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Results for “RENAL VEINS”

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At least 19 recordsLinked to original sources
PubMed1993

Changes in renal vein, renal surface, and urine oxygen tension during hypoxia in pigs.

To determine whether ureteral urine oxygen tension could serve as a monitor of renal hypoxia and its relationship to other renal O2 tension parameters, we simultaneously measured femoral artery (PaO2), renal vein (PrvO2), renal surface (PrsO2), and ureteral urine (PuO2) oxygen tensions in 8 anesthetized pigs while incrementally decreasing the inspired oxygen concentration (FiO2) from 21% to 12%. Renal artery blood flow, measured by transit time ultrasound, renal oxygen consumption, and thermodilution cardiac output, was constant. Changes in PaO2, PrvO2, PrsO2, and PuO2 caused by decreasing FiO2 were evaluated by one-way analysis of variance. The relationships between PuO2 and the other O2 tension parameters were evaluated by correlation coefficient and linear regression statistics. Of six possible O2 decrements (combinations of 3, 6, and 9%), only PrvO2 significantly decreased with all six decrements. PuO2 decreased when FiO2 decreased 6% or more. PuO2 is not a sensitive indicator of systemic hypoxia. Under constant renal perfusion and oxygen consumption, PuO2 had a correlation coefficient of 0.80 and a regression equation of PuO2 = 0.84 (PrvO2) + 11.6, with PrvO2. PuO2 is related to PrvO2 when renal perfusion is constant.

Animals↗
PubMedDate not supplied

Retroaortic left renal vein with renal vein hypertension causing hematuria.

We describe a case of retroaortic left renal vein with hematuria. In this case, pullback pressure from the retroaortic left renal vein to the inferior vena cava revealed left renal vein hypertension according to criteria of the "nutcracker phenomenon." We stress that left renal vein anomaly including retroaortic left renal vein can cause clinical symptoms such as hematuria.

Adolescent↗
PubMed1975

Location of aldosterone-producing adenomas by the determination of plasma aldosterone in adrenal vein or renal vein blood.

1. Aldosterone-producing adenomas were located before operation in eighteen patients by comparison of aldosterone concentrations in blood obtained by percutaneous catheterization of the adrenal vein or renal vein. The concentration of aldosterone in the venous effluent from the adrenal glands containing adenomas was significantly greater than in the venous effluent from contralateral glands. 2. Cathetherization of the adrenal vein is, however, technically difficult. The location of adrenal adenomas was also possible by analysis of blood from the renal vein. 3. If the concentrations of aldosterone in blood from the left renal vein were higher than those from the right, the existence of a left adrenal adenoma was suggested. A high value in plasma, obtained from the inferior vena cava above the entry of the right adrenal vein, showed a right adrenal adenoma. This procedure identified very small functional adenomas which could not be demonstrated radiographically, or seen or palpated at surgery. 4. It was concluded that differential aldosterone measurement after percutaneous bilateral adrenal vein or renal vein catheterization can be used as a definitive test for the location of an aldosterone-producing adenoma, where this is uncertain.

Adenoma↗
PubMed1978

[Effect of combined exposure to hypokinesia and gravitational stress on the structure of the wall of the renal vein].

Renal veins from 25 rabbits were investigated by means of imbedding in paraffin with subsequent hematoxylin--eosin staining, after Van Gieson and with fuchselin after Hart. Prolonged hypokinesia (over 3 weeks) with subsequent single application of gravitational overloading was stated to produce some structural changes in the wall of the renal vein. They are manifested as loosening of the middle vascular sheath with vacuolization of myocytes and outgrowth of its elastic elements. Hypokinesia of longer duration (8 weeks) with subsequent gravitational overloading produces atrophy of smooth muscle tissue in the middle sheath of the venous wall that brings about decreasing in tonus of the wall of the renal vein.

Animals↗
PubMedDate not supplied

Aortic and inferior vena cava resection for renal cell carcinoma invading an aberrant renal vein.

Renal cell carcinoma which invades the renal veins is a frequent complicating factor in radical nephrectomy. In a 53-year-old patient with a left renal cell carcinoma, tumor thrombus was present in an aberrant, retroaortic left renal vein, and "en bloc" resection of the overlying aneurysmal aorta with a cuff of inferior vena cava was required. The aorta was reconstructed with a dacron bifurcation graft to the iliac arteries, and the vena cava closed primarily. The patient made an uneventful postoperative recovery. The requirement for extensive aortic and vena cava resection need not compromise attempts to cure locally advanced renal cell carcinoma.

Aorta, Abdominal↗
PubMed2002

Distal inferior mesenteric veins to renal vein shunt for treatment of bleeding anorectal varices: case report and review of literature.

Isolated intractable bleeding from anorectal varices is a rare complication of portal hypertension. We report a case of a patient with cirrhosis and hepatofugal flow who had severe lower gastrointestinal bleeding from anorectal varices. This is the first case report of construction of a distal inferior mesenteric vein shunt to left renal vein as a selective shunt for treatment of bleeding anorectal varices in a patient with hepatofugal flow. The patient is a 39-year-old white man with a medical history significant for alcohol abuse who was seen with bright red blood per rectum requiring 10 units of packed red blood cells over the course of a year. The work-up revealed anorectal varices with no other colonic lesions. The patient underwent construction of a distal inferior mesenteric vein to left renal vein shunt.

Adult↗
PubMed1999

Surgical technique for inferior mesenteric vein to renal vein shunt in portal hypertension.

An important role still exists for the creation of surgical portasystemic shunts. Multiple techniques have been described. However, no particular one is satisfactory for all clinical situations. The objective of the present paper is to describe an alternative surgical technique for the creation of a decompressive portasystemic shunt. This technique consists of an end-to-side anastomosis between the inferior mesenteric vein and the left renal vein. In our experience, the inferior mesenteric vein to left renal vein anastomosis may be a useful portal decompressive shunt for patients with otherwise difficult peri-portal or peri-pancreatic anatomic exposures. This technique should be a useful tool in the armamentarium of surgeons dealing with patients who need portal decompressive surgical shunts.

Anastomosis, Surgical↗
PubMed1979

[Nephrotic syndrome and unilateral thrombosis of the renal vein. Acute renal failure and disturbances of the hemostasis (author's transl)].

The association of nephrotic syndrome and renal vein thrombosis has been increasingly reported in the literature due to the use of modern complementary explorative techniques. The incidence of renal vein thrombosis in the nephrotic syndrome varies according to the different authors. The pathogenesis of this association has been widely discussed and even though renal vein thrombosis has formerly been considered as one more cause of nephrotic syndrome, there are at present numerous arguments supporting the opposite thesis. A case of nephrotic syndrome and unilateral thrombosis of the renal vein in a patient with primitive extramembranous glomerulonephritis is reported. Blood coagulation studies revealed an initial hyperfibrinogenemia and a persistent decrease of factors V, VII, and X, with low rates of prothrombin. A thrombectomy was carried out, but the patient presented a Gram-negative sepsis without hypotension in the immediate postoperative period. As a consequence an acute renal failure developed and hemodyalisis was necessary for 2 months. The pathogenesis of both conditions are discussed.

Acute Kidney Injury↗
PubMed1983

Simultaneous sonographic demonstration of tumor thrombus in the inferior vena cava and patient main renal vein in renal carcinoma.

With the introduction of new imaging modalities the optimal protocol for the evaluation of renal tumors is under close review. Angiographers frequently are faced with the question of whether to proceed to inferior venacavography following a selective renal angiogram that demonstrates a patent renal vein. We report a case of renal cell carcinoma in which the main renal vein was shown by ultrasound to be unequivocally patent but at the same time there was considerable tumor extension into the inferior vena cava. The necessity of full examination of the inferior vena cava, either by venacavography or ultrasound, in all cases of renal cell carcinoma is stressed.

Adenocarcinoma↗
PubMedDate not supplied

[Prognostic value of isolated invasion of the renal vein in renal adenocarcinoma].

A total of 38 renal adenocarcinomas with isolated invasion of the renal vein and maximum local extension to perirenal fat, operated over a 20-year period and with long-term follow-up were reviewed. They were divided in two subgroups, 12 T1-2,N0,M0,V1 cases were compared to 54 T1-2,N0,M0,V0 cases treated in the same period of time, but no significant differences were found in survival (83% and 68% at 5 and 10 years for V1 versus 80% and 64% for V0); and 26 T3,N0,M0,V1 cases compared to 49 T3,N0,M0,V0, again with no significant difference found in survival (40% at 5 years and 26.5% at 7 years for V1, versus 38.5% and 34% for T3V0). When comparing the survival rate of T1-2,N0,M0,V0-1 with that of T3,N0,M0,V0-1, the difference was significant (p). It is concluded that the isolated invasion of the renal vein and an equal locoregional extension of the tumour do not modify the prognosis for renal carcinoma, and that this parameter should be included in the new TNM classification of the isolated UICC, since when included within the T3b category it places cases with good prognosis (T1-2 V1) above cases with poor prognosis due to the existence of invasion of the perirenal fat (T3a).

Adipose Tissue↗
PubMed1978

[Varicosities of the renal veins, the renal pelvis and the ureteric veins (author's transl)].

Varicosities of the renal veins and of the veins of the upper urinary tract may occur with or without haematuria. The urogram may be negative. Frequently, however, there are single or multiple impressions on the ureters as a result of the venous varicosities. Arteriography, which should always be carried out in the presence of undiagnosed haematuria, is unable to demonstrate the venous abnormalities. Since the symptoms are also not characteristic, it is necessary to carry out renal vein pharmaco-phlebography. The clinical features, radiological appearances and aetiology of this rare condition are illustrated by three cases.

Adult↗
PubMed2006

[Renal vein thrombosis--renal colic with unusual course].

Although renal vein thrombosis (RVT) is a complication of various renal and medical conditions, nephrotic syndrome is known as the most frequent one. RVT in patients suffering from nephrotic syndrome is rarely present with flank pain. Most patients are asymptomatic and recover spontaneously. The treatment of RVT consists of handling the primary condition and treating the thrombosis itself by anticoagulation. In severe cases with grave prognosis thrombolytic therapy is needed. This is a case study of a 38 year old male who presented with severe renal colic which subsequently diagnosed as RVT complication of the nephrotic syndrome. The article also reviews the literature regarding the frequency, etiological factors, pathophysiology, radiological diagnosis and disease treatment.

Anticoagulants↗
PubMed1993

Double left renal veins and multiple right renal veins found in Japanese adults.

A case of circumaortic renal venous collar, the first such collar to be observed in a Japanese female cadaver, is presented, and its anatomical organization is compared with that in another case in which four right renal veins accompanied four right and three left renal arteries in a Japanese male cadaver. Double left renal veins are formed by persistence of a more central retroaortic venous anastomosis, in contrast to multiple right renal veins, which are formed by persistence of some embryonic renal veins arranged in ladder-like patterns. In our case, the dorsal limb of the renal collar communicated with the azygos system veins and lumbar veins. The azygos system veins were considered to have atrophied as a result of some persisting retroaortic venous anastomoses located in the thorax. Therefore, we believe that the renal collar was related to the atrophy of the azygos system veins. To determine whether there are racial differences in incidence of renal collar, further studies in Asians are required.

Aged↗
PubMedDate not supplied

Caval extension of the right renal vein in cadaveric renal transplantation using the ETS 45 endoscopic stapler.

A major technical difficulty encountered with the transplantation of a cadaveric right kidney is due to the short right renal vein. The transplant surgeon usually has two different options to deal with this: the first is to mobilize the external iliac vein, ligating the internal iliac vein and the small retroiliac veins, while the second option is to increase the length of the right renal vein. Right renal vein extension is usually preferred because it is easier to work with. The technique used was to construct a conduit with the vena cava that extends the cadaveric right renal vein using an endoscopic stapler (Ethicon Endopath Linear Cutter ETS45, cod. TSW 45) for thin/vascular tissues. This procedure has been used successfully in 11 of our 155 transplanted patients. We have seen no vascular complications as a result of the stapled conduit of the vena cava. We conclude that the endoscopic stapler for thin/vascular tissues is safe and easy to use in right renal vein extension.

Cadaver↗
PubMed1991

Acute renal vein thrombosis in renal allografts: new Doppler ultrasonic findings.

We report two cases of renal vein thrombosis in renal transplants, both diagnosed by Doppler ultrasound. In both cases Doppler ultrasound showed complete absence of venous flow. In addition, the arterial signal showed a sharp systolic peak with a notch on the reverse diastolic component resembling an 'inverted M', a finding previously undescribed. This arterial waveform was present at both hilar and interlobar level. We postulate that this 'inverted M' sign may be more specific for renal vein thrombosis in that it may represent non-occlusive thrombus, despite the lack of detectable venous flow, whereas the previously described plateau-like reverse diastolic flow seen in some cases of renal vein thrombosis, also occurs in severe allograft rejection and is therefore a non-specific sign.

Acute Disease↗