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Biomedical subjects

J M Pisco

Publications and source records attributed to J M Pisco.

33 records · Page 2Linked to original sources
PubMed1980

Multidisciplinary approach to the diagnosis of hepatoblastoma: ultrasound, nuclear medicine, and angiography.

This report demonstrates the findings of angiographic, nuclear medicine, and ultrasonic examinations in a case of primary liver neoplasm (hepatoblastoma). The use of a multidisciplinary approach pin-pointed the neoplasm and guided a liver biopsy for subsequent tissue diagnosis. The patient is now undergoing radiation therapy, with monitoring by serial ultrasonic examinations.

Carcinoma, Hepatocellular↗
PubMedDate not supplied

Vasa vasorum changes following stent placement in experimental arterial stenoses.

PURPOSE: Experimental stenoses were created in canine aortae to compare the effects of stent placement and balloon angioplasty on the vasa vasorum. MATERIALS AND METHODS: A balloon-expandable Palmaz stent was placed in the proximal stenosis, and angioplasty was performed in the distal stenosis in each of eight dogs. Two dogs were killed at 4, 8, 12, and 18 months, respectively. Specimens were studied by means of microangiography, histology, scanning electronic microscopy, and Spalteholz technique. RESULTS: At up to 12 months, there was proliferation of the vasa vasorum and a rich plexus formed in each of the animals at each treated site. More vasa vasorum were seen after stent placement than after angioplasty. The new vessels were mainly venules located in the media. At 18 months, there was regression of the venules and the vasa vasorum distribution returned to baseline. CONCLUSION: The authors conclude that the effects of stents on the vasa vasorum are temporary.

Animals↗
PubMedDate not supplied

Changes in the vasa vasorum following percutaneous transluminal angioplasty in a canine model of aortic stenosis.

PURPOSE: To investigate the effects of percutaneous transluminal angioplasty on the vasa vasorum in dogs with experimentally created abdominal aortic stenoses. MATERIALS AND METHODS: Two stenoses were created in the abdominal aorta in each of 21 dogs. After 6 weeks, the more cephalic stenosis was dilated; the other stenosis served as an untreated control. Groups of three dogs were killed at 24 hours, 3 and 6 weeks, and 4, 8, 12, and 18 months after angioplasty. The aortae were studied by means of histologic examination, microangiography, scanning electron microscopy, and the Spalteholz technique. RESULTS: At nondilated stenoses, the vasa vasorum was interrupted in the outer adventitia and unchanged in the outer media. At dilated stenoses, the number of precapillary arterioles in the outer media progressively increased up to 8 months; thereafter, the number of precapillary arterioles began to decrease. At 18 months, the number was normal. CONCLUSION: Angioplasty brings about changes in the number of precapillary arterioles in the outer media of the aorta in our canine model of focal abdominal aortic stenosis.

Angioplasty, Balloon↗
PubMedDate not supplied

[The embolization of complicated renal angiomyolipoma].

A case of complicated renal angiomyolipoma with tumoral bleeding in a 44-year-old woman is presented. The contribution of angiography to the diagnosis helped clarify the degree of vascularity, and the contribution of embolization treatment (safe and well tolerated) is discussed.

Adult↗
PubMedDate not supplied

[Endoprosthesis in the treatment of renovascular hypertension].

Stents were placed in the renal artery in 6 patients, with renal artery stenosis and hypertension, 2 of them had azotemia. The indications were residual stenosis greater than 30% (4 cases) and restenosis following angioplasty (2 cases). The technique and results are described. Cure or improvement of arterial hypertension was obtained in 5 patients and normalization of creatinine in 2 patients with azotemia. We conclude that stent placement improve the immediate and late results of renal angioplasty.

Blood Vessel Prosthesis↗
PubMedDate not supplied

[Endovascular treatment of iliac artery aneurysm].

The authors report a case of an aneurysm of the common iliac artery of atherosclerotic etiology, treated by percutaneous endoluminal stent-graft placement. They describe the technique and review the medical literature.

Aged↗
PubMedDate not supplied

[Therapeutic angiography].

After a brief reference to the most important pioneers of angiography, the author describes the techniques performed, lesions treated and future perspectives. The following techniques are performed: embolizations, selective infusion of drugs, placement of inferior vena cava filter, removal of intra-vascular bodies, revascularisation techniques and porta-cava shunt. Reference was made to the following lesions treated: tumours, hemorrhages, arteriovenous malformations, hypersplenism, pulmonary embolism, varicocele, ischemic lesions and portal hypertension.

Angiography↗