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Humphreys, Mitchell R.

https://orcid.org/0000-0003-3252-9518

Mayo Clinic

Mayo Clinic in Arizona

Citations 127

Obese patients undergoing cystectomy: A population‐based, propensity score matched analysis
Tyson, Mark D. , Humphreys, Mitchell R. , Castle, Erik P.

International Journal of Urology | November 21, 2013 | Volume: 21 | Issue: 5 | Pages: 491-495

10.1111/iju.12340 Get It

ObjectiveTo examine the impact of body mass index, as a measure of obesity, on the surgical outcomes of cystectomy.MethodsThe American College of Surgeons National Surgical Quality Improvement Program database was used to acquire data on 1293 cystectomies carried out from 2005 to 2011. Patients were divided into two groups: body mass index <30 kg/m2 and ≥30 kg/m2. A propensity score‐matched analysis of perioperative outcomes was carried out.ResultsA total of 869 patients had a body mass index <30, whereas 424 had a body mass index ≥30. Unadjusted comparisons showed higher rates of superficial surgical site infections (8.7% vs 5.3%, P = 0.04), renal insufficiency (4.0% vs 1.7%, P = 0.01) and increased operative times (365.7 min vs 338.6 min, P = 0.0004) in the obese patients, but interestingly lower rates of pneumonia (2.4% vs 4.8, P = 0.03) and cerebral vascular accidents (0.0% vs 0.9%, P = 0.05). However, the latter two observations might be explained by more tobacco use among non‐obese patients (26.6 mean pack‐years vs 20.0 mean pack‐years, P = 0.004). Notably, no differences in 30‐day mortality were noted. After adjusting for preoperative demographic and clinical data using propensity score‐matching methods, there were no observed differences between the two cohorts except for operative time (P = 0.04).ConclusionsObesity is not independently associated with an increased risk of perioperative complications or 30‐day mortality after cystectomy.
Postoperative Complications After Percutaneous Nephrolithotomy: A Contemporary Analysis by Insurance Status in the United States
Tyson, Mark D. , Humphreys, Mitchell R.

Journal of Endourology | October 22, 2013 | Volume: 28 | Issue: 3 | Pages: 291-297

10.1089/end.2013.0624 Get It

Simultaneous Kidney Transplantation and Bilateral Native Nephrectomy for Polycystic Kidney Disease
Tyson, Mark D. , Wisenbaugh, Eric S., Andrews, Paul E. , Castle, Erik P., Humphreys, Mitchell R. , Schwartz, Joseph E. , Knechtle, Stuart J.

Journal of Urology | May 30, 2013 | Volume: 190 | Issue: 6 | Pages: 2170-2174

10.1016/j.juro.2013.05.057 Get It

A Multicenter Comparison of the Safety and Effectiveness of Ureteroscopic Laser Lithotripsy in Obese and Normal Weight Patients
Zavaglia, Bogard, Paterson, Ryan F. , Teichman, Joel M.H., Lange, Dirk , Zappavigna, Christopher, Matlaga, Brian R., Núñez-Nateras, Rafael , Bruhn, Aron, Altamar, Hernan O., Humphreys, Mitchell R. , Shah, Ojas , Miller, Nicole L. , Chew, Ben H. , Miller, Nicole L

Journal of Endourology | March 22, 2013 | Volume: 27 | Issue: 6 | Pages: 710-714

10.1089/end.2012.0605 Get It

Age‐stratified outcomes of holmium laser enucleation of the prostate
Mmeje, Chinedu, Núñez-Nateras, Rafael , Warner, Jonathan N. , Humphreys, Mitchell R.

BJU International | March 19, 2013 | Volume: 112 | Issue: 7 | Pages: 982-989

10.1111/bju.12063 Get It

Objective To present the first age‐stratified assessment of outcomes after holmium laser enucleation of the prostate ( HoLEP ) for the treatment of lower urinary tract symptoms resulting from prostate enlargement. Patients and Methods We retrospectively analysed and compared the morbidity, and the peri‐operative and functional outcomes of patients aged 50–59, 60–69, 70–79 and ≥80 years. Complications at 30 days were stratified using the C lavien system. Functional outcomes were assessed using the I nternational P rostate S ymptom S core ( IPSS ), maximum urinary flow rate ( Q max ), post‐void residual urine volume ( PVR ) and urinary continence. Results A total of 311 patients underwent HoLEP for obstructive voiding symptoms from A ugust 2007 to J une 2011, of whom 22 patients were aged 50–59 years, 91 were aged 60–69 years, 153 were aged 70–79 years, and 45 were aged ≥80 years. The overall morbidity rates were similar among the age groups (20, 24.4, 21.6 and 22.1% for groups 1, 2, 3 and 4, respectively), as were the incidence of significant complications ( C lavien grade ≥ III ), change in serum haemoglobin level, and length of hospital stay. Patients ≥80 years did have a longer catheterization time (3.4 days) than patients aged 50–59 years (1.68 days). By 1 year there were no significant differences in urinary continence, IPSS , Q max , or PVR among the age groups. Conclusions Overall morbidity, hospital stay, and 1‐year functional outcomes of HoLEP were similar among all age groups. This study shows that HoLEP is a safe and effective treatment for benign prostatic hyperplasia regardless of age.
Faculty Opinions recommendation of Surgical simulation: a urological perspective.
Humphreys, Mitchell R.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature | September 18, 2012 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.3410/f.1105282.561493 Get It

Faculty Opinions recommendation of Single-incision laparoscopic surgery: initial urological experience and comparison with natural-orifice transluminal endoscopic surgery.
Humphreys, Mitchell R.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature | September 18, 2012 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.3410/f.1116263.572098 Get It

Faculty Opinions recommendation of Novel concepts in androgen receptor blockade.
Humphreys, Mitchell R.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature | September 18, 2012 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.3410/f.1119851.575952 Get It

Faculty Opinions recommendation of Endosew: new device for laparoscopic running sutures.
Humphreys, Mitchell R.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature | September 18, 2012 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.3410/f.1122936.580992 Get It

Faculty Opinions recommendation of First prize: Novel uropathogen-resistant coatings inspired by marine mussels.
Humphreys, Mitchell R.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature | September 17, 2012 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.3410/f.1146992.604102 Get It