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    Peter F Crookes, MD

    TitleProfessor of Surgery
    SchoolKeck School of Medicine of USC
    DepartmentSurgery
    AddressHCC 514
    Health Sciences Campus
    Los Angeles California 90089-9202
    Phone+1 323 442 6236
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      Other Positions
      TitleChief of Surgical Education

      TitleClerkship Program Director


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      Peter F Crookes MD is Professor of Surgery at the Keck School of Medicine of the University of Southern California. He is a native of Belfast, Northern Ireland, and obtained his medical degree and surgical training there, and then traveled to Melbourne, Australia, and subsequently to Los Angeles, California, where he was recruited to USC in 1990. He is an upper GI and Bariatric surgeon and was for several years the director of the bariatric program. In addition, he has a special interest in medical and surgical education and is the recipient of numerous awards from the department and the Keck School of Medicine for his contributions in that area. He is the director of the Student Clerkship for the Keck School of Medicine. His research interests include a wide variety of problems related to morbid obesity and the effect of bariatric surgical procedures on numerous disease processes, as well as studies in the pathophysiology of diseases of the esophagus and stomach. He has published extensively on the metabolic changes associated with different types of bariatric surgery, as well as the physiology of GERD and achalasia. He teaches medical ethics to medical students and surgical residents. He also has a lively interest in medical and surgical history and lectures and writes on historical topics of relevance to medicine and surgery.


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      Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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      1. Schwameis K, Zehetner J, Rona K, Crookes P, Bildzukewicz N, Oh DS, Ro G, Ross K, Sandhu K, Katkhouda N, Hagen JA, Lipham JC. Post-Nissen Dysphagia and Bloating Syndrome: Outcomes After Conversion to Toupet Fundoplication. J Gastrointest Surg. 2016 Nov 10. PMID: 27834011.
        View in: PubMed
      2. Rawlings AL, Shadduck PP, Sillin LF, Crookes P, MacFadyen BV, McDonald MP, Forde KA, Mellinger JD. Professionalism of surgery. Surg Endosc. 2015 Aug; 29(8):2072-6. PMID: 26139484.
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      3. Strong VE, Forde KA, MacFadyen BV, Mellinger JD, Crookes P, Sillin LF, Shadduck PP. Ethical considerations regarding the implementation of new technologies and techniques in surgery. Surg Endosc. 2014 Aug; 28(8):2272-6. PMID: 24962863.
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      4. Sullivan ME, Trial J, Baker C, Inaba K, Etcheverry J, Nally M, Crookes P. A framework for professionalism in surgery: what is important to medical students? Am J Surg. 2014 Feb; 207(2):255-9. PMID: 24239531.
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      5. Banki F, Flanagan P, Zehetner J, Armstrong A, Hagen JA, Joshi A, Sinha R, Oh D, Oezcelik A, DeMeester SR, Abate E, Lipham JC, Chandrasoma P, Crookes P, DeMeester TR. Progressive mucosal injury in patients with gastroesophageal reflux disease and increasing peripheral blood eosinophil counts. Arch Surg. 2010 Apr; 145(4):363-6. PMID: 20404287.
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      6. Frank P, Crookes P. Short- and long-term surgical follow-up of the postbariatric surgery patient. Gastroenterol Clin North Am. 2010 Mar; 39(1):135-46. PMID: 20202586.
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      7. Ayazi S, Crookes P. High-resolution esophageal manometry: using technical advances for clinical advantages. J Gastrointest Surg. 2010 Feb; 14 Suppl 1:S24-32. PMID: 19763703.
        View in: PubMed
      8. Ayazi S, Hagen JA, Chan LS, DeMeester SR, Lin MW, Ayazi A, Leers JM, Oezcelik A, Banki F, Lipham JC, DeMeester TR, Crookes P. Obesity and gastroesophageal reflux: quantifying the association between body mass index, esophageal acid exposure, and lower esophageal sphincter status in a large series of patients with reflux symptoms. J Gastrointest Surg. 2009 Aug; 13(8):1440-7. PMID: 19475461.
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      9. Khoueir P, Black MH, Crookes P, Kaufman HS, Katkhouda N, Wang MY. Prospective assessment of axial back pain symptoms before and after bariatric weight reduction surgery. Spine J. 2009 Jun; 9(6):454-63. PMID: 19356988.
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      10. Wasserberg N, Petrone P, Haney M, Crookes P, Kaufman HS. Effect of surgically induced weight loss on pelvic floor disorders in morbidly obese women. Ann Surg. 2009 Jan; 249(1):72-6. PMID: 19106678.
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      11. Ayazi S, Leers JM, Oezcelik A, Abate E, Peyre CG, Hagen JA, DeMeester SR, Banki F, Lipham JC, DeMeester TR, Crookes P. Measurement of gastric pH in ambulatory esophageal pH monitoring. Surg Endosc. 2009 Sep; 23(9):1968-73. PMID: 19067071.
        View in: PubMed
      12. Wasserberg N, Hamoui N, Petrone P, Crookes P, Kaufman HS. Bowel habits after gastric bypass versus the duodenal switch operation. Obes Surg. 2008 Dec; 18(12):1563-6. PMID: 18752029.
        View in: PubMed
      13. Wasserberg N, Haney M, Petrone P, Crookes P, Rosca J, Ritter M, Kaufman HS. Fecal incontinence among morbid obese women seeking for weight loss surgery: an underappreciated association with adverse impact on quality of life. Int J Colorectal Dis. 2008 May; 23(5):493-7. PMID: 18228028.
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      14. Hamoui N, Anthone GJ, Kaufman HS, Crookes P. Maintenance of weight loss in patients with body mass index >60 kg/m2: importance of length of small bowel bypassed. Surg Obes Relat Dis. 2008 May-Jun; 4(3):404-6; discussion 406-7. PMID: 18065296.
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      15. Hamoui N, Crookes P, Kaufman HS. Percutaneous gastric drainage as a treatment for small bowel obstruction after gastric bypass. Obes Surg. 2007 Oct; 17(10):1411-2. PMID: 18098404.
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      16. Hamoui N, Chock B, Anthone GJ, Crookes P. Revision of the duodenal switch: indications, technique, and outcomes. J Am Coll Surg. 2007 Apr; 204(4):603-8. PMID: 17382219.
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      17. McConville SR, Crookes P. The history of gastric surgery: the contribution of the Belfast School. Ulster Med J. 2007 Jan; 76(1):31-6. PMID: 17288303.
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      18. Hamoui N, Anthone G, Crookes P. The value of pulmonary function testing prior to bariatric surgery. Obes Surg. 2006 Dec; 16(12):1570-3. PMID: 17217631.
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      19. Hamoui N, Anthone GJ, Kaufman HS, Crookes P. Sleeve gastrectomy in the high-risk patient. Obes Surg. 2006 Nov; 16(11):1445-9. PMID: 17132409.
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      20. Hamoui N, Lord RV, Hagen JA, Theisen J, Demeester TR, Crookes P. Response of the lower esophageal sphincter to gastric distention by carbonated beverages. J Gastrointest Surg. 2006 Jun; 10(6):870-7. PMID: 16769544.
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      21. Hamoui N, Kantor S, Vince K, Crookes P. Long-term outcome of total knee replacement: does obesity matter? Obes Surg. 2006 Jan; 16(1):35-8. PMID: 16417755.
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      22. Crookes P. Surgical treatment of morbid obesity. Annu Rev Med. 2006; 57:243-64. PMID: 16409148.
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      23. Neville AL, Crookes P, Velmahos GC, Vlahos A, Theodorou D, Lucas CE. Esophageal dysfunction in cervical spinal cord injury: a potentially important mechanism of aspiration. J Trauma. 2005 Oct; 59(4):905-11. PMID: 16374280.
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      24. Raphael DT, Crookes P, Arnaudov D, Benbassat M. Acoustic reflectometry esophageal profiles minimally affected by massive gas ventilation. Am J Emerg Med. 2005 Oct; 23(6):747-53. PMID: 16182982.
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      25. Crookes P. Readers' responses to the webcast video editorial entitled "Willie Sutton and screening for alcohol in the emergency department and trauma center". MedGenMed. 2005; 7(1):35. PMID: 16369340.
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      26. Hamoui N, Lake J, Beart RW, Anthone GJ, Crookes P. Patterns of Internet use: bariatric versus colorectal patients in a private institution. J Am Coll Surg. 2004 Aug; 199(2):223-8. PMID: 15275877.
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      27. Almogy G, Crookes P, Anthone GJ. Longitudinal gastrectomy as a treatment for the high-risk super-obese patient. Obes Surg. 2004 Apr; 14(4):492-7. PMID: 15130224.
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      28. Hamoui N, Kingsbury S, Anthone GJ, Crookes P. Surgical treatment of morbid obesity in schizophrenic patients. Obes Surg. 2004 Mar; 14(3):349-52. PMID: 15072656.
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      29. Arain MA, Peters JH, Tamhankar AP, Portale G, Almogy G, DeMeester SR, Crookes P, Hagen JA, Bremner CG, DeMeester TR. Preoperative lower esophageal sphincter pressure affects outcome of laparoscopic esophageal myotomy for achalasia. J Gastrointest Surg. 2004 Mar-Apr; 8(3):328-34. PMID: 15019930.
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      30. Hamoui N, Anthone G, Crookes P. Calcium metabolism in the morbidly obese. Obes Surg. 2004 Jan; 14(1):9-12. PMID: 14980026.
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      31. Almogy G, Anthone GJ, Crookes P. Achalasia in the context of morbid obesity: a rare but important association. Obes Surg. 2003 Dec; 13(6):896-900. PMID: 14738678.
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      32. Tamhankar AP, Almogy G, Arain MA, Portale G, Hagen JA, Peters JH, Crookes P, Sillin LF, DeMeester SR, Bremner CG, DeMeester TR. Surgical management of hypertensive lower esophageal sphincter with dysphagia or chest pain. J Gastrointest Surg. 2003 Dec; 7(8):990-6; discussion 996. PMID: 14675708.
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      33. Hamoui N, Docherty SD, Crookes P. Gastrointestinal hemorrhage: is the surgeon obsolete? Emerg Med Clin North Am. 2003 Nov; 21(4):1017-56. PMID: 14708817.
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      34. Anthone GJ, Lord RV, DeMeester TR, Crookes P. The duodenal switch operation for the treatment of morbid obesity. Ann Surg. 2003 Oct; 238(4):618-27; discussion 627-8. PMID: 14530733.
        View in: PubMed
      35. Hamoui N, Kim K, Anthone G, Crookes P. The significance of elevated levels of parathyroid hormone in patients with morbid obesity before and after bariatric surgery. Arch Surg. 2003 Aug; 138(8):891-7. PMID: 12912749.
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      36. Gockel I, Lord RV, Bremner CG, Crookes P, Hamrah P, DeMeester TR. The hypertensive lower esophageal sphincter: a motility disorder with manometric features of outflow obstruction. J Gastrointest Surg. 2003 Jul-Aug; 7(5):692-700. PMID: 12850684.
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      37. Campos GM, Oberg S, Gastal O, Theisen J, Nigro JJ, Hagen JA, Costantini M, Bremner CG, DeMeester TR, Crookes P. Manometry of the lower esophageal sphincter: inter- and intraindividual variability of slow motorized pull-through versus station pull-through manometry. Dig Dis Sci. 2003 Jun; 48(6):1057-61. PMID: 12822862.
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      38. Bostanjian D, Anthone GJ, Hamoui N, Crookes P. Rhabdomyolysis of gluteal muscles leading to renal failure: a potentially fatal complication of surgery in the morbidly obese. Obes Surg. 2003 Apr; 13(2):302-5. PMID: 12740144.
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      39. Streets CG, DeMeester SR, DeMeester TR, Peters JH, Hagen JA, Crookes P, Bremner CG. Excellent quality of life after Nissen fundoplication depends on successful elimination of reflux symptoms and not the invasiveness of the surgical approach. Ann Thorac Surg. 2002 Oct; 74(4):1019-24; discussion 1024-5. PMID: 12400739.
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      40. Banki F, Mason RJ, DeMeester SR, Hagen JA, Balaji NS, Crookes P, Bremner CG, Peters JH, DeMeester TR. Vagal-sparing esophagectomy: a more physiologic alternative. Ann Surg. 2002 Sep; 236(3):324-35; discussion 335-6. PMID: 12192319.
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      41. Crookes P. Gastric cancer. Clin Obstet Gynecol. 2002 Sep; 45(3):892-903. PMID: 12370631.
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      42. Balaji NS, Crookes P, Banki F, Hagen JA, Ardill JE, DeMeester TR. A safe and noninvasive test for vagal integrity revisited. Arch Surg. 2002 Aug; 137(8):954-8; discussion 958-9. PMID: 12146997.
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      43. Nehra D, Lord RV, DeMeester TR, Theisen J, Peters JH, Crookes P, Bremner CG. Physiologic basis for the treatment of epiphrenic diverticulum. Ann Surg. 2002 Mar; 235(3):346-54. PMID: 11882756.
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      44. Lord RV, Kaminski A, Oberg S, Bowrey DJ, Hagen JA, DeMeester SR, Sillin LF, Peters JH, Crookes P, DeMeester TR. Absence of gastroesophageal reflux disease in a majority of patients taking acid suppression medications after Nissen fundoplication. J Gastrointest Surg. 2002 Jan-Feb; 6(1):3-9; discussion 10. PMID: 11986011.
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      45. Blom D, Peters JH, DeMeester TR, Crookes P, Hagan JA, DeMeester SR, Bremner C. Physiologic mechanism and preoperative prediction of new-onset dysphagia after laparoscopic Nissen fundoplication. J Gastrointest Surg. 2002 Jan-Feb; 6(1):22-7; discussion 27-8. PMID: 11986014.
        View in: PubMed
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