Pain In Postanesthesia Care Unit Research Articles

Perioperative Risk Factors for Postoperative Delirium in Non-Dementia Older Patients after Non-Cardiac Surgery and Anesthesia: A Prospective Study.

To investigate the incidence and perioperative risk factors for postoperative delirium (POD) in non-dementia older patients who underwent anesthesia for non-cardiac surgery. This prospective cohort study was conducted on 195 non-dementia older patients, aged 60 years or older, who were hospitalized after non-cardiac surgery and anesthesia. The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was used to evaluate the occurrence of POD. Incidence of POD was reported. We conducted univariate and multivariate logistic regression to identify the risk factors associated with POD. 195 patients were enrolled; 172 completed the study. POD occurred in seven patients within three days after anesthesia, which is a 4.1% incidence of POD. Multivariate logistic analysis showed arrhythmia, coagulopathy, urinary comorbidity, minimum intraoperative heart rate, and minimum post-anesthesia care unit (PACU) pain score as independent risk factors for POD. A minimum PACU pain score > 1 is the optimum cutoff pain score for developing POD, with a sensitivity of 85.7% and a specificity of 69.1%. The postoperative complication rate and in-hospital mortality were significantly higher for patients with POD compared to those without POD. The incidence of POD in the study population is 4.1%. Arrhythmia, coagulopathy, urinary comorbidity, minimum intraoperative heart rate, and minimum PACU pain score were independent risk factors for POD. The minimum PACU pain score is the strongest independent risk factor of POD. POD is associated with increased postoperative complications and in-hospital mortality rates in non-dementia older patients.

A Retrospective Study Establishing a Nomogram Predictive Model for Postoperative High-Activity Delirium After Non-Cardiac Surgery.

Postoperative high-activity delirium (PDHA) manifests as a high alertness, restlessness, hallucinations, and delusions. Occurrence of PDHA represents an increased risk of poor prognosis for patients. To establish and validate a nomogram prediction model for high-activity delirium after non-cardiac surgery in a post-anesthesia care unit (PACU). This study retrospectively enrolled adult patients who underwent non-cardiac surgery and were observed in the PACU as training data. Patients were divided into PDHA (199 patients) and non-PDHA (396 patients) groups. Patients' general data, preoperative indicators, intraoperative conditions, and postoperative PACU conditions were collected. The risk factors for PDHA were identified using univariate and multivariate logistic regression analyses. A predictive column chart was created using R language. Adult patients who underwent non-cardiac surgery and entered the PACU for observation were randomly selected as the validation set data (198 cases) for model performance validation. The incidence rate of adult PDHA in the PACU was 0.275%. Sex, age, smoking history, low preoperative albumin level, Society of Anesthesiologists (ASA) classification, anesthesia duration, and postoperative PACU pain score were independent risk factors for hyperactive delirium in PACU adults. In this study, an adult PACU PDHA nomogram prediction model was developed. The training dataset verified that the ROC curve (area under the curve) and 95% confidence interval (95% CI) were 0.936 (0.917-0.955). The ROC curve of the validation data row showed that the area under the curve and 95% CI were 0.926 (0.885-0.967). The nomogram predictive model for PACU adult high-activity delirium constructed in this study showed good predictive performance. This model could enable the visualization and graphical prediction of adult high-activity delirium occurrence after PACU, which has clinical value.

Optimizing pediatric tonsillectomy outcomes with an opioid sparing anesthesia protocol: Learning and continuously improving with real-world data.

This quality improvement initiative is a continued pursuit to optimize outcomes by iteratively improving our opioid sparing anesthesia protocol for tonsillectomy with or without adenoidectomy at our pediatric ambulatory surgical center through data driven Plan-Do-Study-Act cycles. From 1/2015 through 12/2023, our standardized tonsillectomy protocol underwent nine procedure-specific perioperative Plan-Do-Study-Act cycles, three procedure-specific postoperative prescription Plan-Do-Study-Act cycles, and four general ambulatory surgical center enhanced recovery Plan-Do-Study-Act cycles. We analyzed data from the medical record using statistical process control charts. The primary outcome measure was the percent of patients requiring intravenous opioid in the post anesthesia care unit. Secondary outcomes included maximum post anesthesia care unit pain score, the percent of patients requiring treatment for nausea and/or vomiting in the post anesthesia care unit, and the number of postoperative opioid prescription dosages. Balancing measures were average post anesthesia care unit length of stay, percent of patients with prolonged Post Anesthesia Care Unit length of stay (>120 min), and 30-day reoperation rate. A total of 5654 tonsillectomy with or without adenoidectomy cases were performed at our ambulatory surgical center from 2015 to 2023. The incidence of intravenous opioid administered in the post anesthesia care unit initially rose with opioid free anesthesia launch, but subsequently decreased below the target of 10%. Maximum post anesthesia care unit pain scores rose from mean 3.6 to 4.5, but subsequently returned to the baseline of 3.5, while the incidence of postoperative nausea and/or vomiting improved. The average post anesthesia care unit length of stay increased by 10 min with opioid free anesthesia; however, prolonged post anesthesia care unit stay and 30-day reoperation rates were unchanged. The continued refinement of our opioid sparing anesthesia protocol has led to reduced perioperative and home opioid use, stable maximum post anesthesia care unit pain scores, and improved postoperative nausea and vomiting rates, with only a slight increase in mean post anesthesia care unit length of stay.

Perioperative Buprenorphine Management and Postoperative Pain Outcomes: A Retrospective Study with Evidence-Based Recommendations

The prevalence of patients on buprenorphine therapy presenting for elective surgery has increased. Buprenorphine is a widely used medication for the management of patients with chronic pain. It is also used as maintenance therapy for patients with a history of opioid use disorder (OUD). Due to the lack of a standardized protocol for managing patients on buprenorphine perioperatively, we performed a retrospective analysis to compare pain score outcomes and postoperative opiate requirements between patients who continued buprenorphine versus patients who discontinued buprenorphine. We identified 35 patients: 11 continued buprenorphine and 24 discontinued buprenorphine. The average Post-Anesthesia Care Unit (PACU) pain score was 5.59 for those who continued buprenorphine and 7.54 for those who discontinued preoperative buprenorphine (p value 0.0339). The average postoperative morphine milligram equivalent (MME) use was 86.13 for those who continued preoperative buprenorphine and 107.70 for those who discontinued buprenorphine (p value 0.6439). The results from our study correlate with several previous studies, which showed lower PACU pain scores in patients who continued buprenorphine. There is a benefit of decreased postoperative pain when preoperative buprenorphine is continued, and a decreased possibility for relapse in those with a history of OUD.

Use of regional anesthesia within a pediatric interventional radiology suite reduced periprocedural opioid use without delaying the overall workflow: a retrospective study

BackgroundNerve block utility has been extensively described in the operating room, however, there is a paucity of evidence regarding blocks in the interventional radiology (IR) suite, with no studies examining...

A Mobile Post Anesthesia Care Unit Order Reminder System Improves Timely Order Entry

Transition to the postanesthesia care unit (PACU) requires timely order placement by anesthesia providers. Computerized ordering enables automated order reminder systems, but their value is not fully understood. We performed a single-center, retrospective cohort study to estimate the association between automated PACU order reminders and primary outcomes (1) on-time order placement and (2) the degree of delay in placement. As a secondary post-hoc analysis, we studied the association between late order placement and PACU outcomes. We included patients with a qualifying postprocedure order from January 1, 2019, to May 31, 2023. We excluded cases transferred directly to the ICU, whose anesthesia provider was involved in the pilot testing of the reminder system, or those with missing covariate data. Order reminder system usage was defined by the primary attending anesthesiologist’s receipt of a push notification reminder on the day of surgery. We estimated the association between reminder system usage and timely order placement using a logistic regression. For patients with late orders, we performed a survival analysis of order placement. The significance level was 0.05. Patient (e.g., age, race), procedural (e.g., anesthesia duration), and provider-based (e.g., ordering privileges) variables were used as covariates within the analyses. Reminders were associated with 51% increased odds of order placement prior to PACU admission (Odds Ratio: 1.51; 95% Confidence Interval: 1.43, 1.58; p ≤ 0.001), reducing the incidence of late PACU orders from 17.5% to 12.6% (p ≤ 0.001). In patients with late orders, the reminders were associated with 10% quicker placement (Hazard Ratio: 1.10; 95% CI 1.05, 1.15; p < 0.001). On-time order placement was associated with decreased PACU duration (p < 0.001), decreased odds of peak PACU pain score (p < 0.001), and decreased odds of multiple administration of antiemetics (p = 0.02). An order reminder system was associated with an increase in order placement prior to PACU arrival and a reduction in delay in order placement after arrival.

Is a Failed Spinal Attempt Associated With a Worse Clinical Course Following Primary Total Hip and Knee Arthroplasty?

BackgroundSpinal anesthesia (SA) is the preferred anesthesia modality for total joint arthroplasty (TJA). However, studies establishing SA as preferential may be subject to selection bias given that general anesthesia (GA) is often selectively utilized on more difficult, higher-risk operations. The optimal comparison group, therefore, is the patient converted to GA due to a failed attempt at SA. The purpose of this study was to determine risk factors and outcomes following failed SA with conversion to GA during primary total hip arthroplasty (THA) or total knee arthroplasty (TKA). MethodsA consecutive cohort of 4,483 patients who underwent primary TJA at our institution was identified (2,004 THA and 2,479 TKA). Of these patients, 3,307 underwent GA (73.8%), 1,056 underwent SA (23.3%), and 130 patients failed SA with conversion to GA (2.90%). Primary outcomes included rescue analgesia requirement in the postanesthesia care unit (PACU), time to ambulation, pain scores in the PACU, estimated blood loss, and 90-day complications. ResultsRisk factors for SA failure included older age and a higher comorbidity burden. Failure of SA was associated with increased estimated blood loss, rescue intravenous opioid use, and time to ambulation when compared to the successful SA group in both THA and TKA patients (P < .001). The anesthesia modality was not associated with significant differences in PACU pain scores. The 90-day complication rate was similar between the failed SA and GA groups. There was a higher incidence of postoperative pain prompting unplanned visits and thromboembolism when comparing failed SA to successful SA in both THA and TKA patients (P < .05). ConclusionsIn our series, patients who had failed SA demonstrated inferior outcomes to patients receiving successful SA and similar outcomes to patients receiving GA who did not have an SA attempt. This emphasizes the importance of success in the initial attempt at SA for optimizing outcomes following TJA.

Improving perioperative acetaminophen administration for safer and cost-effective multimodal analgesia in pediatric surgery: A QI initiative.

The use of acetaminophen in the perioperative period has emerged as an attractive option for providing safer and cost-effective analgesia in children. The primary aim of our project was to increase the use of acetaminophen (both oral and intravenous) in the perioperative period from a baseline of 39.5% to 50% for all surgical patients within 24 months. The secondary aim was to increase the use of enteral acetaminophen from 10% to 52.5% during the same period. A multidisciplinary team was formed, and model for improvement was chosen as the QI methodology. The primary measure was the total percentage of surgical patients receiving any form of perioperative acetaminophen, while our secondary measure was the percentage use of oral acetaminophen administration. We also tracked the average maximum PACU (Post Anesthesia Care Unit) pain scores and the percentage of patients receiving IV opioids. Multiple interventions were conducted, including education, increasing the availability of acetaminophen, and optimizing the electronic medical record (EMR). Monthly data was collected using an automated report in the EMR. We successfully achieved our goal, increasing the use of acetaminophen from 39.5% to 70% within four months. Despite some fluctuations, by the end of 24 months, we not only met but surpassed our goal, with 63% of patients receiving perioperative acetaminophen. Similarly, the usage of oral acetaminophen increased from a baseline of 10% to 78%. Our average maximum PACU pain scores improved from 5.4 to 5.2, and the percentage of patients receiving rescue opioids decreased from 15.4 to 13.1. We successfully achieved and sustained our goals of improving acetaminophen use for our surgical patients without worsening pain scores or worsening use of intravenous opioids. Future directions include further refining our strategies and exploring additional opportunities to optimize pain management in pediatric perioperative settings.

Pain Catastrophizing and Impact on Pelvic Floor Surgery Experience

ABSTRACT Duration, intensity, and management of pain and discomfort may all be affected by experience, personality, and medical and psychosocial comorbidities. A negative cognitive-affective response to actual or anticipated pain, which impacts the pain experience, is called pain catastrophizing. The scale utilized for identifying individuals who magnify, feel helpless to manage, anticipate, or ruminate on pain is known as the Pain Catastrophizing Scale (PCS) and is composed of a 13-question validated measure and 3 subscales. The scale's score ranges from 0 to 52, where scores of 30 and greater indicate pain catastrophizing (30 points is the 75th percentile for PCS score distribution in patients with chronic pain). Pain catastrophizing is associated with increased pain severity, pain persistence, and opioid consumption following surgery, as well as poorer response to endometriosis treatments. Approximately 300,000 prolapse surgical procedures are performed in the United States annually, and because little is known about pain catastrophizing on perioperative pain, pelvic floor symptom distress/impact, and voiding trial (VT) performance following urogynecologic surgery, the authors' primary aim was to assess baseline pain catastrophizing on preoperative pelvic floor symptom impact and distress. The secondary aims included assessing the impact of pain catastrophizing on voiding function and postoperative pain following pelvic floor surgery. The patients for this prospective cohort study included self-identifying female patients undergoing surgery for stress urinary incontinence (SUI) and/or pelvic organ prolapse from March 2020 to December 2021. Inclusion came following completion of appropriate surveys and subsequent surgery. Exclusion was merited through surgery for reasons besides SUI or prolapse. At the baseline patient visit, a PCS score of 30 or greater was defined as pain catastrophizing. The initial visit also included recording data such as body mass index, age, benzodiazepine use, chronic opioid use, anxiety and depression diagnoses, postoperative prolapse stage, bothersome urgency urinary incontinence, and preoperative postvoid residual volume. Charts were used for abstracting surgical data, such as operative time, estimated blood loss, type of pelvic reconstructive surgery performed, and midurethral sling placement. Surgeries were all performed by fellowship-trained reconstructive pelvic surgery providers. Postanesthesia care unit (PACU) nurses and clinic staff were masked to preoperative PCS scores obtained in the PACU and postoperative clinic visits. A standardized void trial was performed. Of 320 participants in this cohort, 46 had a pain catastrophizing score of ≥30. Mean age was 60.0 ± 12.8 years. Bivariate analysis indicated that the pain catastrophizing group had higher average body mass index and greater preoperative use of benzodiazepines. Variants such as SUI rates, urgency urinary incontinence, or prolapse stage had no significant differences between groups, yet preoperative pelvic floor symptom distress and impact scores were clinically and statistically significantly higher in the catastrophizing group. Higher PACU pain scores were associated with pain catastrophizing, but not first postoperative VT failure. A significant association between pain catastrophizing and symptom distress remained following multivariable analysis, as well as a relationship between high PCS scores and symptom impact. All quality-of-life subscales maintained the significant associations. This study, although unique in describing pain catastrophizing in this setting, includes various limitations such as its single-institutional nature, which may limit external generalizability. Furthermore, generalizability may also be limited for those electing nonsurgical management, as the study selected for women choosing surgery. Study strengths include its large number of patients cared for by fellowship-trained providers in a similar manner with uniform surgical practice and timing of measures for assessing pelvic pain and pelvic floor symptoms. Also, a relatively standard VT method was utilized. Although further investigation is warranted for describing pain catastrophizing and its role with pelvic floor symptoms and pain postoperatively, the results of this study support other investigative findings, which indicate the importance of understanding pain catastrophizing and its potential effect on patients undergoing pelvic floor surgery. Future studies around this relationship can potentially enable health care providers to tailor perioperative care for individuals with pain catastrophizing.

Postanesthesia Care Unit and Anesthetic Management Outcomes Among Patients Undergoing Noncardiac Surgery: Differences by Race and Ethnicity

To investigate the association of patient race and ethnicity with postanesthesia care unit (PACU) outcomes in common, noncardiac surgeries requiring general anesthesia. Single tertiary care academic medical center retrospective matched cohort. We matched 1:1 1836 adult patients by race and/or ethnicity undergoing common surgeries. We compared racial and ethnic minority populations (62 American Indian, 250 Asian, 315 Black or African American, 281 Hispanic, and 10 Pacific Islander patients) to 918 non-Hispanic White patients. The primary outcomes were: the use of an appropriate number of postoperative nausea and vomiting (PONV) prophylactics; the incidence of PONV; and the use of a propofol infusion as part of the anesthetic (PROP). Secondary outcomes were: the use of opioid-sparing multimodal analgesia, including the use of regional anesthesia for postoperative pain control; the use of any local anesthetic, including the use of liposomal bupivacaine; the duration until readiness for discharge from the PACU; the time between arrival to PACU and first pain score; and the time between the first PACU pain score of ≥4 and administration of an analgesic. Logistic and linear regression were used for relevant outcomes of interest. Overall, there were no differences in the appropriate number of PONV prophylactics, nor the incidence of PONV between the two groups. There was, however, a decreased use of PROP (OR=0.80; 95% CI: 0.69, 0.94; P=.005), PACU length of stay was 9.56minutes longer (95% CI: 2.62, 16.49; P=.007), and time between arrival to PACU and first pain score was 2.30minutes longer in patients from racial and ethnic minority populations (95% CI: 0.99, 3.61; P=.001). There were no statistically significant differences in the other secondary outcomes. The rate of appropriate number of PONV prophylactic medications as well as the incidence of PONV were similar in patients from racial and ethnic minority populations compared to non-Hispanic White patients. However, there was a lower use of PROP in racial and ethnic minority patients. It is important to have a health equity lens to identify differences in management that may contribute to disparities within each phase of perioperative care.

Minimal differences in acute postoperative pain after anterior cruciate ligament reconstruction with quadriceps versus hamstring autograft.

Studies are lacking that evaluate early postoperative pain after all-soft-tissue quadriceps tendon anterior cruciate ligament reconstruction (ACLR), particularly in young patients. The purpose of this study was to investigate differences in early postoperative pain between adolescent patients undergoing ACLR with quadriceps tendon versus hamstring autograft. A retrospective review was performed of 60 patients (mean age, 15.6 ± 1.3 years) who underwent ACLR using either quadriceps tendon ( n = 31) or hamstring ( n = 29) autografts between January 2017 and February 2020. Intraoperative and postoperative milligram morphine equivalents (MMEs), postanesthesia care unit (PACU) length of stay and PACU pain scores were recorded. Pain scores and supplemental oxycodone use were recorded on postoperative days (POD) 1-3. Differences were compared between the two groups. There were no statistically significant differences in age, sex, body mass index or concomitant meniscus repairs between the two groups ( P > 0.05). There were no statistically significant differences in intraoperative MMEs, PACU MMEs or PACU length of stay between groups ( P > 0.05). There were no statistically significant differences in maximum PACU pain scores (3.7 ± 3.0 vs. 3.8 ± 3.2; P = 0.89). Maximum pain scores on POD 1-3 were similar between groups ( P > 0.05). There were no statistically significant differences in supplemental oxycodone doses between groups on POD 1-3 ( P > 0.05). Adolescent patients undergoing ACLR with quadriceps tendon and hamstring autografts have similar pain levels and opioid use in the early postoperative period.

A Comparison of Multimodal Analgesic Regimens for Opioid Reduction in Elective Plastic Surgery: A Randomized Study.

Patients were randomly assigned to a multimodal regimen of postoperative acetaminophen, gabapentin, and oxycodone with an acetaminophen and gabapentin preload or postoperative ibuprofen and oxycodone-acetaminophen protocol without a preload. Data on compliance, number of narcotic pills consumed, duration of analgesic use, pain levels, patient satisfaction, time from incision close to postanesthesia care unit (PACU) admission, and incidence of bleeding-related complications were collected and analyzed. Patients from both regimens reported equivalent postoperative pain control with the exception of pain in PACU. NSAID patients exhibited a 9.3% higher rate of compliance (P = 0.01), a 6.0% higher rate of satisfaction with pain control (P = 0.04), a 25.2% shorter interval between closure and PACU (=0.01), and an 8.2% lower rate of bleeding-related complications, all of which were statistically significant (P < 0.05). Both regimens are viable tools in combating opioid overprescription as they both effectively reduce postoperative pain. However, the NSAID protocol resulted in greater satisfaction related to pain management and was more cost-effective by reducing emergence time from anesthesia. As there were no hematomas associated with the use of NSAIDs and a significantly higher rate of compliance, the use of NSAIDs in enhanced recovery after surgery protocols is supported.

Race, ethnicity and postoperative pain in pediatric cancer patients: a single-institution retrospective study

BackgroundStudies have suggested racial and ethnic-based disparities in the intensity of postoperative pain experienced by patients. The objective of this study was to compare the peak and average post-anesthesia care unit (PACU) pain intensity scores of children of non-Hispanic (NH) White race to those of children of other racial/ethnic groups.MethodsSingle-institution retrospective study of children (≤18 years) who had undergone cancer-related surgical procedures from June 2016 through April 2022. Multivariable logistic regression was used to assess the association between race/ethnicity and the peak and average PACU pain intensity scores.ResultsOf the 1,009 unique patients, 74 (7.3%) were Asian, 93 (9.2%) were NH-Black, 310 (30.7%) were Hispanic/Latino, 51 (5.1%) identified as “Other” race (NH-Other), and 481 (47.7%) were NH-White. The median age [interquartile range (IQR)] was 13.7 years (IQR, 8.2–16.6), and 517 (51.2%) were female.In the multivariable analysis, the association between race/ethnicity and a peak PACU pain score greater than 3 was not significant (p = 0.062 for overall effect of race). However, upon comparing the peak PACU pain scores of children of other racial/ethnic groups to NH-White children, NH-Black children were 50.1% less likely than NH-White children to have a peak PACU pain score greater than 3 (odds ratio [OR], 0.499, 95% confidence interval [CI], 0.304–0.818; p = 0.006). Patient race/ethnicity was not associated with an average PACU pain score greater than 3 (p = 0.778).In the sub-group analysis of children who had undergone orthopedic or open abdominal surgeries, the proportions of children with peak and average PACU pain scores which were greater than 3 were not significantly different across racial/ethnic groups (p = 0.250 and p = 0.661, respectively).ConclusionsIn this retrospective study of children who had undergone cancer-related surgery, NH-Black children had significantly lesser odds than NH-White children of having a peak PACU pain score of moderate or severe intensity. However, in the sub-group analysis of children who had undergone orthopedic or open abdominal procedures, peak and average PACU pain scores were not significantly different across racial/ethnic groups.

Erector Spinae Plane Block With Liposomal Bupivacaine: Analgesic Adjunct in Adult Pectus Surgery

IntroductionPain management may be challenging in patients undergoing pectus excavatum (PE) bar removal surgery. To enhance recovery, opioid sparing strategies with regional anesthesia including ultrasound-guided erector spinae plane block (ESPB) have been implemented. The purpose of this study was to evaluate the safety and efficacy of bilateral ESPB with a liposomal bupivacaine/traditional bupivacaine mixture as part of an enhanced patient recovery pathway. Materials and methodsA retrospective review of adult patients who underwent PE bar removal from January 2019 to December 2020 was performed. Perioperative data were reviewed and recorded. Patients who received ESPB were compared to historical controls (non-ESPB patients). ResultsA total of 202 patients were included (non-ESPB: 124 patients; ESPB: 78 patients). No adverse events were attributed to ESPB. Non-ESPB patients received more intraoperative opioids (milligram morphine equivalents; 41.8 ± 17.0 mg versus 36.7 ± 17.1, P = 0.05) and were more likely to present to the emergency department within 7 d postoperatively (4.8% versus 0%, P = 0.05) when compared to ESPB patients. No significant difference in total perioperative milligram morphine equivalents, severe pain in postanesthesia care unit (PACU), time from PACU arrival to analgesic administration, PACU length of stay, or postprocedure admission rates between groups were observed. ConclusionsIn patients undergoing PE bar removal surgery, bilateral ESPB with liposomal bupivacaine was performed without complications. ESPB with liposomal bupivacaine may be considered as an analgesic adjunct to enhance recovery in patients undergoing cardiothoracic procedures but further prospective randomized clinical trials comparing liposomal bupivacaine to traditional local anesthetics with and without indwelling nerve catheters are necessary.

A Novel Approach to Improving Post-Operative Pain and Minimizing Opioid Consumption After a Hip Arthroscopy.

There have been many different approaches to controlling pain in patients undergoing hip arthroscopy. These include medications, nerve blocks, and intra-articular injections among many others. We introduced a combination of a pre-operative pericapsular nerve group (PENG) block, and intra-operative pericapsular injection of BKK (bupivacaine, ketamine, and ketorolac). Patients undergoing primary hip arthroscopy were identified. There were three patient cohorts based on type of anesthesia: general anesthesia only (GA), general anesthesia and a pericapsular Marcaine injection (GA/Marcaine), or GA with pre-operative PENG block and an intraoperative BKK pericapsular injection (GA+PENG/BKK). Data collected included post-operative pain scores in the PACU (Post-Anesthesia Care Unit), time spent in the PACU, inpatient opioid consumption (both PACU and inpatient), and outpatient opioid prescriptions filled. 20 patients received GA, 11 patients received GA/Marcaine, and 20 patients received GA+PENG/BKK. The GA+PENG/BKK group had average PACU pain score of 3.9 out of 10 compared to 7.7 in the GA group (p<.001) and 6.6 in the GA/Marcaine injection group (p=.048). The GA+PENG/BKK group had shorter mean PACU times than either other group (p<.001). The GA+PENG/BKK also consumed less opioids than the GA or GA/Marcaine groups in the PACU (p<.001), and in the total inpatient stay (p=.002, p=.003), as well as outpatient (p=.019, p=.040). In patients undergoing a hip arthroscopy, performing a pre-operative PENG block and intra-operative BKK pericapsular injection will result in decreased postoperative pain, PACU time, and inpatient and outpatient opioids compared to general anesthesia only and general anesthesia with intracapsular Marcaine.

Perioperative Management and Outcomes in Patients With Autism Spectrum Disorder: A Retrospective Cohort Study.

Autism spectrum disorder (ASD) is a neurocognitive disorder characterized by impairments in communication and socialization. There are little data comparing the differences in perioperative outcomes in children with and without ASD. We hypothesized that children with ASD would have higher postoperative pain scores than those without ASD. Pediatric patients undergoing ambulatory tonsillectomy/adenoidectomy, ophthalmological surgery, general surgery, and urologic procedures between 2016 and 2021 were included in this retrospective cohort study. ASD patients, defined by International Classification of Diseases-9/10 codes, were compared to controls utilizing inverse probability of treatment weighting based on surgical category/duration, age, sex, race and ethnicity, anesthetizing location, American Society of Anesthesiology physical status, intraoperative opioid dose, and intraoperative dexmedetomidine dose. The primary outcome was the maximum postanesthesia care unit (PACU) pain score, and secondary outcomes included premedication administration, behavior at induction, PACU opioid administration, postoperative vomiting, emergence delirium, and PACU length of stay. Three hundred thirty-five children with ASD and 11,551 non-ASD controls were included. Maximum PACU pain scores in the ASD group were not significantly higher than controls (median, 5; interquartile range [IQR], 0-8; ASD versus median, 5; IQR, 0-8 controls; median difference [95% confidence interval {CI}] of 0 [-1.1 to 1.1]; P = .66). There was no significant difference in the use of premedication (96% ASD versus 95% controls; odds ratio [OR], 1.5; [95% CI, 0.9-2.7]; P = .12), but the ASD cohort had significantly higher odds of receiving an intranasal premedication (4.2% ASD versus 1.2% controls; OR, 3.5 [95% CI, 1.8-6.8]; P < .001) and received ketamine significantly more frequently (0.3% ASD versus <0.1% controls; P < .001). Children with ASD were more likely to have parental (4.9% ASD versus 1.0% controls; OR, 5 [95% CI, 2.1-12]; P < .001) and child life specialist (1.3% ASD versus 0.1% controls; OR, 9.9 [95% CI, 2.3-43]; P < .001) presence at induction, but were more likely to have a difficult induction (11% ASD versus 3.4% controls; OR, 3.42 [95% CI, 1.7-6.7]; P < .001). There were no significant differences in postoperative opioid administration, emergence delirium, vomiting, or PACU length of stay between cohorts. We found no difference in maximum PACU pain scores in children with ASD compared to a similarly weighted cohort without ASD. Children with ASD had higher odds of a difficult induction despite similar rates of premedication administration, and significantly higher parental and child life specialist presence at induction. These findings highlight the need for future research to develop evidence-based interventions to optimize the perioperative care of this population.

Effects of Preexisting Anxiety and Depression on Postoperative Outcomes in Patients Aged 30 Years and Younger Following Hip Arthroscopy for Femoroacetabular Impingement Syndrome.

Background: Mental health influences postoperative outcomes in orthopedic procedures. Increasing attention is being paid to this effect. Purpose: We sought to evaluate the effect of diagnosed depression, anxiety, or both on postoperative outcomes in patients who have undergone hip arthroscopy for femoroacetabular impingement syndrome (FAIS). Methods: We conducted a retrospective cohort study of 289 patients aged 30 years or younger who underwent hip arthroscopy for FAIS at a single institution from January 2014 to June 2021. Univariate statistics were used to assess differences between patients diagnosed with depression, anxiety, or both, and those without these diagnoses. Differences included demographics, operative characteristics, and postoperative outcomes: duration of postanesthesia care unit (PACU) stay, PACU pain scores, complications, reoperations, postoperative injections, 90-day emergency department (ED) visits, and patient-reported outcome measures (PROMs). Multivariate analysis was used to evaluate risk factors for postoperative complications, including wound infection, documented reinjury, postoperative intra-articular hip injection, and any reoperation. Results: Patients diagnosed with depression, anxiety, or both were more likely to be older, female, and have a higher comorbidity burden. At the time of surgery, they were more likely to undergo concomitant procedures, including bursectomy and iliotibial band release. Postoperatively, they had longer PACU stays (90.5 vs 75.1 minutes) and higher first PACU pain scores (5.9 vs 4.6), as well as higher rates of postoperative injection (18.1 vs 9.2%), any reoperation (13.9% vs 4.6%), and revision hip arthroscopy (11.1% vs. 3.7%). Diagnoses of depression, anxiety, or both were independently predictive of any reoperation (odds ratio [OR] = 2.841) and revision hip arthroscopy (OR = 3.401). Conclusion: This retrospective cohort study found that, in patients undergoing hip arthroscopy for FAIS, there was an association between a diagnosis of depression, anxiety, or both, and increased comorbidities, higher first PACU pain scores, longer PACU stays, and increased rates of postoperative injection, any reoperation, or revision hip arthroscopy. Targeted interventions may improve outcomes, but further study is warranted.

The safety and efficacy of remimazolam tosylate for induction and maintenance of general anesthesia in pediatric patients undergoing elective surgery: Study protocol for a multicenter, randomized, single-blind, positive-controlled clinical trial.

Introduction: Remimazolam is an ultra-short-acting benzodiazepine sedative agent commonly used in general anesthesia, procedural sedation, and intensive care unit (ICU) sedation. This study aimed to explore the efficacy and safety of remimazolam versus propofol for the induction and maintenance of general anesthesia in preschool-age children undergoing elective surgery. Methods and analysis: In this multicenter, randomized, single-blind, positive-controlled non-inferior clinical trial, one hundred ninety-two children aged 3-6years will be randomly allocated as a 3:1 ratio into two groups: Group R with an intravenous dose of remimazolam 0.3mg/kg for the induction of anesthesia followed by a constant infusion rate of remimazolam 1-3mg/kg/h to maintain anesthesia, and Group P with an intravenous dose of propofol 2.5mg/kg for the induction of anesthesia followed by a constant infusion rate of propofol 4-12mg/kg/h to maintain anesthesia. The primary outcome will be the rate of the successful induction and maintenance of anesthesia. The secondary outcomes will include the time to LoC, the Bispectral Index (BIS) value, awakening time, extubation time, post-anesthesia care unit (PACU) discharge time, usage of additional sedative drugs during the induction period, usage of remedial drugs in PACU, emergence delirium, pain in PACU, behavior scores at day 3 after surgery, parental and anesthesiologists' satisfaction, and adverse events. Ethics and dissemination: This study has been approved by the ethics review boards at all participating hospitals. The Ethics Committee of the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University (Reference No. LCKY 2020-380, November 13, 2020) is the central ethics committee.

Intraoperative use of the machine learning-derived nociception level monitor results in less pain in the first 90 min after surgery.

In this pooled analysis of two randomized clinical trials, intraoperative opioid dosing based on the nociception level-index produced less pain compared to standard care with a difference in pain scores in the post-anesthesia care unit of 1.5 (95% CI 0.8-2.2) points on an 11-point scale. The proportion of patients with severe pain was lower by 70%. Severe postoperative pain remains a significant problem and associates with several adverse outcomes. Here, we determined whether the application of a monitor that detects intraoperative nociceptive events, based on machine learning technology, and treatment of such events reduces pain scores in the post-anesthesia care unit (PACU). To that end, we performed a pooled analysis of two trials in adult patients, undergoing elective major abdominal surgery, on the effect of intraoperative nociception level monitor (NOL)-guided fentanyl dosing on PACU pain was performed. Patients received NOL-guided fentanyl dosing or standard care (fentanyl dosing based on hemodynamic parameters). Goal of the intervention was to keep NOL at values that indicated absence of nociception. The primary endpoint of the study was the median pain score obtained in the first 90 min in the PACU. Pain scores were collected at 15 min intervals on an 11-point Likert scale. Data from 125 patients (55 men, 70 women, age range 21-86 years) were analyzed. Sixty-one patients received NOL-guided fentanyl dosing and 64 standard care. Median PACU pain score was 1.5 points (0.8-2.2) lower in the NOL group compared to the standard care; the proportion of patients with severe pain was 70% lower in the NOL group (p = 0.045). The only significant factor associated with increased odds for severe pain was the standard of care compared to NOL treatment (OR 6.0, 95% CI 1.4 -25.9, p = 0.017). The use of a machine learning-based technology to guide opioid dosing during major abdominal surgery resulted in reduced PACU pain scores with less patients in severe pain.

Perioperative Outcomes in Patients Who Received Spinal Chloroprocaine for Total Hip or Knee Arthroplasty-Consecutive Case Series Study.

Spinal anaesthesia is an established component of perioperative management for fast-track lower limbs arthroplasty. Short-acting local anaesthetics may present an interesting option for primary non-complicated knee (TKA) and hip (THA) arthroplasty. We describe the perioperative outcomes in patients operated under fixed 50 mg spinal chloroprocaine for total hip and knee replacement. In this retrospective case series study, 65 patients were analysed (median age 65 years, 55% females, benefit from THA (n = 31), TKA (n = 25), and unicompartmental knee arthroplasty (n = 9)). In all cases, anaesthesia duration (87 min) was sufficient for successful surgery (52 min). Up to 45% of patients (THA and less in TKA) developed postoperative pain in the post-anaesthesia care unit (PACU), requiring intravenous morphine titration (up to 7.5 mg). One patient developed severe breakthrough pain requiring advanced regional analgesia. The median PACU stay was up to 97 min (less in TKA), and the incidence of nausea and urinary retention was low. All patients were able to start physical therapy on the same day of surgery. These findings encourage the use of a short-acting agent for spinal anaesthesia in patients with primary non-complicated arthroplasty; however, the relay analgesia should be systematically implemented to avoid breakthrough pain in PACU.