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Biomedical subjects

V K Ryzhkov

Publications and source records attributed to V K Ryzhkov.

At least 19 recordsLinked to original sources
PubMed2004

[Original nitinol monowire stent for percutaneous iliac arterial reconstructions].

Nitinol monowire stents of original construction were implanted to 35 patients (aged from 36 to 84, mean 53.9) with atherosclerotic lesions of iliac arteries. Arterial stenosis ranged from 50% to 100% (mean 72.2%), ankle-brachial index (ABI) averaged 0.45+/-0.12. Initial success was achieved in 97.1% of procedures. Ultrasonography 3 days since the procedure showed the increase of ABI up to 0.78+/-0.16. Restenoses in the stented site was revealed during follow-up period (mean 24.3+/-18.3 months) in 3 patients (8.3%). In conclusion, new stent appeared to be effective tool for treatment of iliac atherosclerotic lesions. However long-term restenoses resulting from intimal hyperplasia can require repetitive revascularization.

Adult↗
PubMed2002

[Endovascular intrahepatic portacaval shunting].

Pilot experience in Russia of transjugular intrahepatic portosystemic shunting is presented. Results of endovascular shunting in 14 patients with cirrhosis of the liver were analyzed. Four patients underwent emergency endovascular shunting when conservative treatment was not effective. Ten patients underwent elective surgery. Repeated esophagealgastric bleedings were indications for shunting. Relapse of bleeding was seen in 1 patient 5 days after surgery. Regular dopplerography permitted to reveal timely stenotic process. When stenosis of portosystemic shunt was diagnosed, ambulatory balloon dilatation of anastomosis through transjugular approach was performed. It was enough for opening of anastomosis lumen and decrease of pressure gradient.

Adult↗
PubMed2001

[Role of spermatic vein phlebography and scleroembolization in treating varicocele and preventing its recurrence].

The phlebograms and intravascular treatment of varicocele were performed in 406 patients aged from 10 to 60 years. Scleroembolization of the left internal spermatic vein was successfully used in 402 of them. Dilatation and retrograde flow through the right internal spermatic vein were recorded in 101 of 238 patients during transjugular catheterization. This investigation has confirmed high effectiveness of the method of the intravascular combined scleroembolization in treatment of varicocele. Using the transjugular access facilitates not only performing the left side intervention but represents the only efficient means to fulfill the right side phlebography of the spermatic vein and its obliteration. The strategy of using the bilateral intervention for the detection of retrograde contrast of the right internal spermatic vein considerably improves the results of treatment of varicocele and decreases risk of relapses.

Adolescent↗
PubMed1999

[Arteriography in critical changes in the iliac arterial bed].

The authors share their experiences with performing arteriography in 33 patients with spread atherosclerotic occlusions of the iliac vessels. When the traditional accesses were not possible, accesses through the explant (in 22 patients) and the occluded artery (in 11 patients) were used. Investigations with the simultaneous portional administration of heparin were fulfilled in 27 patients with progressing ischemia of the lower extremities and in 6 patients having anastomosis aneurysms. No complications were noted. The femoral access is thought to be preferable in order to reduce the amount of local complications. The experience and up-to-date technical equipment allowed the recanalization of the iliac arteries to be successfully fulfilled which turned the diagnostic measures into the curative endovascular intervention in some patients.

Adult↗
PubMed1998

Extraorganic hepatic artery aneurysm: failure of transcatheter embolization.

Hepatic artery aneurysm (HAA) was diagnosed in a 62-year-old man who was a poor candidate for surgery because of severe liver cirrhosis and diabetes mellitus. Two attempts to occlude the HAA by transcatheter embolization failed because of recanalization of the aneurysm. Moreover, aneurysmal dilatation of the superior mesenteric artery and the left renal artery developed and progressed. Both the literature and the present case show that an individual approach to treatment of extraorganic HAA should be chosen in dependantan location and anatomy of the lesion.

Aneurysm↗
PubMed1997

Pelvic pain syndrome caused by ovarian varices. Treatment by transcatheter embolization.

PURPOSE: The aim of this study was to evaluate the clinical effect of therapeutic embolization in the pelvic congestion syndrome caused by ovarian varices. MATERIAL AND METHODS: Six women, aged 25-40 years, with pelvic pain syndrome and marked left (n = 5) or bilateral (n = 1) ovarian varicocele were treated by transcatheter retrograde venous embolization. RESULTS: The pelvic pain syndrome disappeared in all patients within 4 weeks, and there was regression of the periodic pain in 2 women with dysmenorrhoea. The patients were free of symptoms during the 1-4-year follow-up. CONCLUSION: Marked ovarian varices may cause a pelvic pain syndrome. Percutaneous embolization improves both the chronic pain and the dysmenorrhea in these patients. Transcatheter treatment could be considered as an alternative to surgical or laparoscopic ligation in ovarian varicocele.

Adult↗
PubMed1997

[The large-pore stent in the treatment of abdominal aortic aneurysms].

The authors have performed 8 endoprostheses for aneurysms of the abdominal segment of the abdominal aorta. The open cellular stent of nitinol was implanted with diameter 32 mm, bringing system 9.0 F. The implantation was carried out without problems in 7 patients, in one patient there was dislocation of the distal fragment of the endoprosthesis which required surgical intervention. The average time of operations was (7.6 +/- 4.5) min. The open stent allowed the invasiveness of operation, its technical complexity and duration to be reduced.

Aged↗
PubMed1992

Arterioportal fistulas (APF) in liver tumors: prognosis in relation to treatment.

Prognosis of 16 patients with hepatic tumors and angiographically proven arterioportal fistulas was analysed in relation to treatment. Six patients received only conservative therapy; they all died of variceal bleeding in the course of two months after angiography. Hepatic resection was performed in four patients; three of them are still alive 13-52 months later including two free of both the tumor and portal hypertension. Hepatic artery embolization was carried out in six patients. All of them died in 2-36 months after the procedure, but only two from gastroesophageal hemorrhage. It is concluded that prognosis of arterioportal fistulae in liver neoplasms is poor due to hyperkinetic portal hypertension and following variceal bleeding. Hepatic resection of both the tumor and the fistula is the treatment of choice. In unresectable cases hepatic artery embolization will decrease the risk of variceal hemorrhage.

Arteriovenous Fistula↗
PubMed1991

[Embolization of the hepatic artery in the treatment of malignant tumors of the liver].

The results of therapeutic hepatic artery embolization (HAE) in 25 patients with malignant unresectable tumors of the liver are discussed. The proximal segments of the hepatic artery were occluded by metal spirals. Thrombosis of the portal vein was accepted as an absolute contraindication for HAE, and a tumor involving more than 50% of the volume of the liver and chronic hepatic insufficiency were considered relative contraindications. After the intervention signs of subjective improvement were noted in 73.9% and signs of objective improvement in 65.2% of cases. The mortality after HAE was 4.2%. The obtained results are evidence of the efficacy of proximal HAE as a method for the treatment of inoperable malignant tumors of the liver.

Adenoma, Bile Duct↗
PubMed1991

[Long-term results of the embolization of the hepatic and splenic arteries in liver cirrhosis].

The authors studied the long-term results of portal hypertension correction in patients with far-advanced stages of cirrhosis of the liver. Embolization of the hepatic and/or splenic arteries was performed in 231 patients (147 males and 84 females) aged from 17 to 70 years. Sixty-seven patients are alive at present, the average duration of the follow-up period is 57.9 +/- 19.8 months. Four patients were not followed up; 160 patients died, 18 (7.8%) of them within 30 days after an endovascular manipulation. The mean survival of patients who were discharged from the clinic was 21.1 +/- 17.4 months. Survival was higher among patients treated by successive embolization of the hepatic and splenic arteries than in those treated by occlusion of one of these vessels. Comparative analysis showed that embolization of arteries of the hepatolienal zone prolongs the life of patients with complicated forms of portal hypertension in cirrhosis of the liver.

Adolescent↗
PubMed1990

[Potentialities of angiography in the diagnosis and treatment of angiosarcoma of the liver].

Clinicoroentgenological evidence is described for 3 patients with nonresectable hepatic angiosarcoma. Two of these underwent therapeutic embolization of hepatic artery. Differential diagnosis between angiosarcoma and other hepatic malignancies by angiographic images seems impossible. Hepatic artery embolization can be employed as palliative treatment of advanced angiosarcomas.

Adult↗
PubMed1990

[Blood supply of malignant tumors of the liver after embolization of the hepatic artery].

Repeated angiographic studies (10 arteriographies, 3 percutaneous transhepatic portography) were performed in 10 patients with malignant tumors of the liver 5-20 months after embolization of the hepatic artery. The ++roentgenological data obtained and results of 3 autopsies enabled the authors to make a conclusion that blood supply of malignant tumors of the liver after embolization of the hepatic artery remains mainly of arterial type.

Angiography↗
PubMed1990

[Value of oil angiography of the kidneys in obtaining long-term contrast visualization of kidney tumors].

Angiographic examinations with oil roentgenopaque drug iodolipol were performed in 151 patients with tumors of the kidneys. Selective accumulation of iodolipol in the zones of malignization was revealed. No complications resulting from the administration of the drug were observed. Embolization of the renal artery was followed by shrinkage of the malignant tumor which practically stopped within 10-14 days.

Adult↗