Nerve Cryoablation Research Articles

Improvement in Nasal Symptoms of Chronic Rhinitis after Cryoablation of the Posterior Nasal Nerve.

To determine the efficacy of posterior nasal nerve (PNN) cryoablation for improving the symptoms of chronic rhinitis. Retrospective cohort study. A private practice. This study evaluated medication usage and adverse effects of in-office PNN cryoablation with a handheld device in patients > 18 years with chronic (>6 months) allergic or nonallergic rhinitis for whom medical management failed. The total nasal symptom score (TNSS) and mini rhinoconjunctivitis quality of life questionnaire (mRQLQ) scores were compared before and after treatment. This study included 127 patients with a mean age of 52.4 ± 16.9 years; 60.6% of patients were female and 49.6% had allergic rhinitis. Mean symptom scores decreased from 5.94 (95% confidence interval [CI], 5.51-6.43) to 3.44 (95% CI, 2.97-3.81, P < .001) after the procedure, with clinically important decreases in 75 (59.1%) patients. For patients with baseline TNSS values of ≥4, 63.5% (66/104) had a clinically important decrease, whereas only 39.1% (9/23) of those with the lower baseline did (P = .04). Mean mRQLQ scores also decreased from 2.51 (95% CI, 2.29-2.72) to 1.28 (95% CI, 1.20-1.47, P < .001) after the procedure. Seventy-eight of 273 (28.6%) medications were discontinued after the procedure. Adverse effects occurred in 18.1% (23/127) of patients with headache as the most common. PNNcryoablation improves nasal symptoms and quality of life in patients with chronic rhinitis. Patients with a higher baseline TNSS are more likely to experience significant symptomatic improvement.

Intercostal nerve cryoablation therapy for the repair of pectus excavatum: a systematic review.

The minimally invasive repair of pectus excavatum (PE) is a painful procedure that can result in long-term hospitalization and opioid use. To mitigate the length of stay and opioid consumption, many different analgesia strategies have been implemented. The aim of this study is to review the use and patient outcomes of intercostal nerve cryoablation (INC) during PE repair reported in the literature. An unfunded literature search using PubMed identifying articles discussing INC during PE repair from 1946 to 1 July 2023 was performed. Articles were included if they discussed patient outcomes with INC use during PE repair. Articles were excluded if they were reviews/meta-analyses, editorials, or not available in English. Each article was reviewed for bias by analyzing the study methods, data analysis, patient selection, and patient follow-up. Articles comparing outcomes of INC were considered significant if p-value was <0.05. A total of 34 articles were included in this review that described INC use during pectus repair. Most supported a decreased hospital length of stay and opioid use with INC. Overall, INC was associated with fewer short-term and long-term complications. However, the researchers reported varied results of total hospital costs with the use of INC. The review was limited by a paucity of prospective studies and low number of patients who received INC. Despite this, the present data support INC as a safe and effective analgesic strategy during the repair of PE.

Evaluation of Analgesic Practice Changes Following the Nuss Procedure in Pediatric Patients

IntroductionPectus excavatum repair by the Nuss procedure results in severe postoperative pain. Regional blocks and intercostal nerve cryoablation (INC) have emerged as potential strategies to manage analgesia. This study compares pain-related outcomes following these perioperative interventions. MethodsWe reviewed charts of patients <18 y who underwent the Nuss procedure at Duke Children's Hospital from July 2018 to June 2022. Patients were divided into three groups by analgesic strategy: no block, regional catheters, or INC, representing the chronologic change in our practice. The primary outcome was total and daily in-hospital opioid utilization measured by oral morphine equivalents (OMEs). Secondary outcomes included average daily pain scores, length of stay, opioid refills after discharge, and complications. ResultsTwenty-one patients were included and analyzed: no block (n = 6), regional catheters (n = 7), and INC (n = 8). INC-treated patients required significantly lower total postoperative, in-hospital OMEs (64 ± 47 [mean ± standard deviation]) than those with no block (270 ± 217, P = 0.04) or those with regional catheters (273 ± 176, P = 0.03). INC was associated with longer average operative times (161 ± 36 min) than no block (105 ± 21 min, P = 0.005) or regional catheters (90 ± 11 min, P < 0.001). INC-treated patients had shorter hospital length of stays (median 68 h) than those with regional catheters (median 74 h, P = 0.006). ConclusionsINC was associated with longer operative times but decreased in-hospital OMEs when compared to bilateral regional block catheters and multimodal analgesia alone.

Intercostal Nerve Cryoablation for Postoperative Pain Control in Pediatric Thoracic Surgery: A Scoping Review.

Background: Cryoanalgesia uses the application of cold temperatures to temporarily disrupt peripheral sensory nerve function for pain control. This review outlines the principles of cryoablation, clinical applications, and clinical data for its use in pediatric thoracic surgery. Methods: A comprehensive PubMed search was performed using the principal terms and combinations of cryoablation, cryoanalgesia, Nuss, Nuss repair, pectus, pectus excavatum, thoracic surgery, thoracotomy, and chest wall. Pediatric articles were reviewed and included if relevant. Adult articles were reviewed for supporting information as needed. Reference lists of included articles were reviewed for possible additional sources. Discussion: The scientific and clinical principles of cryoablation are outlined, followed by a focused review of current clinical application and outcome data. Conclusion: Postoperative pain is a major challenge following thoracic surgery. Cryoanalgesia is emerging as an adjunct in pediatric thoracic surgery, particularly for the Nuss procedure or minimally invasive repair of pectus excavatum. It effectively controls pain, decreasing postoperative opioid use and hospital length of stay with few short-term complications. Although more long-term studies are needed, early evidence suggests there is reliable return of sensation to the chest wall and long-term neuropathic pain is rare.

Combined erector spinae plane block with surgical intercostal nerve cryoablation for Nuss procedure is associated with decreased opioid use and length of stay

Background and objectivesPain management for patients undergoing the Nuss procedure for treatment of pectus excavatum can be challenging. In an effort to improve pain management, our institution added bilateral single...

Intercostal Cryoablation During Video-Assisted Lung Resection Can Decrease Postoperative Opioid Use.

Pain requiring opioid use remains an issue even with minimally invasive thoracic surgery. The objective of this study was to investigate the effectiveness of intercostal nerve cryoablation (CRYO) for pain control in adult patients undergoing pulmonary resection. A retrospective analysis of patients undergoing pulmonary resection by uniportal video-assisted thoracic (uVATS) approach was undertaken. Patients treated with our usual pain regimen (STANDARD) were compared with those who additionally received CRYO. STANDARD includes intercostal bupivacaine, patient-controlled analgesia (24 h), ketorolac (48 to 72 h), and tramadol. Intraoperative CRYO was performed on 5 intercostal levels. The primary aim was to compare pain scores (range, 0 to 10) and morphine equivalent dosages (MED). Secondary outcomes included length of stay, chest tube duration, presence of an air leak, and adverse events. A p value <0.05 was considered significant. There were 49 patients (34 female, 15 male). The median age was 74 (37 to 90) years. Procedures included lobectomy (n = 32), segmentectomy (n = 7), and wedge resections (n = 10). There were 23 (46.9%) CRYO and 26 (53.1%) STANDARD patients. Baseline characteristics were similar. Mean length of stay (2.9 vs 3.5 days), chest tube duration (2.2 vs 1.8 days), and adverse events (9 of 23 vs 7 of 26) were similar. There were no complications attributable to CRYO. Pain scores were not significantly different on postoperative days (POD) 1 to 4. MED was significantly reduced after CRYO on POD 1 (5 vs 47.24), POD 2 (10.93 vs 25.04), POD 3 (8.13 vs 21.7), and POD 4 (7.08 vs 19.17). CRYO can be performed safely during pulmonary resection and can decrease in-hospital opioid use. The results from this retrospective study will need to be validated in future prospective studies.

Evolution of Pain Control for Adult Pectus Excavatum Repair

BackgroundPain control after minimally invasive repair of pectus excavatum (MIRPE) can be challenging, especially in adult patients undergoing surgical repair. This study reviewed different analgesic modalities used over ≥10 years after pectus repair. MethodsA retrospective analysis was performed of adult patients (≥18 years) who underwent uncomplicated primary MIRPE at a single institution from October 2010 to December 2021. Patients were classified by analgesic modality used: epidural, elastomeric continuous infusion subcutaneous catheters (SC-Caths), and intercostal nerve cryoablation. Comparisons among the 3 groups were performed. ResultsIn total, 729 patients were included (mean age, 30.9 ±10.3 years; 67% male; mean Haller index, 4.9 ±3.0). Patients in the cryoablation group required significantly lower doses of morphine equivalents (P < .001) and had overall the shortest hospital stay (mean, 1.9 ±1.5 days; P < .001) with <17% staying >2 days (vs epidural at 94% and SC-Cath at 48%; P < .001). The cryoablation group had a lower incidence of ileus and constipation (P < .001) but a higher incidence of pleural effusion requiring thoracentesis (P = .024). Mean pain scores among groups were minor (<3), and differences were insignificant. ConclusionsThe use of cryoablation in conjunction with enhanced recovery pathways provided significant benefit to our patients undergoing MIRPE compared with previous analgesic modalities. These benefits included a decrease in length of hospital stay, a reduction of in-hospital opioid use, and a lower incidence of opioid-related complications associated with constipation and ileus. Further studies to assess additional potential benefits with long-term follow-up after discharge are warranted.

ID: 204376 Pectus Excavatum Intercostal Neuralgia Relief With Peripheral Nerve Stimulation

Pectus excavatum, the posterior displacement of the sternum and adjoining ribs into the thoracic cavity, is the most common anterior chest wall deformation (1). Its incidence has been estimated to occur in 1 in 40 to 1 in 400 births (1). Moderate to severe cases of pectus excavatum are often associated with chronic sternal and chest wall pain, dyspnea, restrictive lung disease, and cardiovascular compression (2). In recent years, intercostal nerve cryoablation during surgical correction of pectus excavatum via the Nuss procedure has been associated with a shorter hospital length of stay, decreased opioid usage, and longer duration of chest numbness particularly in adults (3). Intercostal neuralgia is commonly treated with oral medications and single shot injections; however, pain relief can be unsatisfactory or short-lived in refractory cases. Despite the development of neuromodulation in treatment of various pain syndromes, there are only scant case reports on using spinal cord stimulation and no study on using peripheral nerve stimulation to treat intercostal neuralgia from pectus excavatum. In this case report, we describe a 69-year-old woman with a history of chronic chest wall pain secondary to pectus excavatum who found pain relief with peripheral nerve stimulation at the T4 nerve root bilaterally after minimal pain relief with physical therapy, multiple neuropathic agents, and chronic opioids.

Intercostal nerve cryoablation during surgical stabilization of rib fractures decreases post-operative opioid use, ventilation days, and intensive care days

BackgroundIntercostal nerve cryoablation is an adjunctive measure that has demonstrated pain control, decrease in opioid consumption, and decrease in hospital length of stay (LOS) in patients who undergo surgical stabilization of rib fractures (SSRF). MethodsSSRF patients from January 2015 to September 2021 were retrospectively compared. All patients received multimodal pain regimens post-operatively and the independent variable was intraoperative cryoablation. Results241 patients met inclusion criteria. 51 (21%) underwent intra-operative cryoablation during SSRF and 191 (79%) did not. Patients with standard treatment consumed 9.4 more daily MME (p = 0.035), consumed 73 percent more post-operative total MME (p = 0.001), spent 1.55 times as many days in the intensive care unit (p = 0.013), and spent 3.8 times as many days on the ventilator than patients treated with cryoablation, respectively. Overall hospital LOS, operative case time, pulmonary complications, MME at discharge, and numeric pain scores at discharge were no different (all p>0.05). ConclusionIntercostal nerve cryoablation during SSRF is associated with fewer ventilator days, ICU LOS, total post-operative, and daily opioid use without increasing time in the operating room or perioperative pulmonary complications.

Anterior Spinal Artery Syndrome following Splanchnic Nerve Cryoablation for Oncological Pain: A Case Report

BACKGROUND: Anterior spinal artery syndrome is a diagnosis associated with high morbidity, mortality, and long-term disability. It is a known complication following conventional celiac plexus and splanchnic nerve blocks. The popularity of minimally invasive pain procedures is growing, especially in the domain of oncology, and the interventions are being performed by specialists with varying backgrounds. Complications such as anterior spinal artery syndrome need to be at the forefront of specialists’ minds whenever there is manipulation of the celiac plexus or splanchnic nerves. These structures play an integral role in maintaining circulatory perfusion. The earlier hypoperfusion is suspected or confirmed, the better the prognosis, as steps can be taken to immediately correct this deficit. CASE REPORT: We present a case of a 65-year-old man with a history of poorly differentiated metastatic pancreatic adenocarcinoma who suffered a thoracic anterior spinal artery infarction following a splanchnic nerve cryoablation. Noninvasive methods to control pain prior to the procedure were unsuccessful. Prior to becoming a paraplegic this patient was independent in all activities of daily living and ambulation. CONCLUSIONS: This case report aims to prove the importance of being familiar with the early signs associated with spinal cord infarction and the importance of completing a thorough, transparent informed consent process when manipulating the celiac plexus or splanchnic nerves. Cryoablation procedures of such structures remain relatively novel compared to conventional blocks. Few case reports have documented anterior spinal artery syndrome following cryoablation. This unfortunate complication results in permanent, life-altering damage. We also propose steps that can be taken to minimize this risk. KEY WORDS: Splanchnic nerve cryoablation, anterior spinal artery syndrome, pancreatic adenocarcinoma

A pilot study of multi-modal pain management for same-day discharge after minimally invasive repair of pectus excavatum (Nuss procedure) in children

BackgroundDespite advancements in minimally invasive repair of pectus excavatum (MIRPE), Nuss procedure, postoperative pain control remains challenging. This report covers a multimodal regimen using bilateral single-shot paravertebral block (PVB) and bilateral thoracoscopic intercostal nerve (T3–T7) cryoablation, leading to significant reduction in length of stay (LOS) and high rate of same-day discharge.Methods This is a comparative study of pain management protocols for patients undergoing the Nuss procedure at a single center from 2016 through 2020. All patients underwent the the same surgical technique for the treatment of pectus excavatum at a single center. Patients received bilateral PVB with continuous infusion (Group 1, n = 12), bilateral PVB with infusion and right-side cryoablation (Group 2, n = 9), or bilateral single-shot PVB and bilateral cryoablation (Group 3, n = 17). The primary outcome was LOS with focus on same-day discharge, and the secondary outcome was decreased opioid usage.ResultsEleven of 17 patients in Group 3 (65%) (bilateral single-shot PVB and bilateral cryoablation) were discharged the same day as surgery. The remaining Group 3 patients were discharged the following day with no complications or interventions. Compared to Group 1 (no cryoablation), Group 3 had shorter LOS (median 4.4 days vs. 0.7 days, respectively, p < 0.001) and significantly decreased median opioid use on the day of surgery (0.92 mg/kg vs. 0.47 mg/kg, p = 0.006).Conclusion Findings demonstrate the feasibility of multimodal pain management for same-day discharge after the Nuss procedure. Future multisite studies are needed to investigate the superiority of this approach to established methods.Level of EvidenceIII.

Implementation of a Cryoablation-based Pain Management Protocol for Pectus Excavatum

IntroductionThe Nuss repair for pectus excavatum is associated with significant postoperative pain. Our institution developed protocols to standardize pain management for pectus excavatum patients in the immediate postoperative period. We present our experience with protocol implementation and patient outcomes. MethodsWe standardized regional anesthesia with a 0.25% bupivacaine incisional soaker catheter (post-implementation 1, PI1) before transitioning to intercostal nerve cryoablation (INC) (post-implementation 2, PI2). Patient outcomes were tracked using statistical process control charts in AdaptX™ OR Advisor and run charts in Tableau. Chi-squared tests assessed demographic differences between cohorts. Results244 patients were included: 78 pre-implementation, 108 PI1, and 58 PI2. Average age was 15.9–16.5 years. Patients were majority male, non-Hispanic white, and English speaking. Hospital length of stay decreased 4.1–2.4 days. INC increased surgery time (99–125 min) but decreased PACU time (112-78 min). Maximum pain scores improved in PACU (7.7–6.0) and 0–24 h postoperatively (8.3–6.8) but were not different 24–48 h postoperatively (5.4–5.8). Average opioid dosing decreased 0–48 h from 1.9 to 0.8 mg/kg morphine milliequivalents and was associated with reduction in post-operative nausea and constipation. There were no 30-day readmissions. ConclusionAn institution-wide pain management protocol using INC for pectus excavatum patients was implemented. Intercostal nerve cryoablation was found to be superior to bupivacaine incisional soaker catheters and reduced hospital length of stay, immediate postoperative pain scores, morphine milliequivalent opioid dosing, postoperative nausea, and constipation. Level of EvidenceLevel IV.

Development of a five point enhanced recovery protocol for pectus excavatum surgery

PurposeWe implemented and evaluated an Enhanced Recovery after Surgery (ERAS) protocol for Nuss procedures consisting of patient education, bowel management, pre/post-operative transitional pain service involvement, serratus anterior plane blocks and intercostal nerve cryoablation. MethodsA 5-point ERAS protocol was implemented using multiple plan-do-study-act (PDSA) cycles. Data was collected prospectively for patients in the full ERAS protocol and retrospectively for previous patients. The primary outcome was length of stay (LOS). Secondary outcomes were opioid consumption, pain scores, protocol compliance and patient satisfaction. The impact of PDSA cycles and the ERAS protocol was quantified using statistical process control charts and Mann Whitney U test. ResultsA total of 53 patients were identified, 13 within the ERAS protocol and 40 prior to introduction. There was no difference in age, sex, or Haller index between the two cohorts. The median LOS was decreased by 3 days in the ERAS cohort (P = 0.00001). There was decreased opioid consumption on post-operative day 1 (1.47 vs 1.96 MME/kg, p = 0.009) and overall (3.12 vs 6.35 MME/kg, p = 0.0042) in the ERAS cohort. Median pain scores did not differ between cohorts. ERAS bundle element compliance was: education 92%, bowel management 100%, transitional pain involvement 100%, serratus block 100% and cryoablation 100%. The 1-month survey revealed that 92% of patients were satisfied with their experience. ConclusionOur results demonstrate significant reduction in LOS and a trend to decreasing opioid consumption in hospital following ERAS protocol implementation and support the further application of ERAS protocols in pediatrics. Level of evidence:III – Retrospective comparative study.

Initial Outcomes Using Cryoablation in Surgical Management of Slipping Rib Syndrome

IntroductionMinimally invasive repair of pectus excavatum (MIRPE) and cartilaginous rib excision (CRE) for slipping rib syndrome (SRS) are painful procedures. Intercostal nerve cryoablation (Cryo) controls pain and decreases opioid use in MIRPE. Herein, we describe our experience with cryoablation in CRE. MethodsA retrospective chart review was performed of all patients undergoing CRE between 2018 and 2022. Data on demographics, clinical characteristics, operative details, and hospital course were collected. ResultsA total of 98 patients underwent CRE: 68 CRE without cryo, 22 CRE + Cryo, and 8 combined MIRPE + CRE + Cryo. Ninety percent of patients underwent bioabsorbable rib plating. Patients were predominantly female (79%, 73%, 50% respectively) with median ages 17.6, 16.9, and 14.2 years respectively. CRE + Cryo patients used significantly less opioids in hospital (0.6 OME/kg [0.1,1.2]) compared to CRE without cryo (1.0 OME/kg [0.6,2.1]), p < 0.05. The median length of stay (LOS) in CRE + Cryo was 1 day [1,2] compared to 2 days in CRE without cryo [1,2], p = 0.09. MIRPE + CRE + Cryo patients used 0.6 OME/kg [0.2,8.0] with a 2 day [1,5.5] LOS. Ninety-one percent of Cryo patients had cryoablation of T9 and/or T10 intercostal nerves, with no documented abdominal wall laxity at median follow-up of 16 days. Cryo was applied extra-thoracically in CRE + cryo without thoracoscopy or lung isolation, while MIRPE + CRE + Cryo used a combination extra-/intra-thoracic cryoablation in with thoracoscopy. ConclusionIntercostal nerve cryoablation reduces opioid use and LOS in patients undergoing cartilaginous rib excision for slipping rib syndrome. Cryotherapy to as low as T10 did not result in abdominal wall laxity and can be applied extra-thoracically without the need for thoracoscopy. Ongoing prospective studies are required to assess the long-term outcomes. Level of evidenceIII.

Cost and outcomes of intercostal nerve cryoablation versus thoracic epidural following the Nuss procedure

Pectus excavatum is the most common congenital chest wall abnormality, with the Nuss procedure being the most commonly performed repair. Pain control is the predominant factor in the postoperative treatment of these patients. This study aims to compare the cost and outcomes of intercostal nerve cryoablation (INC) and thoracic epidural (TE) in patients undergoing the Nuss procedure. A retrospective chart review was conducted at our institution for all patients who underwent the Nuss procedure for pectus excavatum from 2002 to 2020. Patients were stratified by pain management strategy, INC vs. TE. Chi-square and Fisher's exact were used to compare categorical variables. Wilcoxon tests were used to evaluate continuous variables and costs. A total of 158 patients were identified. Of these, 80.4% (N=127) were treated with epidural, while 19.6% (N=31) were treated with intercostal nerve cryoablation. The INC group had lower rates of PCA use (35.5% vs. 93.7%, p<0.001), lower total morphine milligram equivalent requirement (27.0 vs. 290.8, p<0.001), and shorter length of stay (3.2 days vs. 5.3 days, p<0.001) compared to the TE group. INC was also associated with longer operative times (153.0min vs. 89.0min, p<0.001). The total hospitalization cost for the INC group was higher compared to the TE group ($24,742.5 vs $21,621.9, p=0.001). In patients undergoing the Nuss procedure, compared to thoracic epidural, INC was associated with lower opioid use and shorter length of stay but at the cost of longer operative time and increased hospitalization cost. Treatment Study, Level III.

Intercostal Nerve Cryoablation is Associated with Reduced Opioid Use in Pediatric Oncology Patients

IntroductionIntercostal nerve cryoablation reduces postoperative pain in adults undergoing thoracotomy and children undergoing pectus excavatum repair. We hypothesize that cryoablation is associated with decreased post-thoracotomy pain and opioid use in pediatric oncology patients. MethodsA single-center retrospective cohort study was performed for oncology patients who underwent thoracotomy from January 1, 2017 to May 31, 2021. Outcomes included postoperative opioid use measured in morphine milligram equivalents per kilogram (MME/kg), pain scores (scale 0-10), and opioid prescription at discharge. Univariable analysis compared patients who received cryoablation to patients who did not receive cryoablation. Multivariable regression analysis controlling for age and prior thoracotomy evaluated associations between cryoablation and postoperative pain. ResultsOverall, 32 patients (19 males:13 females) underwent thoracotomy with 16 who underwent >1 thoracotomy resulting in 53 thoracotomies included for analysis. Cryoablation was used in 14 of 53 (26.4%) thoracotomies. Throughout the postoperative hospitalization, patients receiving cryoablation during thoracotomy consumed less opioids compared to patients who did not receive cryoablation (median 0.38 MME/kg, interquartile range [IQR] 0.20-1.15 versus median 1.47 MME/kg, IQR 0.71-4.02, P < 0.01). Maximum pain scores were lower in cryoablation patients (median 6, IQR 5-8) than noncryoablation patients (median 8, IQR 6-10), with a significant difference observed on postoperative day 4 (P = 0.01). Cryoablation patients were also less frequently prescribed opioids at discharge (21.4% versus 58.97%, P = 0.02). Multivariable regression demonstrated that cryoablation was associated with 2.59 MME/kg less opioid use (95% confidence interval −4.56 to −0.63) and decreased likelihood of opioid prescription at discharge (adjusted odds ratio 0.14, 95% confidence interval 0.03-0.67). ConclusionsCryoablation is significantly associated with decreased post-thoracotomy pain and opioid use in pediatric cancer patients and should be considered in postoperative pain regimens.

Intercostal Nerve Cryoablation in Minimally Invasive Repair of Pectus Excavatum: Effect on Pulmonary Function.

Introduction: Cryoablation of intercostal nerves is performed for pain control after minimally invasive repair of pectus excavatum (MIRPE). Cryoablation affects both sensory and motor neurons, resulting in temporary anesthesia to the chest wall and loss of intercostal motor function. The study objective is to determine the effect of cryoablation on incentive spirometry (IS) volumes, as a measure of pulmonary function, after MIRPE. Materials and Methods: A single-institution retrospective review of pediatric patients undergoing MIRPE was performed. All patients received a multimodal regimen (MMR) of analgesics postoperatively. Three groups were compared-cryoablation (CRYO), elastomeric pain pump (EPP), and MMR alone. The primary outcomes were postoperative IS volumes and IS volumes as a ratio of preoperative forced vital capacity (FVC). Secondary outcomes included pain scores, opioid use, length of stay (LOS), and infectious complications. Results: MIRPE was performed in 115 patients: 50 CRYO, 50 EPP, and 15 MMR alone. Groups were similar for demographics and pectus excavatum severity. Postoperative spirometry measurements were similar across groups: IS (CRYO 750 mL [500,961] versus EPP 750 mL [590,1019] versus MMR 696 mL [500,1037], P = .77); IS/FVC (CRYO 0.19 [0.14,0.26] versus EPP 0.20 [0.16,0.26] versus MMR 0.16 [0.15,0.24], P = .69). Although pain scores were also similar across groups, CRYO patients used less opioid (P < .05) and had shorter LOS (P < .05). Postoperative pneumonia was rare and similar across groups (P = 1.00). Conclusion: Intercostal nerve cryoablation during MIRPE does not adversely affect postoperative IS volumes or increase pneumonia rate, despite the temporary loss of motor innervation to intercostal muscles. Cryoablation provides effective pain control with less opioid use.

Effectiveness of one minute per level intercostal nerve cryoablation for postoperative analgesia after surgical correction of pectus excavatum

PurposeIntraoperative intercostal nerve cryoablation has emerged as a promising modality for postoperative analgesia following Surgical Correction of Pectus Excavatum (SCOPE). Most centers use two-minute cryoablation per level, although data from histologic and adult studies suggest the effectiveness of one-minute freezes. We aimed to describe our center's experience with one minute per level cryoablation. MethodsA retrospective single institution review of patients undergoing SCOPE was performed to compare patients pre- and post-intercostal nerve cryoablation implementation. Cryoablation was performed as one minute for each of the thoracic intercostal nerves T3-T7. Multivariable regression analyses were conducted to compare the outcomes and cost between pre- and post-implementation groups. ResultsDuring the study period, 198 patients underwent SCOPE with one Nuss bar, receiving either intraoperative intercostal nerve cryoablation (Cryo, n = 100) or preoperative thoracic paravertebral catheters (NoCryo, n = 98). Surgical time was on average 9 min longer for the Cryo group (p<0.01). Median length of stay for the Cryo group was 3 days shorter compared to the NoCryo group (p<0.01). The Cryo group had a 19-fold and 5.6-fold reduction in average inpatient and total postoperative opioid usage, respectively (p<0.01). Total hospital costs were significantly lower in the Cryo group (p<0.01). Overall complication rate was not statistically significant different between the two groups. ConclusionsIntraoperative one minute per level cryoablation is a potent approach to postoperative analgesia for SCOPE patients that led to a shorter hospital length of stay, lower hospital costs, and decreased opioid use compared to conventional analgesia at our institution. Pediatric surgeons performing correction of chest wall deformities should consider offering this technique.

Rib fracture management: A review of surgical stabilization, regional analgesia, and intercostal nerve cryoablation

• Rib fractures (RF) are common and result in significant morbidity and mortality. • Surgical stabilization of rib fractures (SSRF) has shown to improve outcomes. • SSRF indications include flail chest, ≥ 3 severely displaced RF, and the elderly. • New regional analgesia has improved outcomes and decreased narcotic requirements. • Intercostal nerve cryoablation is safe and effective pain reducing adjunct to SSRF. Rib fractures still remain a common problem in blunt thoracic trauma, often resulting significant acute and/or chronic morbidity and mortality. The management of rib fractures has improved over the past two decades, resulting in overall improved patient outcomes. With advances in surgical stabilization of rib fractures (SSRF), improvements in regional analgesia, and the introduction of intercostal nerve cryoablation, patient outcomes from rib fractures have improved significantly over the past several years. This article explores the indications and technique for SSRF as well as discusses additional therapeutic modalities for rib fractures through regional anesthesia and intercostal nerve cryoablation.

Association of Intercostal Nerve Cryoablation During Nuss Procedure With Complications and Costs

BackgroundIntercostal nerve cryoablation with the Nuss procedure has been shown to decrease opioid requirements and hospital length of stay; however, few studies have evaluated the impact on complications and hospital costs. MethodsA retrospective cohort study was performed for all Nuss procedures at our institution from 2016 through 2020. Outcomes were compared across 4 pain modalities: cryoablation with standardized pain regimen (n = 98), patient-controlled analgesia (PCA; n = 96), epidural (n = 36), and PCA with peripheral nerve block (PNB; n = 35). Outcomes collected included length of stay, opioid use, variable direct costs, and postoperative complications. Univariate and multivariate hierarchical regression analysis was used to compare outcomes between the pain modalities. ResultsCryoablation was associated with increased total hospital cost compared with PCA (cryoablation, $11 145; PCA, $8975; P < .01), but not when compared with epidural ($9678) or PCA with PNB ($10 303). The primary driver for increased costs was operating room supplies (PCA, $2741; epidural, $2767; PCA with PNB, $3157; and cryoablation, $5938; P < .01). With multivariate analysis, cryoablation was associated with decreased length of stay (−1.94; 95% CI, −2.30 to −1.57), opioid use during hospitalization (−3.54; 95% CI, −4.81 to −2.28), and urinary retention (0.13; 95% CI, 0.05-0.35). ConclusionsCryoablation significantly reduces opioid requirements and length of stay relative to alternative modalities, but it was associated with an increase in total hospital costs relative to PCA, but not epidural or PCA with PNB. Cryoablation was not associated with allodynia or slipped bars requiring reoperation.