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Biomedical subjects

P Linhart

Publications and source records attributed to P Linhart.

At least 37 records · Page 2Linked to original sources
PubMed1983

[Laparoscopic sonography. A new dimension in the diagnostic approach to internal organs].

A newly developed laparoscopic sonography probe was used for assessment of upper abdominal and retroperitoneal organs. A linear array instrument with a frequency of 7 MHz was used. The cross-sectional width is 3.5 cm and the high frequency permits excellent dissolution. Thus the accepted loss of penetration depth is fully compensated by the possibility of placing the probe directly onto the organs. This method seems to be particularly suitable for detailed assessment of intraabdominal and retroperitoneal organs and of pathological changes. Laparoscopic ultrasonography-directed collection of tissues for histologic evaluation is equally easily done.

Abdomen↗
PubMed1983

[Bow artefact in B-image sonography].

Bow-shaped artifacts can often be seen in B-mode-ultrasound examinations. In order to find out the origin of these artifacts, water tank experiments were carried out and compared with in vivo observations. The studies showed that bow-shaped artifacts are caused by beam breadth, and that their shape is influenced by the type of the B-mode-instrument, the adjustment of the machine, and by the shape of the reflector. In vitro and in vivo, bow-shaped artifacts arise at strong reflectors and are visible in regions of low echogeneity. In vivo bow-shaped artifacts may imitate pathological findings such as septa or sludge.

Ascites↗
PubMed1982

[Necrotising pancreatitis after ultrasonically guided fine-needle aspiration biopsy].

Complications after transcutaneous ultrasonically-guided fine-needle aspiration biopsy of the pancreas are exceedingly rare, although published reports mention transitory changes in pancreatic enzymes. Acute necrotising pancreatitis has not previously been reported. It developed in a 40-year-old woman after out-patient fine-needle biopsy because of a space-occupying lesion in the head of the pancreas. Immediate conservative treatment favourably affected the course of the disease, as documented by serial ultrasound and computer tomography. This serious complication suggests that strictest indications for this procedure must be used, together with careful technique of biopsy and strict observation of the patient, if necessary with a brief period of hospitalisation.

Acute Disease↗
PubMed1982

[Prerequisites for offering ultrasound services in general practice].

In the course of the past few years, sonography has become firmly established in clinical practice. The accuracy of the investigations does not only depend on the quality of the equipment used but also to a considerable degree on the standards of investigator training. To reduce the discrepancy between the number and quality of the investigations in the German Federal Republic, the "Kassenärztliche Vereinigung" has released guidelines requiring the users of sonographic equipment to undergo theoretical and practical training. These guidelines are reviewed and commented.

Curriculum↗
PubMed1979

[Sonography and pharmacoangiography of the pancreas (author's transl)].

Real-Time-Sonography and pharmacoangiography with vasodilating drugs was performed in 63 patients with suspected pancreatic disease. Confirmation of the pancreatic lesion could be obtained in 41 cases by the symptomatology, pancreatic function test, autopsy, operation, laparoscopy with fine-needle-biopsy and by the roentgenologic visualization of pancreatic calcifications. Considering the relatively advanced disease of pancreatic carcinoma in our six patients the sonographic diagnosis was correct in all of them and with pharmacoangiography we failed on one case. In chronic pancreatitis correct diagnostic results with pharmacoangiography could be obtained in 8 of 18 cases and with sonography in 14 of 18 patients. In this study sonography showed certain advantages in comparison with angiography, but both methods were complementary and a better result in the differential diagnosis between chronic pancreatitis and pancreatic carcinoma could be achieved.

Chronic Disease↗