Obstetrics & Gynecology:
Enhanced Recovery in Gynecologic Surgery
Kalogera, Eleftheria MD; Bakkum-Gamez, Jamie N. MD; Jankowski, Christopher J. MD; Trabuco, Emanuel MD; Lovely, Jenna K. DrPH; Dhanorker, Sarah; Grubbs, Pamela L. RN, CNS; Weaver, Amy L.; Haas, Lindsey R.; Borah, Bijan J. PhD; Bursiek, April A. RN; Walsh, Michael T. MD; Cliby, William A. MD; Dowdy, Sean C. MD
Division of Gynecologic Surgery, the Department of Anesthesiology, Hospital Pharmacy Services, the Department of Nursing, the Division of Biomedical Statistics and Informatics, and the Department of Health Sciences, Division of Health Care Policy and Research, Mayo Clinic, Rochester, Minnesota.
Corresponding author: Sean C. Dowdy, MD, 200 1st Street SW, Rochester, MN 55905; e-mail: firstname.lastname@example.org.
Supported in part by the Mayo Clinic Comprehensive Cancer Center (P30 CA 15083; S.C.D.) and the Office of Women's Health Research Building Interdisciplinary Careers in Women's Health (BIRCWH award K12 HD065987; J.N.B.-G.).
Financial Disclosure The authors did not report any potential conflicts of interest.
The authors thank Drs. David Larson and Robert Cima from Colorectal Surgery who pioneered enhanced recovery at the Mayo Clinic, Rochester and served as important consultants throughout this project.
Presented at the 14th Biennial meeting of the International Gynecologic Cancer Society, October 13-16, 2012, Vancouver, Canada.
OBJECTIVE: To investigate the effects of enhanced recovery (a multimodal perioperative care enhancement protocol) in patients undergoing gynecologic surgery.
METHODS: Consecutive patients managed under an enhanced recovery pathway and undergoing cytoreduction, surgical staging, or pelvic organ prolapse surgery between June 20, 2011, and December 20, 2011, were compared with consecutive historical controls (March to December 2010) matched by procedure. Wilcoxon rank-sum, χ2, and Fisher’s exact tests were used for comparisons. Direct medical costs incurred in the first 30 days were obtained from the Olmsted County Healthcare Expenditure and Utilization Database and standardized to 2011 Medicare dollars.
RESULTS: A total of 241 enhanced recovery women in the case group (81 cytoreduction, 84 staging, and 76 vaginal surgery) were compared with women in the control groups. In the cytoreductive group, patient-controlled anesthesia use decreased from 98.7% to 33.3% and overall opioid use decreased by 80% in the first 48 hours with no change in pain scores. Enhanced recovery resulted in a 4-day reduction in hospital stay with stable readmission rates (25.9% of women in the case group compared with 17.9% of women in the control group) and 30-day cost savings of more than $7,600 per patient (18.8% reduction). No differences were observed in rate (63% compared with 71.8%) or severity of postoperative complications (grade 3 or more: 21% compared with 20.5%). Similar, albeit less dramatic, improvements were observed in the other two cohorts. Ninety-five percent of patients rated satisfaction with perioperative care as excellent or very good.
CONCLUSIONS: Implementation of enhanced recovery was associated with acceptable pain management with reduced opioids, reduced length of stay with stable readmission and morbidity rates, good patient satisfaction, and substantial cost reductions.
LEVEL OF EVIDENCE: II
Over the previous decade, important progress has been achieved in both benign and oncologic gynecologic surgery, including further refinement of minimally invasive surgery, introduction of the sentinel lymph node concept, individualized lymphadenectomy for endometrial cancer, and adoption of optimal cytoreduction to no visible residual disease for patients with ovarian cancer.1–3 These practice changes have reduced surgical morbidity, shortened recovery, and improved oncologic outcomes.1–3 However, little attention has been given to the optimization of perioperative care. Few data exist to support traditional components of perioperative care including preoperative bowel preparation, prolonged fasting and use of nasogastric tubes, intraabdominal drains, bed rest, and gradual introduction of oral feeding. Longer length of hospital stay has been correlated with lower quality of life, and health care institutions are subject to increasing pressures to reduce costs.4
A number of management pathways has been introduced primarily in colorectal surgery to hasten recovery and attenuate the stress response associated with surgery.5,6 Key elements common to all enhanced recovery pathways (a term coined by Dr. Kehlet5,6) include: preoperative patient education, reduction of preoperative fasting, omission of bowel preparation, perioperative normovolemia, limited use of nasogastric tubes and drains, early removal of urinary catheters, aggressive multimodal analgesia to minimize opiate consumption, early postoperative mobilization, prokinetics to enhance gastrointestinal motility, and early enteral nutrition. A growing body of evidence outside of gynecology including randomized controlled trials7–10 has shown that enhanced recovery speeds convalescence and reduces morbidity and cost while maintaining patient satisfaction and quality of life.9,11–13
Few groups have tested enhanced recovery in gynecologic surgery, and most cohorts were small and included only patients with benign disorders.14–20 The purpose of this investigation was to examine the effect of our enhanced recovery pathway on hospital length of stay, morbidity, cost, and patient satisfaction for women undergoing major abdominal surgery for gynecologic malignancies and vaginal reconstructive procedures for pelvic organ prolapse.
A multimodal enhanced recovery pathway was developed by a multidisciplinary team of anesthesiologists, gynecologic oncologists, urogynecologists, pharmacists, and nursing staff based on the most current recommendations from the literature but accounting for the unique issues presented by gynecologic surgical patients (Box 1). Enhanced recovery was instituted on June 20, 2011, as a quality improvement practice change and was used for all inpatients treated in the Division of Gynecologic Surgery, Mayo Clinic, Rochester, Minnesota, from that date forward. Three cohorts were analyzed: 1) staging laparotomy for gynecologic malignancies including hysterectomy, lymphadenectomy and omentectomy only; 2) complex cytoreductive surgery cases, which included patients described in cohort 2 in addition to bowel resection, splenectomy, diaphragmatic resection, extensive cytoreduction, or all of these; and 3) urogynecologic pelvic organ prolapse surgery including posthysterectomy pelvic floor repair or vaginal hysterectomy with concomitant repairs (isolated hysterectomies were not included); the latter group of procedures will be referred to in the article as vaginal surgery cases.
Box 1 Enhanced Recovery Pathway Cited Here...
This was a retrospective cohort study. The power calculation was performed based on our main outcome, reduction in hospital length of stay. To achieve 80% power to detect a statistically significant 2-day reduction in length of stay in the staging cohort as well as the complex cytoreductive cohort, a total of 39 patients were needed in each cohort; 15 patients were necessary in the pelvic organ prolapse cohort to detect a 1-day reduction in length of stay. Consecutive patients within these three cohorts were prospectively identified from June 20, 2011, to December 20, 2011, and followed for at least 30 days. Enhanced recovery patients were then compared with consecutive historic controls matched one to one by procedure type from March 1, 2010, to December 23, 2010, before enhanced recovery was implemented. The only exclusion criterion was lack of research authorization. Of note, no significant changes in technology, surgical techniques, or surgical teams took place between the study period and the period from which historic controls were drawn. Before enhanced recovery, postoperative management was not standardized among the seven gynecologic oncologists and four urogynecologists at our institution. However, bowel preparations, caloric restriction, intraoperative hypervolemia, use of patient-controlled analgesia, and the use of surgical drains and catheters were routine practices. Local wound infiltration, triple antiemetics, and prokinetics were generally not used in historical controls. An interim analysis was performed at 3 months to confirm that this practice change did not increase complication rates.
Table. No title avai...Image Tools
Relevant data were abstracted from our electronic medical records (including outside medical records when necessary). For hospital length of stay, the day of surgery was defined as postoperative day 0. Total length of stay was calculated by adding readmission length of stay (if readmission occurred) to primary hospitalization length of stay. Postoperative hypotension was defined as a 10% decrease from the preoperative mean arterial pressure. Opioid use was quantified using oral morphine equivalents.21 “Opioid tolerance” was defined as at least 60 mg oral morphine equivalents per day. The efficacy of pain control was assessed using pain scores on a scale of 1–10. The Accordion severity grading system was used to measure severity of postoperative complications; grade 3 and higher complications were considered severe.22 Return of gastrointestinal function was defined as positive flatus or bowel movement. Patients were discharged when all of the following criteria were met: pain controlled with oral medications alone, tolerating solid food without intravenous hydration, independently ambulatory, and no suspicion of a complication. Confidential patient satisfaction surveys were administered by nonstudy providers to all patients before dismissal as part of a continuous assessment of our surgical inpatient unit.
Cost data for the study patients were captured from Olmsted County Healthcare Expenditure and Utilization Database, a research database jointly funded by Mayo Clinic's Division of Health Care Policy and Research and the National Institutes of Health-funded Rochester Epidemiology Project.23 This unique database provides standardized inflation-adjusted estimate of costs in 2011 constant dollars (regardless of payer or plan) for every service and procedure received by patients seen at the Mayo Clinic. However, the costs of outpatient pharmacy services and nursing home care were not captured in the Olmsted County Healthcare Expenditure and Utilization Database.
This investigation was reviewed by the Mayo Foundation institutional review board and as a quality improvement project was considered exempt from institutional review board review for initial implementation (45 CFR 46.101, item 4); however, institutional review board approval was obtained retrospectively for publication of findings. In accordance with the Minnesota Statute for Use of Medical Information in Research, only those patients who consented to the use of their medical records were included in final analysis and publication.
Categorical variables were summarized using actual counts (%) and continuous variables using mean (standard deviation) or median (interquartile range) as appropriate. The χ2 test or the Fisher’s exact test, as appropriate when an expected cell count in a contingency table was less than five, were used to compare categorical variables and the Wilcoxon rank-sum test for continuous variables. Cost analysis included all-cause 30-day postsurgical costs. The difference in median cost between groups was tested using a Wilcoxon rank-sum test. P<.05 was considered statistically significant for all statistical comparisons. Statistical analyses were performed using the SAS 9.2 software package.
A total of 241 enhanced recovery cases (81 complex cytoreductive, 84 staging, and 76 vaginal surgery cases) and 235 historic controls (78 complex cytoreductive, 80 staging, and 77 vaginal cases) met criteria for inclusion in the study analyses (after 14 patients, four women in the case group and 10 women in the control group, were excluded as a result of lack of research consent).
In the complex cytoreductive cohort, patient baseline, operative, and postoperative characteristics are shown in Table 1. Clinically significant differences between women in the case group and women in the control group were limited to a higher proportion of clean wounds and “opioid-tolerant” patients in the enhanced recovery cohort.
Compliance with enhanced recovery pathway is shown in Appendix 1 (available online at http://links.lww.com/AOG/A405). The lower than expected rate of preload carbohydrate drink administration was the result of a diminished supply of the product at our pharmacies (the use of this product has since been discontinued as a result of cost considerations). The rate of preoperative celecoxib and postoperative nonsteroidal anti-inflammatory drug administration is reflective of the fact that these medications were omitted in patients with contraindications. The expected shift from a single-drug to multimodal postoperative nausea and vomiting prophylaxis protocol was observed with almost all enhanced recovery patients receiving at least two antiemetic medications intraoperatively.
Table 1-b Patient Ba...Image Tools
Control patients received on average 1,059 mL more crystalloid intraoperatively compared with enhanced recovery patients (P<.001). Despite administration of less crystalloid, there was no increase in the frequency or duration of hypotension intraoperatively (P=.25). Women in the case group received significantly less opioids (80% reduction in first 48 hours after return to room) with an increase in the use of scheduled nonsteroidal anti-inflammatory drugs, acetaminophen, and tramadol (Appendix 2, available online at http://links.lww.com/AOG/A406). Patient-controlled analgesia was infrequently required in the women in the case group compared with the historic controls (women in the enhance recovery group: 27 [33%] compared with women in the historic control group:77 [98.7%], P<.001) (Appendix 1, http://links.lww.com/AOG/A405). Despite a significant reduction in opioid and patient-controlled analgesia use, pain scores were unchanged in the women in the case group compared with women in the control group with the exception of an improvement at the time of return to room after postanesthesia care unit discharge (mean [standard deviation]: women in the case group 4.4 [2.3] compared with women in the control group 5.6 [2.6], P=.003) (Appendix 3, available online at http://links.lww.com/AOG/A407).
Although a more aggressive postoperative nausea and vomiting protocol was adopted intraoperatively, more nausea and vomiting was observed in the enhanced recovery group with a significant increase on postoperative day 2 (women in the case group compared with women in the control group: nausea 45 of 81 [55.6%] compared with 30 of 78 [38.5%], P=.031; vomiting 14 of 81 [17.3%] compared with two of 78 [2.6%], P=.002). Overall, the amount of antiemetic medication that was required to control patients' symptoms was not different between groups. Women in the case group had a 1-day earlier return of bowel function compared with the historic controls (P<.001). The rate of postoperative ileus was no different between groups.
Thirty-day rates of complications, readmission, mortality, and the severity of complications did not differ between groups. Introduction of enhanced recovery resulted in a 4-day reduction in the mean length of stay compared with historic controls (P<.001). One-third of patients in the complex cytoreductive enhanced recovery group were discharged within 4 days of surgery compared with only 6.4% of women in the control group (P<.001). The reduction in length of stay was accompanied by a 30-day total cost of care savings of more than $7,600 per patient for this cohort, an 18.8% reduction (Table 2). Thus, more than $500,000 in savings was achieved for just 81 patients (P=.006).
In the staging cohort, patient baseline, operative, and postoperative characteristics were comparable to historic controls in all categories except median operative time, which was shorter by 30 minutes in the enhanced recovery group (median [interquartile range] 151 minutes [114–211] compared with 177 minutes [140–220], respectively; P=.042) (Table 1).
Like in the complex cytoreductive cohort, adherence to the protocol was good with regard to preoperative management, postoperative nausea and vomiting prophylaxis, perioperative fluid management, and a reduction in opioid use (Appendix 1, available online at http://links.lww.com/AOG/A405). Patient-controlled analgesia was used 10 times less frequently in women in the case group compared with women in the control group (seven of 84 [8.3%] compared with 78 of 80 [97.5%], respectively; P<.001, Appendix 1 [available online at http://links.lww.com/AOG/A405]); nevertheless, a significant improvement in mean pain scores at the time of return to room was noted in women in the case group (4.3 compared with 5.2, respectively; P=.030). Women in the case group experienced significantly more nausea on the day of surgery after return to the room (28 of 84 [33.3%] compared with 15 of 80 [18.8%]; P=.034). Similar to the complex cytoreductive group, 30-day outcomes remained unchanged after implementing enhanced recovery (Table 3).
Enhanced recovery resulted in a 2-day reduction in the mean length of stay for this cohort (Table 3). Length of stay was 3 days or less in 26.2% of women in the case group compared with 5% of historical controls (P<.001). Cost savings were more than $3,000 per patient, although not statistically significant in this analysis (Table 2).
In the vaginal surgery cohort, there were no clinically significant differences between women in the case group and women in the control group with regard to patient baseline, operative, or postoperative characteristics (Table 1). Adherence to the protocol was very good with regard to preoperative management, nausea and vomiting prophylaxis, and postoperative pain management (Appendix 1, available online at http://links.lww.com/AOG/A405). In contrast to the laparotomy cases, the intraoperative fluid management did not differ between groups given that conservative volumes of intraoperative fluids were administered during these cases at baseline. However, a significant reduction in the volume of crystalloids administered on postoperative day 0 was observed in the women in the case group compared with the women in the control group (median [interquartile range] 176 mL [0–310] compared with 575 [350–1,000], respectively; P<.001). Intrathecal anesthesia was used more commonly in the enhanced recovery cohort (31 of 76 [40.8%] compared with eight of 77 [10.4%]; P<.001). Similar to the previous two laparotomy cohorts, patient-controlled analgesia was used much less commonly in the enhanced recovery cohort (seven of 76 [9.2%] compared with 61 of 77 [79.2%]; P<.001, Appendix 1 [available online at http://links.lww.com/AOG/A405]).
A significant improvement in the mean pain score from admission to the postanesthesia care unit up until 4 hours after return to the room was observed in the women in the case group (postanesthesia care unit: 1.9 compared with 3.3, P<.001; return to room: 2.8 compared with 4.7, P<.001; 4 hours after return to room: 2.9 compared with 3.9, P=.015) reflective of the effect of intrathecal anesthesia or analgesia. More than 4 hours after return to the room, mean pain scores were comparable between groups. Again, vomiting was more frequently observed in the enhanced recovery group on postoperative day 0 (eight of 76 [10.5%] compared with one of 77 [1.3%], respectively; P=.015). There were no differences in 30-day outcomes (Table 3). A significant reduction in mean length of stay was observed after implementing enhanced recovery; almost half (46.1%) of the women in the case group were discharged the day after surgery compared with only 6.5% of women in the control group (P<.001) (Table 3). Within the enhanced recovery cohort, patients who received intrathecal anesthesia had a significantly shorter length of stay than those who did not (median length of stay 2 days compared with 3 days; P=.021) with no difference in hospital costs (median hospital costs intrathecal $9,381.41 compared with no intrathecal $9,973.54; P=.51).
Table 3-a Outcomes i...Image Tools
Patient satisfaction was high in all studied aspects of perioperative care including patient education, quality of care during hospitalization, the discharge process, and pain management with 90–99% rating satisfaction as excellent or very good (Appendix 4, available online at http://links.lww.com/AOG/A408). Satisfaction with control of postoperative nausea and vomiting was rated as excellent or very good in 87%. Patient satisfaction surveys were not available in historic controls.
Dogmatic interventions that adversely affect postoperative recovery include the use of bowel preparations, caloric restriction, intraoperative hypervolemia, excessive opioid use, prolonged immobilization, and the use of drains and catheters. Enhanced recovery challenges traditional perioperative paradigms and has been shown to hasten postoperative recovery in colorectal surgery.7,8,12,13,24–26 Prior investigations of enhanced recovery have shown only preliminary evidence of benefit18,19 and data are very limited for patients with gynecologic malignancies.18,19 One investigation describes 19 cases over 8 years,18 whereas the other included 69 patients who underwent cytoreduction with a median operating time of only 2 hours.19 The current investigation provides data demonstrating that our enhanced recovery pathway is associated with more rapid recovery when implemented in patients undergoing major abdominal surgery for gynecologic malignancies or in patients undergoing pelvic organ prolapse surgery. Specifically, use of enhanced recovery resulted in earlier return of gastrointestinal function, stable pain scores despite significantly reduced opioid use, excellent patient satisfaction despite a 4-day reduction in length of hospital stay, 30-day cost savings of more than $7,600 per patient (19% reduction), and stable complication and readmission rates. As suggested by Maessen et al,27 continuous monitoring of adherence to the protocol elements will be necessary to ensure that the desired outcomes persist beyond the initial study period.
We consider all interventions (or lack thereof) outlined in Box 1 as critical to success, and clinicians should not expect similar benefits in their own patients by simply adopting early feeding alone. However, a few interventions deserve particular mention. We believe that euvolemia is paramount to the improved clinical appearance of patients the day after surgery and for the improved outcomes in this investigation.28,29 Partnering with anesthesiology to achieve this was critical. In our investigation, perioperative fluid restriction did not increase the duration or frequency of hypotension within the first 48 hours after surgery nor did it increase the incidence of acute renal failure. It is worth highlighting that transient oliguria (up to 24 hours after surgery) with urine output as low as 20 mL/h is a normal response to surgical stress and does not require intervention.30,31 On the other hand, avoidance of preoperative dehydration (eg, mechanical bowel preparation) and caloric restriction, the use of prokinetics, and initiation of early feeding all contributed to acceleration of gastrointestinal function.10,17,18,32 In our complex cytoreductive cohort, roughly 40% of women in the case group underwent large bowel resection with no measurable untoward effects relative to women in the control group with regard to anastomotic leaks and abscesses. Despite its merits, a recent review and meta-analysis concluded that early feeding is associated with increased postoperative nausea and vomiting32 and might explain the higher frequency of nausea and vomiting observed in our investigation despite aggressive multimodal postoperative nausea and vomiting prophylaxis. Despite this increase in nausea and vomiting, 87% rated their satisfaction with nausea and vomiting control as excellent or very good, suggesting that early feeding is overall well tolerated.
Epidural analgesia and patient-controlled analgesia have been used commonly in prior enhanced recovery trials.33,34 After significant debate, our investigative group elected to omit epidural analgesia in patients undergoing laparotomy given concerns about fluid shifts and hypotension in a patient population who commonly present with large cancer burdens, poor nutrition, and several liters of ascites, particularly when adopting a strategy of euvolemia intraoperatively. Excellent results were obtained even without the use of intrathecal analgesia. However, patients undergoing pelvic organ prolapse surgery appeared to derive significant benefit from intrathecal anesthesia, and in the future, an attempt will be made to increase use in our institution.
Weaknesses of this investigation include that it was not designed as a randomized clinical trial. Considering accumulating data on the success of enhanced recovery pathways in other surgical subspecialties, our group felt that this initiative was best executed as a quality improvement study. However, we used historical controls 6 months before adoption of this pathway such that changes in practice patterns, techniques, and staffing were minimal between groups. Sample size was powered to detect differences in hospital length of stay. Thus, although we found no changes in morbidity, mortality, or readmission between groups, this study may be underpowered to detect such differences. Lastly, given the large number of changes contained within the management pathway, it is impossible to determine which intervention had the greatest effect on recovery. However, all of the elements of this pathway have merit with respect to various end points, including patient comfort and satisfaction, even if they potentially do not affect cost or length of stay. Furthermore, there are virtually no costs required to implement this pathway.
In summary, institution of an enhanced recovery pathway in gynecologic surgery resulted in significant improvement of postoperative outcomes including earlier return of gastrointestinal function, excellent pain management with significantly reduced opioid requirements, decreased length of hospital stay, excellent patient satisfaction combined with substantial cost reductions while maintaining stable complication and readmission rates. Women undergoing the most complex oncologic procedures appear to have the most to gain from this management strategy. At present all women undergoing inpatient gynecologic surgery at Mayo Clinic, regardless of diagnosis, are managed under the enhanced recovery pathway.
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