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A Benini

Publications and source records attributed to A Benini.

140 records · Page 8Linked to original sources
PubMedDate not supplied

Left-to-right shunts. (Quantification, mathematical methods and their statistical comparison).

This work describes a non-traumatic technique for quantitative determination of left-to-right shunts. Various mathematical methods to evaluate the radioisotope concentration lung curve are considered. Data were collected with a gamma camera system connected to a computer. The first results were obtained from 18 patients at the Ospedali Riuniti in Parma, Italy. All the mathematical processes are described. The three methods used were based on: 1. the count ratio (C2/C1) between two pulmonary activity concentrations, 2. the gamma function fitting, 3. decreasing exponential. A comparison of the three methods shows that the gamma function method is the most reliable. In this kind of investigation the patient's radiation dose is low enough for it to be repeated so that the course of the disease can be followed.

Child↗
PubMedDate not supplied

[Lumbar diskectomy without or with spondylodesis? Revival of an old dilemma].

Indications for spine fusion in combination with removal of a lumbar intervertebral disc are not as well defined or as widely accepted. Extreme opinions have been expressed on both side of this issue, but it seems unreasonable that every segment should be fused after removal of a disc or that none should be. The indication for fusion or for no fusion is often based on the specialist to whom the patient is referred. Orthopedists perform often fusion, neurosurgeons rarely. The problem is not the superiority of combined operation or simple disc excision, but the right indication for one or other procedure. It is clear that for the patient with acute disc displacement with leg-pain as the predominant symptom, simple laminectomy and disc excision will yield good results in most cases. Basically the are two indications for combined operation: the first of this is a strong history of instability troubles prior to the disc prolapse; second indication is the bilateral hemilaminectomy and discectomy, which can lead the spine quite instable. Indication for secondary spinal fusion are: 1) the presence after disc excision of complain of pain in the back with relatively little sciatic radiation, sometimes as intermittent claudication; 2) the overproduction of scar tissue is seen very often in instable segment after disc excision and partial or complete facetectomy. Decompression of the nerve root and fusion may result in a great benefit. Finally we recall the possibility to perform simple fusion in flexion without excision of the disc and without laminectomy in cases with median protrusion of the disc, seen in CT in patients with chronic low back pain and inconstant radicular pain radiation. We describe our own technic of combined operation.

Humans↗
PubMedDate not supplied

[Lumbar spondylolisthesis with radicular compression symptoms; guide lines for diagnostic clarification and for conservative and surgical treatment].

The clinical picture presented by cases of lumbar spondylolisthesis with radicular symptoms looks like to the displacement of the intervertebral disc. In Spondylolisthesis of the fourth lumbar vertebra the fourth and/or the fifth roots are involved, in slipping of the fifth vertebra the fifth lumbar and/or the first sacral roots. The mechanisms of the radicular involvement are discussed. The physiotherapy and the surgical treatment are presented. The surgical treatment entails decompression of the suffering nerve roots without spinal fusion. The results are satisfactory.

Adolescent↗