Biomedical subjects

P De Maeyer

Publications and source records attributed to P De Maeyer.

7 recordsLinked to original sources

PubMed1985

Intravenous ionic contrast media cause local prostacyclin release in man.

The effect of intravenous administration of ionic contrast media on local release of prostacyclin (PGI2) was investigated in man. Iodamide and ioxaglate, high- and low-osmolality contrast media, respectively, both significantly increased PGI2 levels at the site of injection. Iodamide was the most active, whereas an identical volume of isotonic saline had no effect. This study suggests that local formation of PGI2 may adequately reflect the degree of endothelial irritation that is caused by contrast media and that depends in part on their osmolality.

Contrast Media↗

PubMed1983

[Intravenous digital subtraction angiography following surgical vascular interventions and percutaneous transluminal angioplasty].

I.V.D.S.A. was performed as a follow-up after a surgical vascular procedure or a percutaneous transluminal angioplasty in 157 patients. The quality of the intravenous angiography was excellent in 91% of the patients. In 6,6% the examination was sub-optimal with possible error and in 2.4% the examination was not diagnostic. The inherent limitations of the technique are less important in these follow-up examinations because a limited region only has to be examined. A more accurate follow-up of vascular procedures is possible with I.V.D.S.A.

Angiography↗

PubMed1983

[Digital intravenous subtraction angiography as a screening method in patients suspected of having renovascular hypertension].

Since January 1982 we combine urography in hypertensive patients with intravenous angiography of the renal arteries. In the first 20 patients examined by this new method, we also performed conventional intra-arterial angiography to evaluate the accuracy of the intravenous examination. In more than 80% of 104 patients the examination was of good diagnostic quality and both renal arteries were well visualized. I.V.D.S.A. has a lower morbidity and cost than conventional angiography. It is more accurate than urography and therefore gives us the possibility of a better screening of hypertensive patients.

Angiography↗

PubMed1982

CT demonstration of perirenal lymphatic cysts.

A case of perirenal lymphatic cysts demonstrated by computed tomography is reported. These lymphatic cysts, a histological subtype of lymphangiomata, are clearly visible as collections with clear fluid-type density surrounding both kidneys. The retroperitoneal localization of this rarity has been reported in the radiological literature, whereas, to our knowledge, the radiological demonstration of the perirenal localization has not. CT provides a unique method for direct radiological visualization of the cyst.

Adult↗

PubMed1982

A clinical study of 99mTechnetium dimercaptosuccinic acid uptake in obstructed kidneys: comparison with the creatinine clearance.

We studied 17 hydronephrotic kidneys owing to stenosis of the pyeloureteral junction. Preoperative uptake of 99mtechnetium dimercaptosuccinic acid was compared to early postoperative unilateral creatinine clearance, measured by urine collection from the nephrostomy tube. An excellent correlation was found. Therefore, uptake of 99mtechnetium dimercaptosuccinic acid represents a reliable parameter of renal function even in the presence of severe urinary tract obstruction. However, 99mtechnetium dimercaptosuccinic acid uptake should be measured more than 24 hours after injection of the tracer.

Adolescent↗

PubMed1981

Polysplenia.

A case of polysplenia associated with total abdominal situs inversus, central localization of the liver, and incomplete development of the inferior vena cava is reported. Various components of the syndrome were easily demonstrated by CT.

Abnormalities, Multiple↗

PubMed1981

Prevention of vasospasms during extensive renal surgery. An experimental study in rats.

Six methods for prevention of renal arterial vasospasms, due to extensive surgical trauma are compared in an experimental study in rats. The 'proximal transit time' was chosen as a measure for renal arterial flow 1, 5, 10 and 15 min after a standard surgical trauma. Xylocaine infiltration around the renal pedicle was least effective. Hydration of the rat, preoperative mannitol perfusion, and preoperative phenoxybenzamine treatment gave comparable effects and were significantly better than no treatment. The topical application of papaverine (1 mg/kg) around the renal pedicle did significantly better than the above-mentioned methods. The most effective treatment, however, was the combination of hydration, mannitol perfusion and papaverine application around the renal pedicle.

Animals↗