David W. Larson

Dr. David W. Larson

orcid

Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 May 2006 in Annals of Surgery
Verified
Journal Article
Closed access
DLDavid W. Larson
David W. Larson
RCRobert R. Cima
Robert R. Cima
EDEric J. Dozois
Eric J. Dozois
MDMichael Davies
Michael Davies
KPKaren Piotrowicz
Karen Piotrowicz
JPJohn Pemberton
John Pemberton
To compare safety and short-term outcomes of 100 laparoscopic ileal pouch-anal anastomosis (IPAA) versus 200 conventional open IPAA patients. Outcomes of laparoscopic IPAA (LAP-IPAA) have been incompletely characterized. Previous reports are characterized by small numbers of patients and rarely include case-matched or randomized trial methodology. This report describes 100 LAP-IPAA patients case matched to 200 open IPAA patients. Between 1998 and 2004, 100 consecutive LAP-IPAA patients (75 laparoscopic assisted, 25 hand assisted) were identified and case matched to 200 open IPAA control patients by age, operation, gender, date of operation, and body mass index. Operative and postoperative outcomes at 90 days were compared. A total of 300 patients (180 female) with a median age of 32 years (range, 17–66 years), and a median body mass index of 23 kg/m2 (range, 16–34 kg/m2) underwent IPAA (100 LAP-IPAA, 200 open IPAA). Diagnosis (chronic ulcerative colitis 97%, familial adenomatous polyposis 3%) and previous operative history were equivalent between groups. One intraoperative complication occurred in each group. Overall, the laparoscopic conversion rate was 6%. Median operative time was longer for the LAP-IPAA group (333 minutes versus 230 minutes, P < 0.0001). LAP-IPAA patients had shorter median time to regular diet (3 versus 5 days), time to ileostomy output (2 versus 3 days), length of stay (4 versus 7 days), and decreased IV narcotic use (all P < 0.05.Postoperative morbidity was equivalent (LAP-IPAA = 33%, open IPAA = 37%), mortality was nil, and readmission rates were equal (LAP-IPAA = 21%, open IPAA = 22%). Reoperation was required in 3% of LAP-IPAA and 6.5% of open IPAA patients (P < 0.2) during the first 3 months. LAP-IPAA is equivalent to open IPAA in terms of safety and feasibility. In addition, LAP-IPAA provides significant improvements in short-term recovery outcomes.

16 May 2014 in BMC Cancer
Verified
Journal Article
Open access
PDF file
VTV. Liana Tsikitis
V. Liana Tsikitis
DLDavid W. Larson
David W. Larson
Marianne HuebnerMarianne Huebner
Marianne Huebner
CLChristine M Lohse
Christine M Lohse
PTPatricia A Thompson
Patricia A Thompson
The aim of this study was to evaluate clinico-pathologic specific predictors of recurrence for stage II/III disease. Improving recurrence prediction for resected stage II/III colon cancer patients could alter surveillance strategies, providing opportunities for more informed use of chemotherapy for high risk individuals.

15 May 2014 in British Journal of Surgery
Verified
Journal Article
Closed access
PDF file
DLDavid W. Larson
David W. Larson
JLJ. K. Lovely
J. K. Lovely
RCR. R. Cima
R. R. Cima
EDE. J. Dozois
E. J. Dozois
HCH. Chua
H. Chua
Marianne HuebnerMarianne Huebner
Marianne Huebner

1 April 2008 in Diseases of the Colon & Rectum
Verified
Journal Article
Closed access
DLDavid W. Larson
David W. Larson
MDMichael M. Davies
Michael M. Davies
EDEric J. Dozois
Eric J. Dozois
RCRobert R. Cima
Robert R. Cima
KPKaren Piotrowicz
Karen Piotrowicz
JPJohn H. Pemberton
John H. Pemberton
This study was designed to compare self-reported sexual function, body image, and quality of life outcomes among ulcerative colitis patients undergoing laparoscopic or open ileal pouch-anal anastomosis. Between 1978 and 2004, 100 laparoscopic and 189 open operations were performed in patients who were identified from a previously published cohort. Patients were surveyed one year after operation to evaluate sexual function, body image, and quality of life. A total of 125 of 289 patients (43 percent) returned completed surveys. There were no significant differences in terms of demographics, complications, or long-term functional outcomes between those who completed the surveys and those who did not. There were no clinical differences in results between laparoscopic and open patients using the three survey instruments. Orgasmic function scores were lower in men who underwent laparoscopic ileal pouch-anal anastomosis (P< 0.05) compared with open ileal pouch-anal anastomosis. Overall, sexual function scores were equal to or better than normal values for men but were lower in women. Finally, overall body image and quality of life scores were above the means published for the United States. After ileal pouch-anal anastomosis, men and women reported excellent body image and high cosmetic and quality of life scores regardless of operative approach. Female sexual function was more adversely affected after ileal pouch-anal anastomosis than was male sexual function.

14 February 2020 in Annals of Surgery
Verified
Journal Article
Closed access
JCJacopo Crippa
Jacopo Crippa
FGFabian Grass
Fabian Grass
EDEric J. Dozois
Eric J. Dozois
KMKellie L. Mathis
Kellie L. Mathis
AMAmit Merchea
Amit Merchea
DLDavid W. Larson
David W. Larson
Objective: To compare short term outcomes of patients undergoing laparoscopic or robotic rectal cancer surgery. Background: Significant benefits of robotic rectal cancer surgery over laparoscopy have yet to be demonstrated. Operative time and direct institutional cost seem in favor of the laparoscopic approach. Methods: We performed a retrospective review of consecutive patients operated on for rectal cancer with a mini-invasive approach at Mayo Clinic from 2005 to 2018. The primary aim of this study was to investigate the difference in postoperative morbidity between the laparoscopic and robotic approach. Multivariable models for odds to complications and prolonged (≥6 days) length of stay were built. Results: A total of 600 patients were included in the analysis. The number of patients undergoing robotic surgery was 317 (52.8%). The 2 groups were similar in respect to age, sex, and body mass index. Laparoscopic surgery was correlated to shorter operative time (214 vs 324 minutes; P < 0.001). Patients undergoing robotic surgery had a lower overall complications rate (37.2% vs 51.2%; P < 0.001). Robotic surgery was found to be the most protective factor [odds ratio (OR) 0.485; P = 0.006] for odds to complications. The event of a complication (OR 9.33; P < 0.001) and conversion to open surgery (OR 3.095; P = 0.002) were identified as risk factors for prolonged length of stay whereas robotic surgery (OR 0.62; P = 0.027) was the only independent protective factor. Conclusions: Robotic rectal cancer surgery is strongly associated with better short-term outcomes over laparoscopic surgery.

25 September 2010 in Journal of Gastrointestinal Surgery
Verified
Journal Article
Closed access
PDF file
BNBasil S. Nasir
Basil S. Nasir
EDEric J. Dozois
Eric J. Dozois
RCRobert R. Cima
Robert R. Cima
JPJohn H. Pemberton
John H. Pemberton
BWBruce G. Wolff
Bruce G. Wolff
DLDavid W. Larson
David W. Larson