Opioid Consumption Rate After Foot and Ankle Surgery

Category: Opioid consumption rate and risk factors investigation after foot and ankle surgery Introduction/Purpose: The rapid increase in the consumption of prescription opioids has become one of the leading medical, economical, and sociological burdens in North America. In the United States, orthopedic surgery is the fourth leading specialty in the number of opioids prescribed, and the largest among surgical specialties. There is insufficient evidence to guide surgeons about appropriate opioid prescription amounts after orthopaedic foot and ankle (F&A) procedures. The aim of this study was to determine the opioid consumption rate after foot and ankle procedures, and to identify patient risk factors associated with higher use. Methods: A total of 535 patients who underwent a F&A surgery performed by one orthopedic surgeon from August 2016 to March 2018 were investigated. The study was approved by our IRB. Each patient received a preoperative discussion about postoperative pain and expectations alongside a standardized handout. At the two-week postoperative visit, the patient-reported amount of consumed opioids was recorded. Prescription details, the amount of opioids taken, refill requests, pain-issue related telephone calls, and additional MD/ED visits were also documented. Patient demographics and co-morbidities, use of regional anesthesia, postoperative inpatient hospitalization, surgery type and severity, and pre-operative opioid use were collected retrospectively. Total amounts of morphine equivalents were calculated and converted into oxycodone 5 mg pills for standardization. P-values of <0.05 were considered significant. Results: Two hundred forty-four patients with a mean age of 50 years (±16.3) and a BMI of 29 (±6.1) were included. Sixty-six (27%) patients underwent a soft tissue procedure alone and 178 (73%) underwent a bony procedure. 225 (92.2%) patients received regional block. Patients reported that they consumed only 51.2% of prescribed pills after a bony procedure and 42.4% after a soft tissue procedure, respectively, which resulted in a total of 4,496.2 left over pills that derived from this study amongst only 244 patients enrolled. There were 11 refill requests (4.5%), two (0.8%) additional MD/ED visits, and 19 (7.8%) telephone calls related to pain. BMI, procedure type, and number of opioids prescribed were positively correlated with the consumption rate (P =.002, P<.001, P<0.001, respectively). Conclusion: BMI, surgery type (bony vs. soft tissue), and a higher number of pills dispensed were correlated with higher use in the postoperative period. After an educative discussion on postoperative pain, patients took 42.4% of the prescribed opioid after soft tissue procedures and 51.2% after bony procedures, resulting in a significant number of unused pills now available to the community. Future guidelines are necessary to improve our postoperative pain management, but this study suggests that current amounts of dispensed pills after orthopaedic F&A procedures are approximately twice as high as necessary.

Download Full-text

Opioid Consumption Rate Following Foot and Ankle Surgery

Foot & Ankle International ◽

10.1177/1071100719848354 ◽

2019 ◽

Vol 40 (8) ◽

pp. 905-913 ◽

Cited By ~ 4

Author(s):

Peter Kvarda ◽

Noortje Catharina Hagemeijer ◽

Gregory Waryasz ◽

Daniel Guss ◽

Christopher W. DiGiovanni ◽

...

Keyword(s):

Postoperative Pain ◽

Soft Tissue ◽

Consumption Rate ◽

The United States ◽

Emergency Department Visits ◽

Opioid Consumption ◽

Foot And Ankle ◽

Soft Tissue Procedure ◽

Ankle Surgery ◽

Procedure Type

Background: The rapid increase in the consumption of prescription opioids has become one of the leading medical, economic, and sociological burdens in North America. In the United States, orthopedic surgery is the fourth leading specialty in the number of opioids prescribed, and the largest among all operative specialties. There is insufficient evidence to guide surgeons about appropriate opioid prescription amounts after orthopedic foot and ankle (F&A) procedures. The aim of this study was to determine the opioid consumption rate after foot and ankle procedures and identify risk factors associated with higher use. Methods: A total of 535 patients who underwent foot and/or ankle surgery between August 2016 and March 2018 were included in the study. Each patient received a preoperative discussion about postoperative pain and expectations alongside a standardized handout. At the 2-week postoperative visit, the patients self-reported the amount of consumed opioids. Prescription details, number of opioid pills consumed, refill requests, pain-issue-related telephone calls, and additional physician/emergency department visits were documented. Patient demographics, comorbidities, use of regional anesthesia, hospitalization, surgery type/severity, and preoperative opioid use were collected. A total of 244 patients had a sufficiently complete data set for inclusion in the final cohort. Subjects had a mean age of 50 years (±16.3) and a body mass index (BMI) of 29 (±6.1). Sixty-six (27%) patients underwent a soft tissue procedure alone and 178 (73%) underwent a bony procedure. Results: On average, patients consumed 46.6% of the prescribed pills following a bony procedure and 42.4% after a soft tissue procedure, which resulted in a total of 4496 leftover pills. BMI, procedure type (bony vs soft tissue)/severity, and number of opioids prescribed were positively correlated with elevated consumption rates ( P = .008, P < .001, P < .001, P < .001, respectively). Conclusion: BMI, procedure type, and higher initial pill dispensation correlated with a larger number of consumed pills during the postoperative period. On average, patients took 42.4% of the prescribed opioid after soft tissue procedures and 46.6% after bony procedures, resulting in a significant number of unused pills. Future guidelines are necessary to improve postoperative pain management to prevent narcotic overprescription and minimize the downstream potential for unprescribed community opioid access. Level of Evidence: Level III, retrospective case series, analytic.

Download Full-text

Outcome Following Lower Extremity Nerve Block during Foot and Ankle Surgery: A Systematic Review

Foot & Ankle Orthopaedics ◽

10.1177/2473011420s00228 ◽

2020 ◽

Vol 5 (4) ◽

pp. 2473011420S0022

Author(s):

Arianna L. Gianakos ◽

Filippo Romanelli ◽

Malaka Badri ◽

Naina Rao ◽

Bart Lubberts ◽

...

Keyword(s):

Systematic Review ◽

Pain Management ◽

Postoperative Pain ◽

Continuous Infusion ◽

Nerve Block ◽

Opioid Consumption ◽

Foot And Ankle ◽

Complication Risk ◽

Prospective Comparison ◽

Ankle Surgery

Category: Ankle; Other Introduction/Purpose: The purpose of this study was to perform a systematic review of the current literature assessing the management of pain with various block techniques in the perioperative period during elective foot and ankle surgery. Methods: A review of the literature was performed according to the PRISMA guidelines. Medline, Embase, and Cochrane databases were searched on October 1, 2019. Studies were identified by using synonyms for ‘foot’, ‘ankle’, ‘pain management’, ‘opioid’ and ‘nerve block’. Inclusion criteria were studies that 1) reported and compared the outcomes following various types of peripheral nerve blocks in in foot and ankle surgery, 2) were published in the English language, and 3) were published within the last 10 years. Results: Twenty-four articles evaluating 4,640 patients were included. Sixty-seven percent were randomized controlled trials, 17% were prospective comparison studies, and 17% were retrospective comparison studies. Nerve block techniques included: femoral, adductor canal, sciatic, popliteal, saphenous, and ankle. Ropivacaine and bupivacaine were most commonly utilized. Postoperative opioid consumption and postoperative pain levels were reduced with use of PNB when compared with systemic/local anesthesia, in patients receiving combined popliteal/femoral block, and in patients receiving continuous infusion popliteal block [Table 1, Table 2]. Studies demonstrated higher satisfaction with PNB, continuous infusion, and dual injections [Table 3]. One study reported 7% neurologic related complication risk and demonstrated a higher complication rate when with popliteal versus ankle block. All other studies were equivocal or failed to mention complications. Conclusion: Optimal pain management for elective foot and ankle surgery remains controversial and an ideal protocol from a risk-benefit perspective regarding use of PNB has yet to be established. Our study demonstrates improvements in postoperative pain levels, opioid consumption, and length of stay in patients receiving a PNB when compared with systemic anesthesia. Combined PNB and dual catheter administration may improve outcomes. Unfortunately, little data has been published on risks and tradeoffs in order to help guide patients and surgeons with a well informed shared decision making model. Future studies are needed to better clarify any respective tradeoffs to these options. [Table: see text]

Download Full-text

Does Postoperative Gabapentin Administration Reduce Opioid Consumption after Foot and Ankle Surgery?

Foot & Ankle Orthopaedics ◽

10.1177/2473011420s00010 ◽

2020 ◽

Vol 5 (2) ◽

pp. 2473011420S0001

Author(s):

Haley McKissack ◽

Jun Kit He ◽

Sameer Naranje ◽

Joshua L. Washington ◽

Romil K. Patel ◽

...

Keyword(s):

Postoperative Pain ◽

Postoperative Period ◽

Retrospective Chart Review ◽

Opioid Consumption ◽

Foot And Ankle ◽

Medication Information ◽

Consumption Reduction ◽

Ankle Surgery ◽

Dose Number ◽

Prescription Dose

Category: Ankle; Hindfoot; Midfoot/Forefoot Introduction/Purpose: Prescription opioids are commonly used to control postoperative pain in foot and ankle surgery, but present potentially detrimental side effects including sedation, respiratory depression, and addiction. In foot and ankle surgery, pain is a common cause of delayed hospital discharge and decreased willingness to move, thereby slowing recovery. Gabapentin acts by decreasing lesion-induced hyperexcitability of posterior horn neurons and central sensitization, and has been explored as a potential addition to patients’ pain regimen. Although studies have previously assessed the effect of gabapentin on pain relief, to our knowledge none have evaluated whether gabapentin is effective in opioid consumption reduction beyond the immediate postoperative period. The purpose of this study is to assess whether gabapentin acts synergistically to improve postoperative pain among patients undergoing foot and ankle surgery. Methods: Patients from a single institution who underwent elective foot and ankle surgery were identified using CPT codes 27700, 27702, 27870, 28705, 28715, 28725, 28730, and 28740. All patients prescribed opioids postoperatively were included. A retrospective chart review was conducted for each patient to identify prescription dose, number of pills, date in which prescription was filled, and dates of refills for oxycodone, hydrocodone, oxycodone-acetaminophen, hydrocodone-acetaminophen, tramadol, and gabapentin. Medication information was collected only for prescriptions by the operating surgeon, nurse practitioner, physician assistant, resident, or fellow which were pertinent to the foot/ankle surgery performed; prescriptions from other services or providers were not included in order to ensure that the medications prescribed were specific to postoperative pain. Opioid quantities were converted to morphine equivalents and compared at various time intervals between patients who were prescribed only opioids, and patients who were prescribed opioids and gabapentin. Results: Among patients not taking opioids or gabapentin preoperatively, total morphine equivalents prescribed was significantly less among patients prescribed postoperative gabapentin (177.3 OME) in comparison to those prescribed only opioids (442.2 OME) (p=0.0018) in the 3-6 week postoperative interval. When all patients were analyzed, including those taking preoperative opioids or gabapentin, patients who received postoperative gabapentin were also prescribed significantly fewer OME at weeks 1-2 (p= 0.0270), weeks 3-6 (p = 0.0006), and weeks 7 - 12 (p = 0.0149). Conclusion: Gabapentin may be effective in reducing postoperative opioid consumption beyond the immediate postoperative period among elective foot and ankle surgery patients. Prospective clinical trials are warranted to further validate these results. [Table: see text][Table: see text][Table: see text]

Download Full-text

Opioid Consumption and Time to Return to Work After Percutaneous Foot and Ankle Surgery

Foot & Ankle Orthopaedics ◽

10.1177/2473011419s00016 ◽

2019 ◽

Vol 4 (4) ◽

pp. 2473011419S0001

Author(s):

Jimmy J. Chan ◽

Javier Z. Guzman ◽

Kevin K. Chen ◽

Jesse C. Chan ◽

Ettore Vulcano

Keyword(s):

Soft Tissue ◽

Return To Work ◽

Opioid Consumption ◽

Foot And Ankle ◽

Foot Surgery ◽

Average Return ◽

Forefoot Surgery ◽

Ankle Surgery ◽

The Usa ◽

Long Acting

Category: Hindfoot, Lesser Toes, Midfoot/Forefoot Introduction/Purpose: Orthopaedic surgeons are the 5th highest prescriber for narcotics in the USA. Foot and ankle procedures can be amongst some of the more painful procedures in orthopedics. A recent study demonstrated that patient underwent open foot and ankle surgeries averaged 27.2 tablets of narcotics with 37% of patients unwilling to stop at 3-month post-operative visit. Percutaneous techniques for foot and ankle procedures were recently approved in the U.S., which allow for significantly smaller incisions and minimal soft tissue disruption, which may potentially decrease post-operative pain and allow faster recovery. The purpose of this study is to assess the total opioid consumption and time for return to work following percutaneous foot and ankle surgery. Methods: In this prospective cohort study, 50 consecutive patients underwent percutaneous foot surgery (bony procedures with or without soft tissue work) by a single surgeon. All surgeries were outpatient procedures and performed under general anesthesia with a long-acting popliteal nerve block. All patients were prescribed 30 tablets of 5 mg oxycodone, 50 tablets of 500 mg acetaminophen, and 9 tablets of 600 mg ibuprofen post-operatively for pain control. All patients were given a log sheet to record number of pain medications taken during the first 14 post-operative days. The log sheet and leftover pills were collected and counted to confirm the amount of pain medication used at 2-week post-operative visit. Time return to work was also recorded in subsequent follow-up appointment. Results: All 50 patients returned their log sheet at 2-week post-operative visit. Mean age was 47.1 years. N=36 (72%) were forefoot surgeries, N=2 (4%) midfoot, N=9 (18%) hindfoot, and N=3 (6%) combined. Average oxycodone tablets taken during the first 14 days after surgery was 3.3 tablets. By the 14th day, no patient was taking any narcotic medication. The average return to work was 18.9 days post-operatively. Patients with forefoot surgery averaged 2.2 tablets of oxycodone with return to work at 10.4 days. Midfoot surgery patients averaged 3.5 tablets with return to work at 33 days. Hindfoot surgery patients averaged 5.3 tablets with return to work at 38.9 days. Combined foot surgery patients averaged 11 tablets with return to work at 54.3 days. Conclusion: This study demonstrated that percutaneous foot and ankle surgery has significant reduction and cessation in narcotic consumption post-operatively when compared to the reported values with open procedures in current literature.

Download Full-text

Effect of Postoperative Gabapentin Administration on Opioid Consumption

Foot & Ankle Orthopaedics ◽

10.1177/2473011419s00301 ◽

2019 ◽

Vol 4 (4) ◽

pp. 2473011419S0030

Author(s):

Haley McKissack ◽

Jun Kit He ◽

Robert D. Stibolt ◽

Aaradhana J. Jha ◽

Perry Washburn ◽

...

Keyword(s):

Postoperative Pain ◽

Postoperative Period ◽

Retrospective Chart Review ◽

Opioid Consumption ◽

Foot And Ankle ◽

Time Intervals ◽

Consumption Reduction ◽

Ankle Surgery ◽

Dose Number ◽

Prescription Dose

Category: Foot & Ankle Surgery Introduction/Purpose: Prescription opioids are commonly used to control postoperative pain in foot and ankle surgery, but present potentially detrimental side effects including sedation, respiratory depression, and addiction. In foot and ankle surgery, pain is a common cause of delayed hospital discharge and decreased willingness to move, thereby slowing recovery. Gabapentin acts by decreasing lesion-induced hyperexcitability of posterior horn neurons and central sensitization, and has been explored as a potential addition to patients’ pain regimen. Although studies have previously assessed the effect of gabapentin on pain relief, to our knowledge none have evaluated whether gabapentin is effective in opioid consumption reduction beyond the immediate postoperative period. This study aims to assess whether gabapentin acts synergistically to improve postoperative pain among patients undergoing foot and ankle surgery. Methods: Patients from a single institution who underwent elective foot and ankle surgery were identified using CPT codes 27700, 27702, 27870, 28705, 28715, 28725, 28730, and 28740. Those prescribed opioids postoperatively were included. A retrospective chart review was conducted for each patient to identify prescription dose, number of pills, date in which prescription was filled, and dates of refills for oxycodone, hydrocodone, oxycodone-acetaminophen, hydrocodone-acetaminophen, tramadol, and gabapentin. Medication information was collected only for prescriptions by the operating surgeon, nurse practitioner, physician assistant, resident, or fellow which were pertinent to the foot/ankle surgery performed; prescriptions from other services or providers were not included in order to ensure that the medications prescribed were specific to postoperative pain. Opioid quantities were converted to morphine equivalents and compared at various time intervals between patients who were prescribed only opioids, and patients who were prescribed opioids and gabapentin. Results: Among patients prescribed gabapentin plus opioids, total opioids prescribed (in morphine equivalents, OME) was 68.33, 221.25, 87.50, and 400.83 at weeks 1-2, 3-6, 7-12, and greater than 12, respectively. Although not statistically significantly different, patients prescribed only opioids had greater average amounts of opioids prescribed at all time intervals, equaling 98.34 OME, 553.52 OME, 540.53 OME, and 766.25 OME at weeks 1-2, 3-6, 7-12, and greater than 12, respectively. When excluding patients taking opioids preoperatively, total morphine equivalents prescribed was significantly less among patients prescribed gabapentin (196.94 OME) in comparison to those prescribed only opioids (457.41 OME) (p=0.0255). Conclusion: The findings of this study suggest that gabapentin may be effective in reducing postoperative opioid consumption beyond the immediate postoperative period among elective foot and ankle surgery patients. Gabapentin may be particularly beneficial within the three to six week postoperative period. Prospective clinical trials are warranted to further validate these results.

Download Full-text

Self-Reported Pain Tolerance and Opioid Pain Medication Use After Foot and Ankle Surgery

Foot & Ankle Specialist ◽

10.1177/1938640020970371 ◽

2020 ◽

pp. 193864002097037

Author(s):

Laura E. Sokil ◽

Ryan G. Rogero ◽

Elizabeth L. McDonald ◽

Daniel Corr ◽

Daniel Fuchs ◽

...

Keyword(s):

Postoperative Pain ◽

Pain Threshold ◽

Statistical Significance ◽

Pain Tolerance ◽

Opioid Consumption ◽

Prescription Opioid ◽

Bivariate Analysis ◽

Foot And Ankle ◽

Opioid Use ◽

Ankle Surgery

Background: Orthopaedic surgeons must consider their postoperative pain management strategies to minimize harm from prescription opioid use. Patients often reference their pain threshold to predict how they will tolerate surgical pain and the need for postoperative analgesia, but the direct relationship between these factors has not yet been studied. The purpose of this study was to determine the relationship between patients’ self-reported pain tolerance and prescription opioid usage after foot and ankle surgery. Methods: This is a retrospective follow-up of a prospective cohort study of adult patients who underwent outpatient foot and ankle surgeries. Patient and procedural demographics, opioid pills dispensed, and opioid pills consumed by the first postoperative visit were obtained. Patients were contacted at a mean of 13.1 ± 4.0 months postoperatively and asked to respond to the qualitative statement “Pain doesn’t bother me as much as it does most people.” Patients were also asked their quantitative pain threshold (0-100), with 0 being “very pain intolerant” and 100 being a “very high pain tolerance,” as well other questions regarding past surgical and narcotic consumption history. Results: Of the 700 survey respondents, the average age was 50.9 years and 34.7% were male. Bivariate analysis determined that predictors of lower postoperative opioid consumption included higher quantitative ( P = .047) and qualitative ( P = .005) pain tolerance scores. Multivariate analysis for the entire cohort demonstrated that higher qualitative pain threshold was associated with lower postoperative opioid consumption ( P = .005) but this did not meet statistical significance as an independent predictor of the top quartile of pill consumers. Conclusion: Assessment of both qualitative and quantitative score of patients’ pain threshold prior to surgery may assist the surgeon in tailoring postoperative pain control. Additionally, asking this question can create an opportunity for educating patients regarding responsible utilization of narcotic medication. Levels of Evidence: Level III

Download Full-text

Incidence and Risk Factors of Symptomatic Venous Thromboembolism Following Foot and Ankle Surgery

Foot & Ankle International ◽

10.1177/1071100718794851 ◽

2018 ◽

Vol 40 (1) ◽

pp. 98-104 ◽

Cited By ~ 5

Author(s):

Johanna Marie Richey ◽

Miranda Lucia Ritterman Weintraub ◽

John M. Schuberth

Keyword(s):

Risk Factors ◽

Hormone Replacement ◽

Case Series ◽

Foot And Ankle ◽

Retrospective Case ◽

Level Of Evidence ◽

Ankle Surgery ◽

History Of ◽

Low Incidence ◽

Predictive Risk

Background: The incidence rate of venous thrombotic events (VTEs) following foot and ankle surgery is low. Currently, there is no consensus regarding postoperative prophylaxis or evidence to support risk stratification. Methods: A 2-part study assessing the incidence and factors for the development of VTE was conducted: (1) a retrospective observational cohort study of 22 486 adults to calculate the overall incidence following foot and/or ankle surgery from January 2008 to May 2011 and (2) a retrospective matched case-control study to identify risk factors for development of VTE postsurgery. One control per VTE case matched on age and sex was randomly selected from the remaining patients. Results: The overall incidence of VTE was 0.9%. Predictive risk factors in bivariate analyses included obesity, history of VTE, history of trauma, use of hormonal replacement or oral contraception therapy, anatomic location of surgery, procedure duration 60 minutes or more, general anesthesia, postoperative nonweightbearing immobilization greater than 2 weeks, and use of anticoagulation. When significant variables from bivariate analyses were placed into the multivariable regression model, 4 remained statistically significant: adjusted odds ratio (aOR) for obesity, 6.1; history of VTE, 15.7; use of hormone replacement therapy, 8.9; and postoperative nonweightbearing immobilization greater than 2 weeks, 9.0. The risk of VTE increased significantly with 3 or more risk factors ( P = .001). Conclusion: The overall low incidence of VTE following foot and ankle surgery does not support routine prophylaxis for all patients. Among patients with 3 or more risk factors, the use of chemoprophylaxis may be warranted. Level of Evidence: Level III, retrospective case series.

Download Full-text

Incidence of and Risk Factors for Venous Thromboembolism After Foot and Ankle Surgery

Foot & Ankle Specialist ◽

10.1177/1938640018769740 ◽

2018 ◽

Vol 12 (3) ◽

pp. 218-227 ◽

Cited By ~ 6

Author(s):

Samuel R. Huntley ◽

Eildar Abyar ◽

Eva J. Lehtonen ◽

Harshadkumar A. Patel ◽

Sameer Naranje ◽

...

Keyword(s):

Risk Factors ◽

Venous Thromboembolism ◽

Female Gender ◽

Risk Groups ◽

Foot And Ankle ◽

Improvement Program ◽

True Incidence ◽

Ankle Surgery ◽

Data Files ◽

Retrospective Comparative Study

Background: Venous thromboembolism (VTE) is a rare but potentially lethal complication after orthopaedic foot and ankle surgery. The true incidence of VTE after orthopaedic foot and ankle surgery stratified by specific procedure has yet to be examined. The purpose of this study is to report the incidence of and identify risk factors for VTE in a large sample of patients receiving orthopaedic foot and ankle surgery. Methods: In this study, we retrospectively analyzed data from the National Surgical Quality Improvement Program 2006 to 2015 data files. The incidence of VTE was calculated for 30 specific orthopaedic foot and ankle surgeries and for 4 broad types of foot and ankle surgery. Demographic, comorbidity, and complication variables were analyzed to determine associations with development of VTE. Results: The overall incidence of VTE in our sample was 0.6%. The types of procedures with the highest frequency of VTE were ankle fractures (105/15 302 cases, 0.7%), foot pathologies (28/5466, 0.6%), and arthroscopy (2/398, 0.5%). Female gender, increasing age, obesity, inpatient status, and nonelective surgery were all significantly associated with VTE. Conclusion: Although VTE after orthopaedic foot and ankle surgery is a rare occurrence, several high-risk groups and procedures may be especially indicated for chemical thromboprophylaxis. Levels of Evidence: Level III: Retrospective, comparative study

Download Full-text

Postoperative Tourniquet Pain in Patients Undergoing Foot and Ankle Surgery

Foot & Ankle Orthopaedics ◽

10.1177/2473011418s00423 ◽

2018 ◽

Vol 3 (3) ◽

pp. 2473011418S0042

Author(s):

Ashish Shah ◽

Eva Lehtonen ◽

Samuel Huntley ◽

Harshadkumar Patel ◽

John Johnson ◽

...

Keyword(s):

Blood Pressure ◽

Postoperative Pain ◽

Length Of Stay ◽

Systolic Blood Pressure ◽

Foot And Ankle ◽

Opioid Use ◽

Tourniquet Time ◽

Pain Scores ◽

Regional Nerve Block ◽

Ankle Surgery

Category: Other Introduction/Purpose: The tourniquet is commonly used in orthopedic surgeries on the upper and lower extremities to reduce blood loss, improve visualization, and expedite the surgical procedure. However, tourniquets have been associated with multiple local and systemic complications, including postoperative pain. Guidelines vary regarding ideal tourniquet pressure and duration, while the practice of fixed, high tourniquet pressures remains common. The relationship between tourniquet pressure, duration, and postoperative pain has been studied in various orthopaedic procedures, but these relationships remain unknown in foot and ankle surgery. The purpose of this study was to assess for correlation between excessive tourniquet pressure and duration and the increased incidence of tourniquet pain in foot and ankle surgery patients. Methods: Retrospective chart review was performed for 132 adult patients who underwent foot and ankle surgery with concomitant use of intraoperative tourniquet at a single institution between August and December of 2015. Patients with history of daily opioid use of 30 or more morphine oral equivalents for greater than 30 days, patients who underwent foot and ankle surgery without regional nerve block, patients deemed to have failed regional nerve block, and patients who underwent foot and ankle surgery without tourniquet use were excluded. Patient’s baseline systolic blood pressure, tourniquet pressure and duration, tourniquet deflation time, tourniquet reinflation pressure and duration, intraoperative blood pressure and heart rate changes, intra-operative opioid consumption, PACU pain scores, PACU opioid consumption, and PACU length of stay were collected. Statistical correlation between tourniquet pressure and duration and postoperative pain scores, pain location, narcotic use, and length of stay in PACU was assessed using linear regression in SPSS. Results: Average age of patients was 47.6 years (Range: 16 - 79). Tourniquet pressure was 280 mmHg in 90.6% of patients (Range: 250-300 mmHg). Only 3.8% percent of patients had tourniquet pressures 100-150 mmHg above systolic blood pressure. Mean tourniquet time was 106.2 ± 40.1 min. Tourniquet time showed significant positive correlation with morphine equivalents used in the perioperative period (N = 121; r = 0.406; p < 0.001). Long tourniquet times (= 90 minutes) were associated with greater intraoperative opioid use than short tourniquet times (= 90 minutes) (19 mg ± 22 mg vs. 5 mg ± 11.6 mg; p <0.001). Tourniquet duration and PACU length of stay had a positive association (R2 = 0.4). Conclusion: The majority of cases of foot and ankle surgery at our institution did not adhere to current tourniquet use guidelines, which recommend tourniquet pressure between 100 and 150 mmHg above patient’s systolic blood pressure. Prolonged tourniquet times at high pressures not based on limb occlusion pressure, as observed in our study, lead to increased pain and opioid use and prolonged time in PACU. Basing tourniquet pressures on limb occlusion pressures could likely improve the safety margin of tourniquets, however randomized studies need to be completed to confirm this.

Download Full-text