney U test, p = 0.0001).

Adolescent↗
PubMed2001

Minimally invasive reduction and osteosynthesis of articular fractures of the humeral head.

Percutaneous reduction and fixation of severe humeral head fractures would be the treatment of choice since it will not increase the risk of necrosis already inherent in these fractures. Nevertheless, the question arises of whether anatomical reduction is possible with the percutaneous technique and whether the reduced fracture can be adequately stabilized. It is important to study the fracture closely before the operation in order to determine the fracture type and identify the relationship of the individual fragments to each other. Radiographs taken in at least two planes are essential and a CT scan with 3D reconstruction would be desirable. Besides extraarticular fractures, surgical neck fractures with avulsion of the greater tuberosity (B1 and B2 fractures) and valgus impacted fractures (C1 and C2 fractures) are good indications for this method due to the fact that in these cases intact connections to rotator cuff tendons or remnants of intact periosteum between fragments still exist. Less good indications are fractures with severe lateral displacement of the articular segment and severely displaced fracture dislocations (C2 and C3 fractures). From 1990 to 1999, a total of 88 patients with 37 B1 and B2 fractures and 41 C1 and C2 fractures were operated on percutaneously. The initial 27 patients with 9 B1 and B2 and 18 C1 and C2 fractures were followed up. All B1 and B2 fractures showed good to very good functional results (Constant Score 91%). The Constant Score of the C1 and C2 fractures was 87%. The necrosis rate of the C1 and C2 fractures was 11%. In conclusion, it can be said that the presence of soft tissue bridging of the various fragments is crucial for the reduction to gain benefit from the ligamentotaxis effect. Thus, fractures such as valgus impacted or three-part fractures are very good indications for this technique. It can also be stated that the necrosis rate is low or at least not increased compared to cases treated by open reduction. Since the fracture is not exposed, adhesion within the surrounding gliding surfaces is reduced and the rehabilitation period is shorter.

Bone Screws↗
PubMed1986

[Animal experiment studies on improving ischemia tolerance of the testis].

The reactions of the germinative testicular epithelium after definite ischemia periods were studied in rats. Using heparin the testicular ischemia tolerance has already been prolonged; this can be distinctly improved by adding alphareceptor blockers. The consequences of a 30 min and 2 h period of testicular ischemia are nearly eliminated by the described medicamentous combination. The experimental results show that at present the use of heparin and alpha-receptor blockers seems to be the best way, to extend the ischemia tolerance during autotransplantation of testicles.

Adrenergic alpha-Antagonists↗
PubMed1985

[Unilateral atrophic kidney and hypertension--the value of plasma renin determination for assessing the indications for nephrectomy].

In unilateral atrophic kidney and hypertension the nephrectomy is the therapy of choice. The nephrectomy is, however, indicated only then, when a causal pathogenetic connection of atrophic kidney and hypertension is proved. As criterion of the proof of such a connection according to our experiences the side-separated determination of the plasma renin activity in the venous blood of the kidneys stood the test. A renal vein renin quotient greater than 1.5, moreover, permits a rather reliable prognostic evidence concerning the behaviour of the postoperative blood pressure. In 26 out of 31 hypertensive patients with significant renal vein renin quotient who were nephrectomized for a unilateral atrophic kidney could be achieved a normalization of the blood pressure, in the other 5 patients an improvement of the blood pressure.

Adolescent↗
PubMed1984

[Microsurgery in urology].

The use of microsurgical techniques offers operative perspectives also in urology. Microsurgery is indicated for reconstructive vascular surgery in the kidneys, in cases of erectile impotence, and in high maldescended testicles, for recanalisation of the vas deferens and in early childhood for plasty surgery of malformations of the upper urinary tract and such of the male genitals. Certain indications are presented under reference to own clinical experiences.

Adult↗
PubMed1983

[Concept of interdisciplinary procedures within the scope of traumatology--the status of urology].

Following criteria decide on the further life of patients with acute severe trauma: how fast injuries and their severity are recognized and following therapies are managed; prior conditions for a sufficient treatment of the acute trauma patient consist in a perfect organization and a good cooperation of all specialists. Important details of the therapeutic concept, divided in 5 or 6 phases are given. Furthermore special urological aspects in cases of multiple injuries are discussed.

Humans↗
PubMed1983

[Diagnosis of kidney injuries].

The exact staging of kidney damages is actually possible with the anamnesis, clinical symptomatology and different diagnostic methods. According to a greater experience the importance of the digital subtractionangiography, the sonography and computertomography is increasing The urography as a basic examination cannot be replaced by other methods, whereas only with the angiography previous to the operation the exact morphology of ruptured intrarenal arteries and injuries of the renal stalk may be found.

Humans↗
PubMed1982

[Radiotherapy of bladder malignomas with rapid electrons (author's transl)].

After having been submitted to mainly transurethral electroresection, a not selected group of patients (n = 143) with bladder carcinomas of different, mostly advanced stages (TIS and TI = 4 patients, T2 = 33, T4 = 13) was irradiated with the circular accelerator (betatron) applying a telecentric pendulum method with a small angle. The total dose of 5100 rd (51 Gy) which we wanted to achieve hitherto was administered to 129 patients; 14 patients received a lower dose. Radiogenic complications were unimportant. Only 25 patients presented a cystitis during and after radiotherapy which disappeared after treatment. A contracted bladder as final condition was seen in 5.5% (8 patients) of all irradiated patients. The three-year survival rate of all stages was 44.9%, the five-year survival rate of 31.3%.

Cystitis↗