title: Retrievable inferior vena cava filters may be safely applied in gastric bypass surgery.
abstract: BACKGROUND
  Pulmonary embolus (PE) is a potentially devastating and fatal postoperative complication in morbidly obese patients. This study was undertaken to review the safety and efficacy of retrievable prophylactic inferior vena cava (IVC) filters in high-risk morbidly obese patients undergoing gastric bypass.
  
  
  METHODS
  Patients who underwent gastric bypass surgery and preoperative insertion of retrievable IVC filters had their records reviewed. Indications for IVC filter insertion were: history of deep venous thrombosis (DVT) or PE, long-standing sleep apnea, venous stasis disease, and/or weight > 400 pounds.
  
  
  RESULTS
  24 patients underwent IVC filter placement before gastric bypass surgery. There were 10 women and 14 men with an average age of 50 +/- 6.3 years (range 39 to 59) and average body mass index (BMI) of 57 +/- 7.5 kg/m(2) (range 49 to 74). BMI greater then 50 kg/m(2) was present in 21 of 24 patients (88%). All patients had successful IVC filter placement. IVC filter retrieval postoperatively was performed in 20 of 24 patients (83%) with three left for clinical reasons and one (4%) left due to technical inability to retrieve. There was one complication directly attributable to IVC filter retrieval. There were no deaths. Five patients (21%) developed DVT or PE postoperatively. Follow-up was 16 +/- 7.6 months (range 8 to 33).
  
  
  CONCLUSIONS
  Prophylactic IVC filter placement and retrieval can be safely undertaken in high-risk gastric bypass patients. We recommend preoperative IVC filter placement in selected patients.
authors: Department of Surgery, Stanford University School of Medicine, Sanford, CA 94305, USA.
authors: Rob
authors: R
authors: Schuster
authors: Judith C
authors: JC
authors: Hagedorn
authors: Myriam J
authors: MJ
authors: Curet
authors: John M
authors: JM
authors: Morton
mesh_terms: D000328:Adult; D020878:Device Removal / Q000009:adverse effects; D005260:Female; D005500:Follow-Up Studies; D015390:Gastric Bypass / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D011300:Preoperative Care; D011655:Pulmonary Embolism / Q000209:etiology; D012307:Risk Factors; D016306:Vena Cava Filters / Q000009:adverse effects*; D014682:Vena Cava, Inferior; D020246:Venous Thrombosis / Q000209:etiology