Severe portal vein thrombosis (PVT) is often considered a relative contraindication for living donor liver transplantation due to high associated risks and morbidity. Meanwhile, improvement in operative techniques, resulting in higher success rates has removed PVT from the list of contraindications in deceased donor liver transplantation (DDLT). In this report, we describe a surgical technique for DDLT using polytetrafluoroethylene graft from the inferior mesenteric vein for portal inflow in patient with portomesenteric thrombosis.
End Stage Liver Disease/complications/*surgery ; Humans ; Liver Transplantation/*methods ; Male ; Mesenteric Veins/surgery ; Middle Aged ; Polytetrafluoroethylene ; Portal Vein/*surgery ; Tissue Donors ; Treatment Outcome ; Ultrasonography, Doppler ; *Vascular Grafting ; Venous Thrombosis/etiology/*surgery/ultrasonography

OBJECTIVETo evaluate the predictive value of portal vein flow rate preoperative for portal vein thrombosis (PVT) after periesophagastric devascularization in hepatitis B cirrhosis-related portal hypertension.

METHODSFrom January 2007 to July 2008, 45 patients with portal hypertension caused by hepatitis B cirrhosis were performed splenectomy with peri-esophagogastric devascularization in the same medical group in West China Hospital of Sichuan University. The portal vein flow rate and the diameter of portal vein were measured with doppler sonography respectively before and after the operation. At the same time, the level of PT and PLT were detected. The weight of spleens were measured after operation.

RESULTSThirteen cases suffered from PVT postoperatively. Portal vein flow rate was significantly lower in patients with PVT postoperation than that in patients without PVT (P < 0.01). In patients with PVT (n = 13) postoperation, the preoperative portal vein flow rate was (19.5 +/- 5.3) cm/s. Among the 13 cases, there were 12 cases whose flow rate were lower than 25 cm/s, and 1 case whose flow rate was 32. 3 cm/s; In patients without PVT (n = 32), the preoperative portal vein flow rate was (9.6 +/- 8.0) cm/s. In patients with lower rate (n = 17), the incidence rate of PVT was 70.6%; in patients with higher rate (n = 28), the incidence rate of PVT was 3.6%. The incidence rate of PVT in patients with lower rate was significantly lower than patients with higher rate (P < 0.01). The diameter of portal vein in patients with PVT was significantly wider than patients without PVT. The diameter of portal vein was negative correlative with the portal vein flow rate. The value 25 cm/s was of diagnostic efficiency, the sensitivity was 92.3%, and specificity was 70.6%.

CONCLUSIONSThe portal vein flow rate preoperative can be used as an early predictor of portal vein thrombosis after periesophagastric devascularization in hepatitis B cirrhosis-related portal hypertension to give a guide to clinical work.

Adult ; Aged ; Blood Flow Velocity ; Female ; Humans ; Hypertension, Portal ; etiology ; physiopathology ; surgery ; Liver Cirrhosis ; complications ; Male ; Middle Aged ; Portal Vein ; diagnostic imaging ; physiopathology ; Postoperative Complications ; diagnosis ; etiology ; Preoperative Care ; Risk Factors ; Splenectomy ; Ultrasonography ; Venous Thrombosis ; diagnosis ; etiology

BACKGROUND: There are few comparative studies about the optimal method of pneumatic compression to prevent deep vein thrombosis (DVT). The aim of this prospective randomized study was to compare venous hemodynamic changes and their clinical influences between two graded sequential compression groups (an alternate sequential compression device [ASCD] vs. a simultaneous sequential compression device [SSCD]). METHODS: In total, 34 patients (68 limbs) undergoing knee and spine operations were prospectively randomized into two device groups (ASCD vs. SSCD groups). Duplex ultrasonography examinations were performed on the 4th and 7th postoperative days for the detection of DVT and the evaluation of venous hemodynamics. Continuous data for the two groups were analyzed using a two-tailed, unpaired t-test. Relative frequencies of unpaired samples were compared using Fisher exact test. Mixed effects models that might be viewed as ANCOVA models were also considered. RESULTS: DVT developed in 7 patients (20.6%), all of whom were asymptomatic for isolated calf DVTs. Two of these patients were from the ASCD group (11.8%) and the other five were from the SSCD group (29.4%), but there was no significant difference (p = 0.331). Baseline peak velocity, mean velocity, peak volume flow, and total volume flow were enhanced significantly in both device groups (p < 0.001). However, the degrees of flow and velocity enhancement did not differ significantly between the groups. The accumulated expelled volumes for an hour were in favor of the ASCD group. CONCLUSIONS: Both graded sequential compression devices showed similar results both in clinical and physiological efficacies. Further studies are required to investigate the optimal intermittent pneumatic compression method for enhanced hemodynamic efficacy and better thromboprophylaxis.
Aged ; *Arthroplasty, Replacement, Knee/adverse effects ; *Fracture Fixation/adverse effects ; Hemodynamics ; Humans ; *Intermittent Pneumatic Compression Devices ; Knee/surgery ; Prospective Studies ; Risk Factors ; *Spinal Fusion/adverse effects ; Spine/surgery ; Treatment Outcome ; Venous Thrombosis/etiology/physiopathology/*prevention & control/ultrasonography

OBJECTIVE: To determine the effect of ulinastatin on plasma thromboxane B(2) and deep vein thrombosis(DVT) in elderly patients after hip joint replacement. METHODS: Eighty ASAI-IIpatients aged 65-81 years undergoing hip joint replacement were randomly divided into 4 groups (n=20): Group U1 (ulinastatin 5 000 U/kg);Group U2 (ulinastatin 10 000 U/kg); Group U3 (ulinastatin 20 000 U/kg); and Group C (the same volume of saline as control).The blood samples were collected at 5 time points: preoperation (T(1)), immediately after the operation (T(2)), 1 d (T(3)), 2 d (T(4)) and 3 d after the operation (T(5)), respectively. Thromboxane B(2) was detected, and DVT was also examined through color Doppler ultrasonography 3 d after the operation. RESULTS: Compared with T(1), the level of thromboxane B(2) significantly increased in Group C at T(2)-5, in Group U1 at T(2-4), in Group U2 and U3 at T(2) (P<0.01). Compared with Group C, the concentration of thromboxane B(2) decreased in Group U1 at T(2-3), in Group U2 and U3 at T(2-4) (P<0.01). Compared with Group U1, thromboxane B(2) significantly decreased in Group U2 and U3 at T(2-4) (P<0.01).The incidence rate of DVT was 40% in Group C, 10% in Group U1. There was no incidence of DVT in the Group U2 and U3 (P>0.05). CONCLUSION Ulinastatin can inhibit blood thromboxane B(2) level in dose dependent manner and prevent DVT in elderly patients after hip joint replacement.
Aged ; Aged, 80 and over ; Arthroplasty, Replacement, Hip ; adverse effects ; Female ; Glycoproteins ; therapeutic use ; Hip Fractures ; surgery ; Humans ; Male ; Thromboxane B2 ; blood ; Trypsin Inhibitors ; therapeutic use ; Ultrasonography ; Venous Thrombosis ; diagnostic imaging ; etiology ; prevention & control

OBJECTIVESTo explore the diagnostic value of color Doppler flow imaging (CDFI) in monitoring portal vein complications (PVC) following orthotopic liver transplantation (OLT).

METHODSFive hundred and four patients received OLT and had CDFI examinations before and after their transplantations. CDFI monitoring parameters before the operation included portal vein diameter, blood flow velocity and the presence of thrombi within the portal vein. Monitoring parameters after the operation included portal vein diameters of donor and receiver sides, and the diameter of the mouth of anastomosis, inner side of blood vessel echo, the direction of blood flow and its speed.

RESULTSOf the 504 patients examined, the median velocity of the portal blood flow was 46.27 cm/s (range: 15.8 to 110.8) on the day of the operation. The blood flow speed of 358 cases (71.03%) was higher than 40 cm/s. Of the 358 patients, 347 (68.85%) had a blood flow speed lower than 40 cm/s one month after the operation. Sixty-four patients (12.70%) showed hepatofugal blood flow once, and only one case had a total hepatofugal blood flow. Thirteen patients (2.58%) had portal vein complications, including 4 cases with portal vein thrombosis and 9 with portal vein stenosis.

CONCLUSIONNot all abnormal portal vein blood flow signals will lead to complications. It is worthwhile to monitor the portal blood flows. CDFI plays an important role in the diagnosis of portal vein complications after orthotopic liver transplantation.

Adolescent ; Adult ; Aged ; Blood Flow Velocity ; physiology ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Liver Cirrhosis ; surgery ; Liver Neoplasms ; surgery ; Liver Transplantation ; adverse effects ; diagnostic imaging ; Male ; Middle Aged ; Portal Vein ; diagnostic imaging ; Ultrasonography, Doppler, Duplex ; methods ; Ultrasonography, Interventional ; Venous Thrombosis ; diagnostic imaging ; etiology