Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Andrew A. Wheeler is active.

Publication


Featured researches published by Andrew A. Wheeler.


Surgery for Obesity and Related Diseases | 2010

Laparoscopic revisional surgery after Roux-en-Y gastric bypass and sleeve gastrectomy

Mario Morales; Andrew A. Wheeler; Archana Ramaswamy; J. Stephen Scott; Roger de la Torre

BACKGROUND Failure of primary bariatric surgery is frequently due to weight recidivism, intractable gastric reflux, gastrojejunal strictures, fistulas, and malnutrition. Of these patients, 10-60% will undergo reoperative bariatric surgery, depending on the primary procedure performed. Open reoperative approaches for revision to Roux-en-Y gastric bypass (RYGB) have traditionally been advocated secondary to the perceived difficulty and safety with laparoscopic techniques. Few studies have addressed revisions after RYGB. The aim of the present study was to provide our experience regarding the safety, efficacy, and weight loss results of laparoscopic revisional surgery after previous RYGB and sleeve gastrectomy procedures. METHODS A retrospective analysis of patients who underwent laparoscopic revisional bariatric surgery for complications after previous RYGB and sleeve gastrectomy from November 2005 to May 2007 was performed. Technical revisions included isolation and transection of gastrogastric fistulas with partial gastrectomy, sleeve gastrectomy conversion to RYGB, and revision of RYGB. The data collected included the pre- and postoperative body mass index, operative time, blood loss, length of hospital stay, and intraoperative and postoperative complications. RESULTS A total of 26 patients underwent laparoscopic revisional surgery. The primary operations had consisted of RYGB and sleeve gastrectomy. The complications from primary operations included gastrogastric fistulas, refractory gastroesophageal reflux disease, weight recidivism, and gastric outlet obstruction. The mean prerevision body mass index was 42 ± 10 kg/m(2). The average follow-up was 240 days (range 11-476). The average body mass index during follow-up was 37 ± 8 kg/m(2). Laparoscopic revision was successful in all but 1 patient, who required conversion to laparotomy for staple line leak. The average operating room time and estimated blood loss was 131 ± 66 minutes and 70 mL, respectively. The average hospital stay was 6 days. Three patients required surgical exploration for hemorrhage, staple line leak, and an incarcerated hernia. The overall complication rate was 23%, with a major complication rate of 11.5%. No patients died. CONCLUSION Laparoscopic revisional bariatric surgery after previous RYGB and sleeve gastrectomy is technically challenging but compared well in safety and efficacy with the results from open revisional procedures. Intraoperative endoscopy is a key component in performing these procedures.


Journal of Laparoendoscopic & Advanced Surgical Techniques | 2011

Laparoscopic Repair of Perforated Marginal Ulcer Following Roux-en-Y Gastric Bypass: A Case Series

Andrew A. Wheeler; Roger de la Torre; Nicole Fearing

INTRODUCTION Marginal ulcer perforation is a known complication of Roux-en-Y gastric bypass (RYGB), and laparoscopic repair may be a feasible option minimizing the morbidity associated with a large laparotomy incision. We present our experience with laparoscopic repair of perforated marginal ulcers in patients who have previously undergone RYGB. METHODS A retrospective chart review from August 2005 to April 2007 was performed identifying all patients who underwent laparoscopic repair of perforated marginal ulcer after RYGB at one hospital. The perforation was repaired either by laparoscopic primary suture closure followed by application of an omental patch or by laparoscopic Graham patch without primary suture repair. Operative time, duration of hospitalization, postoperative follow-up, and postoperative complications were recorded. Data are presented as mean ± standard deviation. RESULTS Six patients underwent laparoscopic repair of a perforated marginal ulcer. Operative time was 101.8 ± 50 minutes with a mean hospitalization of 5.3 ± 2.7 days. Follow-up was 6.2 ± 7.5 months. Postoperative complications included 2 patients with nausea and vomiting related to an exposed suture at the gastrojejunostomy, 1 patient with chronic gastritis, and 1 patient developed a stricture at the gastrojejunostomy. CONCLUSIONS We present the largest series to date of laparoscopic repair of perforated marginal ulcers utilizing an omental patch for repair. We demonstrate that a laparoscopic repair can be completed in a reasonable operative time, with minimal postoperative hospitalization, and low associated morbidity. Patients who develop a perforated marginal ulcer after RYGB can be safely and effectively treated with laparoscopic repair with an omental patch.


American Journal of Otolaryngology | 2014

Repeat PEG placement is safe for head and neck cancer patients

Michael B. Nicholl; Daniel A. Lyons; Andrew A. Wheeler; Jeffery B. Jorgensen

PURPOSE Percutaneous endoscopic gastrostomy (PEG) provides durable nutritional access for head and neck (HNC) patients as they undergo treatment. Continuing treatment of HNC may necessitate repeat PEG placement. We report our outcomes with repeat PEG compared to first-time PEG in HNC patients. MATERIALS AND METHODS A retrospective chart review identified morbidity, mortality, and possible risk factors for complications. RESULTS Repeat PEG tubes constituted 17% of PEG procedures. Morbidity was rare and similar complication rates were found between the initial PEG and repeat PEG groups (2% vs. 11%, p=0.131). There were no mortalities. CONCLUSIONS Repeat PEG plays an important role in the care of HNC patients and can be considered a safe means to establish durable enteric feeding access for patients with recurrent cancer or treatment complications.


Surgery | 2007

Hemostasis and hemostatic agents in minimally invasive surgery

Roger de la Torre; Sharon L. Bachman; Andrew A. Wheeler; Kevin N. Bartow; J. Stephen Scott


Surgery for Obesity and Related Diseases | 2008

P106: Laparoscopic sleeve gastrectomy in the super morbidly obese is effective treatment for diabetes mellitus and obstructive sleep apnea

Andrew A. Wheeler; Mario Morales; Nicole Fearing; James S. Scott; Roger de la Torre; Archana Ramaswamy


World Journal of Oncology | 2014

Age Influences Likelihood of Pancreatic Cancer Treatment, but not Outcome

Andrew A. Wheeler; Michael B. Nicholl


Journal of The American College of Surgeons | 2011

Differential gene and microRNA expression in breast cancer is associated with hormone receptor status

Andrew A. Wheeler; J. Wade Davis; Charles W. Caldwell


Surgery for Obesity and Related Diseases | 2008

V14: Laparoscopic Roux-en-Y gastric bypass revision for gastrogastric fistula following previous open Roux-en-Y bypass

Mario Morales; Andrew A. Wheeler; Roger de la Torre; James S. Scott


Surgery for Obesity and Related Diseases | 2008

ST-08: Revisional laparoscopic Roux-en-Y gastric bypass following non-gastric banding bariatric procedures

Mario Morales; Andrew A. Wheeler; Roger de la Torre; James S. Scott


Surgery for Obesity and Related Diseases | 2007

P111: Evaluation of treatment regimens for controlling hyperglycemia in postoperative bariatric surgery patients

Andrew A. Wheeler; Suzanne Mitschele; Sharon L. Bachman; Richard K. Johnson; Richard W. Madsen; Roger de la Torre; James S. Scott

Collaboration


Dive into the Andrew A. Wheeler's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge