Search PubMed⌕ Search

Biomedical subjects

N Walker

Publications and source records attributed to N Walker.

At least 145 records · Page 8Linked to original sources
PubMed1978

[Progressive slipping in severe spondylolisthesis-long-term observation (author's transl)].

In total consolidated dorsal fusion it is possible that the decreased intervertebral distance as well as the displacement can increase. 50 patients treated in the period from 1925 till 1977 with a spondylolisthesis of more than 50% have been reviewed. 36 of them were treated by a dorsal fusion, the 14 other patients without operation. Increased displacement was found in 43 cases. This phenomen will be brought about the deflective deformation of the dorsal fusion. Depending on the elasticity bone rebuilding under substinent biomechanical conditions is possible. In the course of time, total intercorporal consolidation leads to a difinitive stability and relief of pain.

Adult↗
PubMed1977

Experimental autologous transplantation of the knee joint: contributions of microvascular surgery (a preliminary report).

Free autologous transplantations of joints can be successfully performed, if careful microsurgical techniques are used. We have carried out autologous exchange transplants of the knee in 28 cats, anastomosing the vessels supplying the knee on one side and leaving the other side with no anastomosis as a control. The operational procedures and the general anaesthesia require special precautions. The permeability of a vascular anastomosis can be judged with scintigraphic and arteriographic techniques. The vascularization and bone remodeling as measured scintigraphically are in direct relation to the blood supply of the operated knee joints. Histological examinations have confirmed the clinical and radiographic findings.

Anesthesia, General↗
PubMed1977

[Radiological diagnosis of the narrow lumbar spinal canal syndrome (author's transl)].

31 myelograms of patients with the syndrome of lumbar spinal canal constriction were analysed. Two forms can be distinguished - a primary form with hypoplasia of the lumbar section of the spinal canal, and a secondary form with circumscribed constriction through olisthy or spondylosis deformans. The characteristics symptoms of the primary form (n = 21) are: difficult lumbar puncture, the ascent of the contrast medium in the thoracic section of the vertebral canal, multiple protrusions of the intervertebral discs, reduced sagittal diameter of the dural area which is marked by additional signs of spondylosis. In this connection, the alterations were so characteristic that it was possible to diagnose the condition even before the operation. The myelogram with water-soluble contrast-medium is considered to be markedly superior to other methods of radiological examination.

Adult↗
PubMed1977

[Clinical signs of the narrow lumbar spinal canal (author's transl)].

The syndrom of the narrow spinal canal is today to be separated from other lumbar diseases by its nosological entity. It starts slowly and becomes manifest in middle and advanced age. Claudicatio intermittens is the characteristic symptom of this disease the aetiology of which is multifactory. Most patients show in the myelogram konstitutionell alterations combined with localized or generalized degenerative narrowing of the spinal canal. The clinical findings correspond to the lumbar segments affected. With localized narrowing the differential diagnosis of disc herniation is generally possible by myelography. This is of therapeutic consequence because in this cases a removal of the disc is unnecessary.

Adult↗
PubMed1976

[The involvement of the position of the femoral head through intertrochanteric osteotomies (author's transl)].

The definition of capacity and strain of the hip joint has since Pauwels (1965 and 1973) been examined and quantitative and qualitative described by various authors. In the following it is attempted to state the relations between intertrochanter correction and the position of the hip joint, which enable a declaration on the dislocation of the main carrying zone of the head of femur. Factors and methods being complementary and such having an effect of contrary sence are thereat especially described.

Biomechanical Phenomena↗
PubMed1976

[Side reaction after lumbar myelography with dimer-x (author's transl)].

The existence of several very impressive spinal paroxysms after lumbar myelography with Dimer-X1 caused us to make a retrospective investigation of 327 patients with 355 myelographies. In 7.1% of the investigations we have found partly heavy, but mostly reversible neurological complications. The latter cannot be classified, contrary to prevailing statements, in spinal, meningeal or cerebral reactions, since mostly all 3 anatomical structures are being concerned. Corresponding casuistical information are being presented and with their neurological symptomatic discussed. The spinal paroxysms appeared approximately 6 hours after the myelography and lasted over 8-10 hours, in spite of intensive therapeutical efforts. The pathogenesis points to a multifactorial occurrence caused by the coincidence of an increased dosage of the contrast media, too bed rest time, rising of the contrast media in the spinal cord zone and disturbed liquor fluid circulation and contrast media resorption. Pathophysiologically is in connection with spinal cramps an epileptic mechanism probable. Additional spinal reflexive components could be an explanation for the little therapeutical effect of Diacepam (Valium), which is contrary to the statement in the literature. We have seen a better effect in particular cases with Phenothiazine. With strict observance of specific precautionary measures, the Dimer-X seems to be a good media for the presentation of the lumbar subarachnoid space. A further development in this field is desirable.

Adolescent↗