Lygia Stewart

Summary

Country: USA

Publications

  1. doi request reprint The association between body mass index and severe biliary infections: a multivariate analysis
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA 94121, USA
    Am J Surg 204:574-9. 2012
  2. ncbi request reprint Elderly patients have more severe biliary infections: influence of complement-killing and induction of TNFalpha production
    Lygia Stewart
    Department of Surgery, University of California, San Francisco, CA 94121, USA
    Surgery 143:103-12. 2008
  3. ncbi request reprint Bacteria entombed in the center of cholesterol gallstones induce fewer infectious manifestations than bacteria in the matrix of pigment stones
    Lygia Stewart
    Department of Surgery, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 11:1298-308. 2007
  4. ncbi request reprint Gallstones containing bacteria are biofilms: bacterial slime production and ability to form pigment solids determines infection severity and bacteremia
    Lygia Stewart
    Department of Surgery 112, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 11:977-83; discussion 983-4. 2007
  5. ncbi request reprint Biliary bacterial factors determine the path of gallstone formation
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA 94121, USA
    Am J Surg 192:598-603. 2006
  6. ncbi request reprint Right hepatic artery injury associated with laparoscopic bile duct injury: incidence, mechanism, and consequences
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, California 94121, USA
    J Gastrointest Surg 8:523-30; discussion 530-1. 2004
  7. ncbi request reprint Cholangitis: bacterial virulence factors that facilitate cholangiovenous reflux and tumor necrosis factor-alpha production
    Lygia Stewart
    Department of Surgery 112, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 7:191-8; discussion 198-9. 2003
  8. ncbi request reprint Pathogenesis of pigment gallstones in Western societies: the central role of bacteria
    Lygia Stewart
    Department of Surgery, San Francisco State University, San Francisco, CA, USA
    J Gastrointest Surg 6:891-903; discussion 903-4. 2002
  9. pmc Laparoscopic treatment of liver tumours using a two-needle probe bipolar radiofrequency ablation device
    Farzad Alemi
    Department of Surgery, University of California, and San Francisco VA Medical Center, San Francisco, CA 94121, USA
    HPB (Oxford) 13:656-64. 2011
  10. ncbi request reprint Spectrum of gallstone disease in the veterans population
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA, USA
    Am J Surg 190:746-51. 2005

Collaborators

Detail Information

Publications20

  1. doi request reprint The association between body mass index and severe biliary infections: a multivariate analysis
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA 94121, USA
    Am J Surg 204:574-9. 2012
    ..It is a risk factor for cholesterol gallstones, but little is known about associations between body mass index (BMI) and biliary infections. We studied this using factors associated with biliary infections...
  2. ncbi request reprint Elderly patients have more severe biliary infections: influence of complement-killing and induction of TNFalpha production
    Lygia Stewart
    Department of Surgery, University of California, San Francisco, CA 94121, USA
    Surgery 143:103-12. 2008
    ..We noted previously that bacterial serum-sensitivity and induction of TNFalpha production in sera (iTNFsera) were associated with severe biliary infections. We examined the influence of age and these factors on illness severity...
  3. ncbi request reprint Bacteria entombed in the center of cholesterol gallstones induce fewer infectious manifestations than bacteria in the matrix of pigment stones
    Lygia Stewart
    Department of Surgery, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 11:1298-308. 2007
    ..The clinical significance of bacteria in the pigment centers of cholesterol stones is unknown. We compared the infectious manifestations and characteristics of bacteria from pigment stones and predominantly cholesterol stones...
  4. ncbi request reprint Gallstones containing bacteria are biofilms: bacterial slime production and ability to form pigment solids determines infection severity and bacteremia
    Lygia Stewart
    Department of Surgery 112, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 11:977-83; discussion 983-4. 2007
    ..Slime production facilitates adherence, whereas beta-glucuronidase and phospholipase generate colonization surface. These factors facilitate gallstone formation, but their influence on infection severity is unknown...
  5. ncbi request reprint Biliary bacterial factors determine the path of gallstone formation
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA 94121, USA
    Am J Surg 192:598-603. 2006
    ..Bacterial factors that facilitate gallstone formation include beta-glucuronidase (bG), phospholipase (PhL), and slime. The current study sought to determine whether bacterial factors influence the path of gallstone formation...
  6. ncbi request reprint Right hepatic artery injury associated with laparoscopic bile duct injury: incidence, mechanism, and consequences
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, California 94121, USA
    J Gastrointest Surg 8:523-30; discussion 530-1. 2004
    ..A similar increase in the complication rate was not seen in patients treated by a biliary specialist...
  7. ncbi request reprint Cholangitis: bacterial virulence factors that facilitate cholangiovenous reflux and tumor necrosis factor-alpha production
    Lygia Stewart
    Department of Surgery 112, University of California San Francisco, 4150 Clement Street, San Francisco, CA 94121, USA
    J Gastrointest Surg 7:191-8; discussion 198-9. 2003
    ..The most virulent bacterial species (from patients with sepsis) were killed by complement, but they still had significant CVR and were associated with increased TNF-alpha production...
  8. ncbi request reprint Pathogenesis of pigment gallstones in Western societies: the central role of bacteria
    Lygia Stewart
    Department of Surgery, San Francisco State University, San Francisco, CA, USA
    J Gastrointest Surg 6:891-903; discussion 903-4. 2002
    ..Thus bacteria have a major role in Western pigment gallstone formation. Furthermore, gallstone color did not predict composition or bacterial presence...
  9. pmc Laparoscopic treatment of liver tumours using a two-needle probe bipolar radiofrequency ablation device
    Farzad Alemi
    Department of Surgery, University of California, and San Francisco VA Medical Center, San Francisco, CA 94121, USA
    HPB (Oxford) 13:656-64. 2011
    ..Additionally, B-RFA can precoagulate parenchyma to assist in hepatic resection. Herein, we report our early experience using B-RFA...
  10. ncbi request reprint Spectrum of gallstone disease in the veterans population
    Lygia Stewart
    Department of Surgery, University of California San Francisco, San Francisco, CA, USA
    Am J Surg 190:746-51. 2005
    ..Elderly male patients are thought to have a higher incidence of biliary infections. This demographic is common among veterans, so we analyzed the spectrum of gallstone disease in a large veteran population...
  11. doi request reprint Neuroendocrine tumors of the ampulla of Vater: biological behavior and surgical management
    Jonathan T Carter
    Department of Surgery, University of California, San Francisco, 4 Koret Way, LR 101, Box 0475, San Francisco, CA 94143 0475, USA
    Arch Surg 144:527-31. 2009
    ..To describe the biological behavior and surgical management of ampullary neuroendocrine tumors in 7 patients...
  12. ncbi request reprint Gram-negative bacteria killed by complement are associated with more severe biliary infections and produce more tumor necrosis factor-alpha in sera
    Lygia Stewart
    Department of Surgery, University of California San Francisco, USA
    Surgery 132:408-14. 2002
    ..We previously showed that gallstones contain bacteria and that illness severity correlates with bacterial presence. This study examined virulence differences of gram-negative biliary bacteria...
  13. pmc Causes and prevention of laparoscopic bile duct injuries: analysis of 252 cases from a human factors and cognitive psychology perspective
    Lawrence W Way
    Department of Surgery, University of California San Francisco, 513 Parnassus Avenue, S 550, San Francisco, CA 94143 0475, USA
    Ann Surg 237:460-9. 2003
    ..To apply human performance concepts in an attempt to understand the causes of and prevent laparoscopic bile duct injury...
  14. doi request reprint Operative reports: form and function
    Lygia Stewart
    Department of Surgery, University of California San Francisco, 4 Koret Way, San Francisco, CA 94143 0475, USA
    Arch Surg 145:865-71. 2010
    ....
  15. doi request reprint Hepatic surgery at a VA tertiary medical center: lessons learned
    Farzad Alemi
    Department of Surgery, University of California, San Francisco, USA
    Am J Surg 200:591-5. 2010
    ..The development of a hepatic surgery center within a US Department of Veterans Affairs hospital is dependent on proper training and institutional support, which can translate into low operative morbidity and mortality rates...
  16. doi request reprint Tumors of the ampulla of vater: histopathologic classification and predictors of survival
    Jonathan T Carter
    Department of Surgery, University of California, San Francisco, CA 94143 0475, USA
    J Am Coll Surg 207:210-8. 2008
    ..The histology and clinical behavior of ampullary tumors vary substantially. We speculated that this might reflect the presence of two kinds of ampullary adenocarcinoma: pancreaticobiliary and intestinal...
  17. doi request reprint Bringing the skills laboratory home: an affordable webcam-based personal trainer for developing laparoscopic skills
    Sow Alfred Kobayashi
    Department of Surgery, University of California, San Francisco, California 94143, USA
    J Surg Educ 68:105-9. 2011
    ..The purpose of this work was to develop a more flexible system of laparoscopic surgery training with demonstrated effectiveness and construct validity...
  18. ncbi request reprint Bipolar pulse coagulation for resection of the cirrhotic liver
    Carlos U Corvera
    Department of Surgery, University of California San Francisco, VA Medical Center, San Francisco, California 94121, USA
    J Surg Res 136:182-6. 2006
    ..The Gyrus hand piece (GHP) is a bipolar diathermy pulsation instrument that is similar in design to a large hemostat (Péan) clamp that divides tissue while the clamp remains closed...
  19. doi request reprint The efficacy of medical team training: improved team performance and decreased operating room delays: a detailed analysis of 4863 cases
    Francis A Wolf
    Department of Surgery, University of California, San Francisco, CA, USA
    Ann Surg 252:477-83; discussion 483-5. 2010
    ..Medical team training (MTT) has been touted as a way to improve teamwork and patient safety in the operating room (OR)...
  20. ncbi request reprint Local resection of ampullary tumors
    Adam T Meneghetti
    Department of Surgery, University of California San Francisco, San Francisco VA Medical Center, California 94121 0112, USA
    J Gastrointest Surg 9:1300-6. 2005
    ..No adenomas recurred as carcinomas, suggesting that local resection is appropriate for these tumors in the absence of dysplasia or atypia on preoperative biopsies...