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Biomedical subjects

W Knopf

Publications and source records attributed to W Knopf.

27 records · Page 2Linked to original sources
PubMed1987

[Penetrating craniocerebral injury].

Through a ten-year period, treatment was applied to 145 patients for open craniocerebral injuries in the calottal region. Mortality amounted to 35 per cent and postoperative infections to 16 per cent. Early or, in cases of intracranial invasive growths, immediate surgery with purpose-oriented osteoplastic trepanation is the optional method.

Adolescent↗
PubMed1987

[Instrumentation for hollow screw osteosynthesis of basal dens axis fractures].

The trend in the treatment of odontoid bone fractures is characterized by progressive application of operative methods. Special instruments for the fixation of odontoid bone was developed. Due to the ventral extraoral approach odontoid bone is possible to fix temporary with two rigid Kirschner wires by these hollow screws drilled from the ventral lower edge of the second vertebral body through the fracture in the odontoid bone. By using this method the operative procedure is much more safety as well as the x-ray exposure of the patient and of the operating team is reduced.

Axis, Cervical Vertebra↗
PubMed1986

Extended use of the internal mammary artery graft: important anatomic and physiologic considerations.

Of 336 isolated coronary artery bypass procedures performed over an 11 month period, one internal mammary artery (IMA) was used in 81% of cases. In 41 patients, two IMAs were used for grafting three or more arterial segments in single or sequential fashion. Repeat coronary arteriography was performed in 26 of these patients 7 to 10 days after bypass surgery. The left IMA in situ was used either singly or sequentially to graft the left anterior descending (LAD) and diagonal arteries and all branches of the circumflex system. The right IMA was used to graft the LAD, diagonal, mid marginal, right, and posterior descending branch of the right coronary artery. Blood flow to a grafted arterial segment occurred primarily through the IMA in situ in 61% of segments bypassed but was equally distributed through the IMA graft and native circulation in 35%. This was in contradistinction to the free IMA and saphenous vein graft, in which the majority of flow was via the graft in 86% and 94% of grafted segments, respectively. For those instances in which major flow was via the IMA graft in situ, the mean diameter reduction of the proximally grafted arterial segment was 83% vs 63% for those segments in which flow was equally shared between native coronary and IMA graft (p less than .05). There was a trend, although not statistically significant, for increasing flow to occur via the native circulation if the first anastomosis in a sequential IMA graft in situ was performed to a larger artery than the distally grafted segment. This was especially true when there was low-grade stenosis in the proximally grafted arterial segment.(ABSTRACT TRUNCATED AT 250 WORDS)

Coronary Circulation↗