Admission angiography for blunt splenic injury: advantages and pitfalls.

BACKGROUND: To analyze the use of admission angiography as a nonoperative adjunct for management of blunt splenic injury. METHODS: Retrospective chart review of all blunt splenic injuries to a Level I trauma center from March 1997 through July 1999. RESULTS: One hundred twenty-six patients underwent angiography for splenic injury. Eighty-six patients (68%) had a negative angiogram and were treated expectantly. Of these, seven patients (8%) required laparotomy, with a splenic salvage rate of 92%. Embolization was performed on 40 patients (32%) for evidence of vascular injury. Of these, three patients (8%) required laparotomy, for a total salvage of 92%. Repeat angiography was performed for suspicion of bleeding in 12 patients (10%), with 50% requiring embolization. Outcome based on CT grade demonstrated an average grade of 2.9, with a salvage rate of greater than 70% for grade IV and V injuries. CONCLUSION: Vascular injury increases with splenic injury grade. Embolization improves nonoperative salvage rates to 92%, even with high-grade injuries. Ten percent of patients require additional therapy including "second-look" angiography. A significant portion of patients with negative screening angiograms (10%) required either embolization or laparotomy to control delayed hemorrhage.

Pleurx tunneled catheter in the management of malignant ascites.

The authors report their experience with the Pleurx tunneled catheter in patients with end-stage abdominal carcinomatosis and intractable ascites. Ten patients with intractable ascites and abdominal carcinomatosis underwent placement of tunneled Pleurx catheters. The catheters were placed with combined US and fluoroscopic guidance. Patients' charts were reviewed for procedural complications, serum albumin levels, infection, efficacy of catheters in providing effective drainage of ascites, and duration of catheter patency. There were no procedural complications. The serum albumin level decreased from 2.7 g/L to 2.3 at 3 weeks and 2.4 g/L at 6 weeks. There were no catheter infections. Some patients required continuous drainage, whereas others were successfully treated by drainage once per week. Mean catheter survival was 70 days. In patients with end-stage abdominal carcinomatosis complicated by malignant ascites, the Pleurx tunneled catheter can provide effective palliation and alleviated the need for repeated percutaneous paracentesis.

A randomized, prospective evaluation of the Tesio, Ash split, and Opti-flow hemodialysis catheters.

PURPOSE: A randomized, prospective evaluation of three high-flow hemodialysis catheters. MATERIALS AND METHODS: Ninety-four patients were randomly assigned 113 Tesio, Ash split, and Opti-flow catheters from December 1998 through June 1999. Insertion times, procedural complications, and ease of insertion were recorded. Mean catheter flow rates were recorded at first dialysis, 30 days, and 90 days. Patency, catheter survival, and catheter-related infections were evaluated. RESULTS: Thirty-eight Ash split, 39 Opti-flow, and 36 Tesio catheters were placed. Tesio mean insertion time (41.5 min) was significantly longer than Ash split (29.4 min) or Opti-flow (29.6 min) (P =.004). There were four complications related to Tesio catheters (three cases of pericatheter bleeding, one air embolism), one related to an Opti-flow catheter (pericatheter bleeding), and zero related to Ash split catheters. Opti-flow and Ash split catheters were significantly easier to insert than Tesio catheters (P =.041). Mean flow rates were not significantly different among the catheters initially (P =.112), at 30 days (P =.281), or at 90 days (P =.112). Catheter-related infection rates per 100 catheter days were 0.12 for Ash split, 0.35 for Opti-flow, and 0.14 for TESIO: Median catheter survival was 302 days for Ash split, 176 days for Opti-flow, and 228 days for TESIO: CONCLUSIONS: Opti-Flow and Ash split catheters were faster and easier to place than Tesio catheters. There was no difference in hemodialysis flow rates or catheter survival.

CT findings after embolization for blunt splenic trauma.

PURPOSE: To determine complications after transcatheter embolization for blunt splenic injury as recognized with computed tomography (CT). MATERIALS AND METHODS: From March 1997 to January 2000, 80 patients underwent transcatheter embolization after blunt splenic injury, of whom 53 underwent abdominal CT examination before and after embolization. Preembolization CT scans were reviewed to determine grade of injury, and postembolization CT scans were reviewed to identify complications secondary to embolization. Arteriography results were reviewed to determine findings and method and location of embolization. RESULTS: Splenic infarcts occurred in 63% of patients after proximal embolization and in 100% of patients after distal embolization. Infarcts after distal embolization tend to be larger and occur just distal to the embolization material, whereas infarcts after proximal embolization tend to be smaller, multiple, and located in the periphery. Most infarcts resolved without sequelae. Seven patients developed gas within an infarct or subcapsular fluid collection. Two collections were drained and found to be sterile and one patient had a splenic abscess at laparotomy. CONCLUSIONS: Infarcts are common after splenic embolization. Gas may be present within an infarct after embolization with Gelfoam; however, the presence of air/fluid level is a better predictor of abscess.

Nonsurgical management of blunt splenic injury: use of CT criteria to select patients for splenic arteriography and potential endovascular therapy.

PURPOSE: To determine if contrast material-enhanced spiral computed tomography (CT) can be used to select patients with blunt splenic injuries to undergo arteriographic embolization. MATERIALS AND METHODS: During a 15-month period, 78 patients who were hemodynamically stable and required no immediate surgery underwent contrast-enhanced spiral CT followed by splenic arteriography. CT scans were assessed for splenic vascular contrast material extravasation or posttraumatic splenic vascular lesions. Medical records were reviewed for splenic arteriographic results and clinical outcome. RESULTS: There were 25 grade I, 12 grade II, 27 grade III, 12 grade IV, and two grade V splenic injuries. CT showed active contrast material extravasation in seven patients and splenic vascular lesions in 19 patients. At CT, splenic vascular contrast material extravasation was 100% (seven of seven patients) and a posttraumatic splenic vascular lesion was 83% (10 of 12 patients) sensitive on the basis of arteriographic or surgical outcome in predicting the need for transcatheter embolization or splenic surgery. Overall, CT had a sensitivity of 81% (17 of 21 patients), a specificity of 84% (48 of 57 patients), negative and positive predictive values of 92% (48 of 52 patients) and 65% (17 of 26 patients), respectively, and an accuracy of 83% (65 of 78 patients) in predicting the need for splenic injury treatment. CONCLUSION: Contrast-enhanced spiral CT plays a valuable role in selecting hemodynamically stable patients with splenic vascular injury who may be treated with transcatheter therapy and potentially improves the success rate of nonsurgical management.

Accuracy and safety of carbon dioxide inferior vena cavography.

PURPOSE: The purpose of this study was to assess the accuracy of carbon dioxide compared to iodinated contrast material for determining inferior vena cava (IVC) diameter prior to filter placement, and to assess the safety of CO2 when used for this purpose. PATIENTS AND METHODS: Consecutive patients undergoing inferior vena cavography prior to filter placement were prospectively evaluated with use of both CO2 and iodinated contrast material. The diameter of the IVC was measured and compared in the same four locations in each patient for both agents. The diameter was corrected for magnification and pin-cushion distortion. The ability of CO2 to correctly classify IVC diameter as < or =28 mm or >28 mm, based on the IVC diameter with iodinated contrast material, was determined. A consensus panel assessed renal vein visualization with CO2 and iodinated contrast material. Blood pressure and arterial oxygen saturation were measured immediately before and after CO2 injection. RESULTS: Among 30 patients, there was no significant difference in the measured diameter of the IVC with CO2 versus iodinated contrast material after correction for magnification and pin-cushion distortion. One of 30 patients (3.3%) in this study was misclassified as having an IVC < or =28 mm with CO2 when, in fact, the IVC diameter was >28 mm based on iodinated contrast material. This could be clinically significant for certain IVC filters. Forty-seven percent of renal veins identified on contrast venography were identified by CO2 vena cavography. There was no significant difference in the blood pressure or oxygen saturation values measured before and after CO2 injection. However, one patient with pulmonary artery hypertension did experience transient, symptomatic hypotension after CO2 injection. CONCLUSIONS: In most patients, CO2 vena cavography accurately evaluated IVC diameter prior to filter placement. In 3.3% of patients, the discrepancy in measurements between CO2 and iodinated contrast material could be clinically significant, depending on the type of filter placed. CO2 was less accurate than iodinated contrast material in identifying renal veins. Although CO2 vena cavography is safe in the majority of patients, it should be used with caution in patients with pulmonary hypertension.