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Biomedical subjects

G Hörster

Publications and source records attributed to G Hörster.

At least 19 recordsLinked to original sources
PubMed1993

[Loss of strength and regeneration of knee extensor musculature after operations of the knee ligaments. EMG studies of the effect of the injury pattern, surgical procedure and after-care with special reference to electromyostimulation].

Clinically relevant losses of the capacity of the extensor muscles of the thigh to contract voluntarily are usual after open knee joint operations and are known to lead frequently to a major delay in healing. In the present paper, a randomized prospective comparative study is presented in which the negative effect of the injury and surgical trauma on the extensor musculature of the thigh is compared between open and arthroscopically controlled cruciate ligament operations. The surface electromyogram is measured. The values found make it evident that an equally pronounced loss of strength amounting to more than 90% results after injuries in the region of the cruciate ligament apparatus and in open as well as arthroscopically controlled reconstruction operations. The alterations are mainly attributable to the surgical trauma. The injury on its own only leads to a roughly 25% loss of strength in the preoperative investigation. With an appropriate programme of follow-up treatment, the strength values are only partially restored after about six weeks. In the follow-up treatment, electromyostimulation has a significantly positive effect on the rectus femoris muscle, but not on the vastus lateralis muscle. According to our investigations, it is of preeminent importance to consider how to avoid the negative effect of the operation (with particular consideration of the arthroscopic procedure) on the function of the thigh musculature.

Adult↗
PubMed1992

[The effectiveness of physical therapy techniques. Possibilities of electromyography evaluation].

The purpose of this study is to verify the efficiency of selected physiotherapeutic techniques. EMG analysis with surface electrodes was performed in order to obtain sufficient data about the process of local strain. Furthermore, the local strain of the muscles surrounding a healthy knee is compared with the local strain of muscles after a knee injury (ACL-rupture) with resultant atrophy. The results prove modifications of progress and amplitudes of local strain and of coordination affected by atrophy/non-atrophy. On account of the first results additional research is recommended to investigate the specific aims of the different techniques.

Anterior Cruciate Ligament↗
PubMed1987

[Technic of synovectomy in the infected knee joint].

In case of early diagnosis as well as correct indication and operation technique, synovectomy is an essential part in the treatment of an infected knee joint. The new formation of the synovia has been demonstrated by clinical/empirical as well as experimental studies, so that the alimentation of the cartilage can be normalized. Postoperative scarring due to adherence has to be prevented by continuous therapeutic exercises. In case of severe early infections, already existent severe cartilage lesions, and fibrous ankylosis, arthrodesis by means of external fixation is the method of choice. In these cases neither a healing of the infection nor a satisfactory function of the knee joint can be expected after the application of synovectomy.

Arthritis, Infectious↗
PubMed1986

[Etiology and pathophysiology of post-traumatic bone infection].

The present study deals with etiology and pathophysiology of posttraumatic bone infections. Great importance is attached to the description of intracortical transformations. The authors underline that the chronic infection originates in disturbances of blood flow caused primarily in the corticalis by trauma or osteosynthesis. All further pathophysiologic processes have to be considered as an effort made by the organism to heal the damage. The pathophysiologic processes resulting in the different end stages (recovery, persisting necrosis, sequester) are described.

Bone Regeneration↗
PubMed1984

Comparative osteological-angiological investigations of non-decalcified bony tissue.

A method of investigation on non-decalcified bony tissue is discussed. This method combines the advantages of micro-angiological procedures with those of osteological investigations. By use of this method, a good assignment of angiological results to the differential interference contrast film is possible. The application is indicated for particular osteomyelitis types that are rich in blood vessels, and for some bone tumours.

Bone and Bones↗
PubMed1981

[Theoretical basis and clinical experiences in stabilizing the tibia by means of the external fixator (author's transl)].

This paper deals with the stabilization of the tibia by means of the external fixator in special problematic cases. Indication, surgical technique and postoperative care are presented as the result of theoretical investigations and the clinical experience of several years. It is pointed out that the external fixator is a supplementary method to the standard surgical technique.

Biomechanical Phenomena↗
PubMed1980

[Alloarthroplasty, resection-arthroplasty and arthrodesis of the shoulder-joint--indications and technic (author's transl)].

Indications and operative technics of problematic situations in the shoulder region are discussed. Methods which are commonly used at the "BG"-Accident-Hospital, Duisburg, are described in detail. Operative methods under question are arthroplasty, resection-arthroplasty and arthrodesis. The indications for the individual operative procedures are presented. Particular emphasis is laid upon the faction are discussed. Methods which are commonly used at the "BG"-Accident-Hospital, Duisburg, are described in detail. Operative methods under question are arthroplasty, resection-arthroplasty and arthrodesis. The indications for the individual operative procedures are presented. Particular emphasis is laid upon the faction are discussed. Methods which are commonly used at the "BG"-Accident-Hospital, Duisburg, are described in detail. Operative methods under question are arthroplasty, resection-arthroplasty and arthrodesis. The indications for the individual operative procedures are presented. Particular emphasis is laid upon the fact that alloarthroplasty--because of still unsolved technical problems--retains only a very narrow indication. It should be limited exclusively to older patients. Details of the operative technic for various operations are described. Apart from the common resection of the humoral head these are technically difficult; they require a surgeon who is experienced in traumatology and orthopedics.

Arthrodesis↗