PubMed Health⌕ Search

Biomedical subjects

H Ecke

Publications and source records attributed to H Ecke.

At least 19 recordsLinked to original sources
PubMed1992

[Diagnosis and therapy of metastasis-induced pathologic fractures].

Improved survival rates of cancer patients have led to an increase in the incidence of metastatic disease of the bone. Normal load and minimal trauma may result in pathological fractures. The malignant diseases most commonly diagnosed were breast cancer, bronchial carcinoma and hypernephroma. The majority of the patients treated were female. The average interval observed between diagnosis of primary malignant disease and occurrence of the pathological fracture was 2.8 years. The purpose of the surgical procedure is to achieve immediate and lasting stability and ultimately to increase and restore the quality of life. Immediate postoperative mobilization and early functional treatment are an indispensable part of the management of pathologic fractures. If possible extensive bone destructions involving the risk of fracture should be stabilized prophylactically. Specific techniques of composite osteosyntheses of fractures in metastatic disease of the bone are presented.

Bone Neoplasms↗
PubMed1992

[Effect of form elasticity of the prosthesis shaft in response to stress of the proximal femur].

Uncemented hip prostheses are characterized by a variable design of the stem. In these investigations, nine different prostheses were studied according to the model of a standard bone (Kunststoffnormfemur). After preparation of the cavity of the prostheses with original instruments and after its implantation, strain gauges were placed at 16 certain points. Measurements were carried out in steps of 200 N until reaching the maximal force of 2kN. Prostheses that are characterized by an anatomical design of the stem resemble the physiological nature of normal bone, in contrast to the models with a rectangular cross-section or with a stretched lateral shape of the stem.

Biomechanical Phenomena↗
PubMed1992

[Post-traumatic lesion of the distal radioulnar joint with disordered forearm pronation].

Within a period of 14 years in 27 cases operative correction of a traumatic lesion of the distal radioulnar joint has been performed at the University Clinic of Giessen. The follow-up of our results is to be confined to the last ten cases; all efforts to evaluate the outcome of 17 joints having been operated on previously unfortunately have proved to be unfeasible. Different types of corrective operative procedures have been accomplished. Improvement of wrist function, particularly of pronation and supination, was obtained in almost every case.

Humans↗
PubMed1991

[Biomechanical studies of various forms of symphysis banding].

The banding operation with polydioxanone cord for pelvis stabilization after accidental symphysis rupture is altogether reliable. Nevertheless in some cases we saw later on non satisfying reduction results in the "pelvis-half-joints"--especially in intense dislocation of the iliosacral amphiarthrosis. For improving the stability we investigated the stiffness character of some different methods with four PDS cords varied by four and six drilling holes. By increasing number of holes and short intentions direction knotted cords the stability is growing by 25%.

Biomechanical Phenomena↗
PubMed1990

[Rupture of the amphiarthrosis of the pelvic girdle].

So-called over-bridging tension band fixations are presented with special respect to their surgical procedures, development to technique, operative approaches, experimental findings gathered from 83 human pelves explanted post-mortally and clinical results. PDS band fixation has shown to guarantee approximately the same stability as comparable procedures offering in any case an immediate ease of bedside care and the possibility of physical exercise in bed. A slight postoperative elongation of the PDS band is sometimes seen on the X-ray as a small step in the outlines of the symphysis, but so far has been of no importance in our cases of treatment.

Biomechanical Phenomena↗
PubMed1990

[Bone stress. A hitherto neglected factor in hip endoprosthesis design].

Growing interest in hip endoprostheses is giving rise to new ideas on form and materials, although it is not precisely known what forces the proximal femur is subject to. To find out more about these forces, we made computerized analyses of the stresses on some different types of prostheses in an artificial standardized femur. The E-module amounts to about 14,000 N/mm. Following measurements in tension-optic trials, we inserted Student gages (EA-13-060LZ-120) at 16 points around the proximal femur; these transmitted the pressure, tensile and torsion stresses to a multipoint measuring instrument (UPM 60) and on-line to a computer. The quality of implantation was monitored by X-ray. With loads varying from 0 to 1.5 kN in 250-N steps we made five readings to reproduce the measurements, without having any material failure. To ensure an absolutely reproducible outcome we used an artificial standardized femur (KNF by Mecron), which without prostheses shows the typical and well-known (Pauwels, Perren) pressure tensions medially and tensile stresses laterally, without crossing the zero line. A distinctly reduced stress profile was seen for pressure and tensile stresses with the ribbed system prosthesis, which might be due to the anchor and collar. Nevertheless, the torsion tensions should be noted. As expected, the shaft systems without anchor and collar show a lesser degree of stiffness. The Mecroblock MR system produces preponderantly pressure stresses, while the CLS (Spotorno) prosthesis sets up more torsion tensions in different directions.(ABSTRACT TRUNCATED AT 250 WORDS)

Biomechanical Phenomena↗
PubMed1989

[Follow-up studies and results of dorsal stabilization of unstable spinal fractures].

Temporary dorsal plate spondylodesis with transpedunclar screwing has proved successful in the therapy of recent unstable injuries to the spine. This method allows a considerable reconstruction and stabilization of the vertebral body as well as an early mobilization of the patient. The mobility of the spine will not be essentially reduced if the spondylodesis plates are removed early, i.e. six to nine months after their insertion.

Adult↗
PubMed1988

[Torsion forces of the proximal femur following implantation of a hip prostheses].

Growing interest in hip endoprosthesis is inducing a lot of ideas for formgiving, without having cleared the adequate strength to the proximale femur. To know more about these forces, we made computerized tension-analyses of some different types of prosthesis in a normed artificial femur. Measurement of press- and tensile tensions on one hand and the torsion-tensions on the other hand showed some enhanced forces which might be the reason for slackening of hip endoprosthesis.

Biomechanical Phenomena↗
PubMed1988

[Treatment of rupture of the peripheral radio-ulnar joint with chronic dislocation or subluxation].

Some possible treatment methods in luxations and subluxations of the distal radio-ulnar joint are discussed, especially in case of posttraumatically restricted pronation and supination of the forearm. An own method to treat these injuries is proposed which has been developed on the basis of former techniques. This method has proved very successful in two patients with extremely poor mobility values of the wrist joint in whom no measurable reduction of rough strength was observed. The further development of this method consists in a bone insertion between the peripheral ends of ulna and radius corresponding to the natural distance between both bones. Another new development is the resection of about 3 to 4 cm within the central third of the ulna.

Adult↗
PubMed1987

[Fractures of the glenoid surface of the scapula].

The communications of literature regarding osteosynthesis in glenoid fractures of the scapula are reviewed, and six own cases are presented. The results are better than expected even in case of comminuted fractures. The indication for surgical reconstruction should therefore be adopted in dislocated fractures of the shoulder joint surface. Although the adequate operation technique is still under discussion, there seems to be a trend towards screwing and a narrow DC plate.

Follow-Up Studies↗
PubMed1987

[Neglected infection of the knee joint].

In this study the characteristics and the treatment of neglected, i.e. chronic infections of the knee joint are described. The reasons for a certain part of these diseases are explained. Some therapeutic aspects are treated in detail. There patients considered to be relatively typical for these alterations are presented, and the results achieved in them are described. The management of these diseases has become routine to a large extent. The problems still existing refer to the assessment of the inflammation site within the knee joint and to the decision whether synovectomy is advisable or not in the individual degree of inflammation.

Adult↗
PubMed1986

[Arthrolysis of the elbow joint].

Promising results can be achieved in arthrolysis of the elbow joint in case of a strictly observed indication and if the intervention is carried out by an experienced surgeon. The problems of motivation in case of an existing indication are described. Only a motivated patient will be capable to cooperate to such an extent as is necessary for the postoperative follow-up treatment. Good results are subject to three conditions: the performance of the surgeon, i.e. the intervention itself, cooperation, and follow-up under medical supervision. This last point is especially important for the therapy result, because at present several health insurances have formed the opinion that after the operation the patient shall be abmitted for example to a physiotherapeutic institute without constant medical control. This is just the way which produces deleterious results especially following to arthrolysis, but also after all other accident surgeries and in particular after joint operations.

Ankylosis↗
PubMed1986

[Autologous blood-antibiotic filling as effective therapy of chronic osteomyelitis].

A control of osteomyelitis by parenteral administration of antibiotic drugs is not possible due to sequestration, thrombosis of the peripheral vessels, and encapsulation of the osseous focuses. The autoblood-antibiotic plombage was indicated in 1951 by Winter. The principle used for this method is the concentration of one or more antibiotic drugs in an autogenic carrier releasing the drugs which then exert their effect directly at the site of the disease. In the experimentation on animals, the streptomycin level in the peripheral blood decreases only after 130 hours to the inhibiting threshold value of 0.008 g/ml. The autoblood-antibiotic filling becomes a connective tissue filling and, about seven weeks later, a bone filling. There are three conditions for a therapeutic success of the antibiotic plombage. 1. It must be only a limited, unilocalized, not too extended bone process. 2. large débridement and sequestrotomy, and 3. the bone must be provided with an own absolute stability. 74 out of 112 patients treated with an autoblood-antibiotic plombage were immediately free from symptoms. Two thirds of these patients showed a superficial recovery.

Administration, Topical↗