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Zhang Q, Xu J, Huang Q, Gong T, Li J, Cui Y. Risk factors for delayed extubation after pediatric perineal anaplasty in patients less than 1 year of age: a retrospective study. BMC Pediatr 2024; 24:307. [PMID: 38711038 DOI: 10.1186/s12887-024-04781-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 04/22/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Anorectal malformation is a common congenital problem occurring in 1 in 5,000 births and has a spectrum of anatomical presentations, requiring individualized surgical treatments for normal growth. Delayed extubation or reintubation may result in a longer intensive care unit (ICU) stay and hospital stay, increased mortality, prolonged duration of mechanical ventilation, increased tracheostomy rate, and higher hospital costs. Extensive studies have focused on the role of risk factors in early extubation during major infant surgery such as Cardiac surgery, neurosurgery, and liver surgery. However, no study has mentioned the influencing factors of delayed extubation in neonates and infants undergoing angioplasty surgery. MATERIALS AND METHODS We performed a retrospective study of neonates and infants who underwent anorectal malformation surgery between June 2018 and June 2022. The principal goal of this study was to observe the incidence of delayed extubation in pediatric anorectal malformation surgery. The secondary goals were to identify the factors associated with delayed extubation in these infants. RESULTS We collected data describing 123 patients who had anorectal malformations from 2019 to 2022. It shows that 74(60.2%) in the normal intubation group and 49(39.8%) in the longer extubation. In the final model, anesthesia methods were independently associated with delayed extubation (P < 0.05). CONCLUSION We found that the anesthesia method was independently associated with early extubation in neonates and infants who accepted pediatric anorectal malformation surgery.
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Affiliation(s)
- Qianqian Zhang
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China
| | - Jing Xu
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China
| | - Qinghua Huang
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China
| | - Tianqing Gong
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China
| | - Jia Li
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China
| | - Yu Cui
- Department of Anesthesiology, The Affiliated Hospital, School of Medicine, UESTC Chengdu Women's & Children's Central Hospital, Chengdu, 610091, China.
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Wingert TEA, Hekmat D, Ayad I. Regional Anesthesia for Neonates. Neoreviews 2023; 24:e626-e641. [PMID: 37777613 DOI: 10.1542/neo.24-10-e626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/02/2023]
Abstract
Pain management in neonates and infants has many unique and important facets, particularly in former preterm infants. Untreated pain and surgical stress in neonates are associated with myriad negative sequelae, including deleterious inflammatory, autonomic, hormonal, metabolic, and neurologic effects. Meanwhile, opioid side effects are also very impactful and affect multiple systems and pathways, particularly in the neonatal and infant population. Regional anesthesia presents a unique opportunity to provide highly effective analgesia; prevent deleterious signaling cascade pathways within the endocrine, immune, and nervous systems from occurring; and create conditions to facilitate reduced reliance on opioids and other analgesics. In some cases, clinicians can completely avoid general anesthesia and systemic anesthetics. This review will discuss some of the unique aspects of pain management in neonates and infants and provide an overview of the different regional anesthetic options available, namely, spinal anesthesia, epidural anesthesia, and peripheral nerve blocks.
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Affiliation(s)
- Theodora E A Wingert
- Department of Anesthesiology and Perioperative Medicine, University of California at Los Angeles, Los Angeles, CA
| | - Diana Hekmat
- Department of Anesthesiology and Perioperative Medicine, University of California at Los Angeles, Los Angeles, CA
| | - Ihab Ayad
- Department of Anesthesiology and Perioperative Medicine, University of California at Los Angeles, Los Angeles, CA
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Zhang M, Alamaw E, Jampachaisri K, Huss M, Pacharinsak C. Effectiveness of two extended-release buprenorphine formulations during postoperative period in neonatal rats. PLoS One 2022; 17:e0276327. [PMID: 36251720 PMCID: PMC9576048 DOI: 10.1371/journal.pone.0276327] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 10/04/2022] [Indexed: 11/05/2022] Open
Abstract
Information on the effectiveness of a new long-lasting buprenorphine formulation, extended-release buprenorphine, in the neonatal rat is very limited. This study compares whether a high dose of extended-release buprenorphine (XR-Hi) attenuates thermal hypersensitivity for a longer period than a low dose of extended-release buprenorphine (XR-Lo) in a neonatal rat incisional pain model. Two experiments were performed. Experiment one: Male and female postnatal day-5 rat pups (n = 38) were randomly assigned to 1 of 4 treatment groups and received a subcutaneous administration of one of the following: 1) 0.9%NaCl (Saline), 0.1 mL; 2) sustained release buprenorphine (Bup-SR), 1 mg/kg; 3) XR-Lo, 0.65 mg/kg; and 4) XR-Hi, 1.3 mg/kg. Pups were anesthetized with sevoflurane in 100% O2 and a 5 mm long skin incision was made over the left lateral thigh and underlying muscle dissected. The skin was closed with surgical tissue glue. Thermal hypersensitivity testing (using a laser diode) and clinical observations were conducted 1 hour (h) prior to surgery and subsequently after 1, 4, 8, 24, 48, 72 h of treatment. Experiment two: The plasma buprenorphine concentration level was evaluated at 1, 4, 8, 24, 48, 72 h on five-day-old rat pups. Plasma buprenorphine concentration for all treatment groups remained above the clinically effective concentration of 1 ng/mL for at least 4 h in the Bup-SR group, 8 h in XR-Lo and 24 h in XR-Hi group with no abnormal clinical observations. This study demonstrates that XR-Hi did not attenuate postoperative thermal hypersensitivity for a longer period than XR-Lo in 5-day-old rats; XR-Hi attenuated postoperative thermal hypersensitivity for up to 4 h while Bup-SR and XR-Lo for at least 8 h in this model.
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Affiliation(s)
- Mingyun Zhang
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail:
| | - Eden Alamaw
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California, United States of America
| | | | - Monika Huss
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California, United States of America
| | - Cholawat Pacharinsak
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California, United States of America
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Continuous epidural chloroprocaine after abdominal surgery is associated with lower postoperative opioid exposure in NICU infants. J Pediatr Surg 2022; 57:683-689. [PMID: 34154813 DOI: 10.1016/j.jpedsurg.2021.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/27/2021] [Accepted: 05/17/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Epidural anesthesia in infants undergoing open abdominal surgery has the potential to reduce opioid consumption, lower pain scores, and expedite tracheal extubation. We evaluated associations between use of continuous epidural chloroprocaine and improved intra- and post-operative outcomes. METHODS This matched retrospective cohort study first identified 24 patients who between April 2018 through December 2019 were treated with a caudal catheter and epidural chloroprocaine infusion for a laparotomy at postnatal age of 6 months or less. A matched comparator group of 24 patients was derived based on age and type of surgery. Exclusion criteria were the presence of a preoperative opioid infusion, comorbidities that would preclude appropriate pain assessment, or a recent surgical procedure. Primary outcomes included opioid consumption and pain scores; we secondarily analyzed intraoperative anesthetic requirements, other systemic analgesic use, vital signs, tracheal extubation time, and procedural times. RESULTS Treatment with epidural anesthesia was associated with lower 5-day total postoperative opioid consumption (3.2 mg/kg vs. 19.7 mg/kg in the respective epidural vs. systemic groups, p = 0.001) and time to tracheal extubation (1.3 days vs. 3.2 days, p = 0.005). Any statistically significant differences in pain scores were not clinically meaningful. There were no differences in mean arterial pressure or intraoperative inhaled anesthetic doses. CONCLUSION Continuous infusion of epidural chloroprocaine in infants following open abdominal surgery may limit exposure to systemic opioid medications while providing adequate postoperative analgesia and shortening time to tracheal extubation.
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Puthoff TD, Veneziano G, Kulaylat AN, Seabrook RB, Diefenbach KA, Ryshen G, Hastie S, Lane A, Renner L, Bapat R. Development of a Structured Regional Analgesia Program for Postoperative Pain Management. Pediatrics 2021; 147:peds.2020-0138. [PMID: 33602800 DOI: 10.1542/peds.2020-0138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/02/2020] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES We pursued the use of regional analgesia (RA) to minimize the use of postoperative opioids. Our aim was to increase the use of postoperative RA for eligible surgical procedures in the NICU from 0% to 80% by June 30, 2019. METHODS A multidisciplinary team determined the eligibility criteria, developed an extensive process map, implemented comprehensive education, and a structured process for communication of postoperative pain management plans. Daily pain team rounds provided an opportunity for collaborative comanagement. An additional 30 minutes for catheter placement was added in operating room (OR) scheduling so that it would not affect the surgeon OR time. RESULTS There were 21 eligible surgeries in the baseline period and 34 in the intervention period. In total, 30 of 34 infants in eligible surgeries (88%) received RA. The average total opioid exposure in intravenous morphine milligram equivalents decreased from 5.0 to 1.1 mg/kg in the intervention group. The average time to extubation was 45 hours in the baseline period and 19.9 hours in the intervention group. After interventions, 75% of infants were extubated in the OR, as compared with 10.5% in the baseline period. No difference was seen in postoperative pain scores or postoperative hypothermia between the baseline and intervention groups. CONCLUSIONS We used quality improvement methodology to develop a structured RA program. We demonstrated a significant reduction in opioid requirements and need for mechanical ventilation postoperatively for those infants who received RA. Our findings support safe and effective use of RA, and provide a framework for implementation of a similar program.
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Affiliation(s)
| | - Giorgio Veneziano
- Nationwide Children's Hospital, Columbus, Ohio; and.,The Ohio State University, Columbus, Ohio
| | | | - Ruth B Seabrook
- Nationwide Children's Hospital, Columbus, Ohio; and.,The Ohio State University, Columbus, Ohio
| | - Karen A Diefenbach
- Nationwide Children's Hospital, Columbus, Ohio; and.,The Ohio State University, Columbus, Ohio
| | - Greg Ryshen
- Nationwide Children's Hospital, Columbus, Ohio; and
| | - Sarah Hastie
- Nationwide Children's Hospital, Columbus, Ohio; and
| | - Autumn Lane
- Nationwide Children's Hospital, Columbus, Ohio; and
| | | | - Roopali Bapat
- Nationwide Children's Hospital, Columbus, Ohio; and .,The Ohio State University, Columbus, Ohio
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6
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Rabie A, Ghoneim T. Ultrasound guided continuous caudal epidural analgesia in neonates undergoing thoracotomy. EGYPTIAN JOURNAL OF ANAESTHESIA 2021. [DOI: 10.1080/11101849.2021.1914961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Aliaa Rabie
- Lecturer of Anesthesia and Surgical Intensive Care, Alexandria Faculty of Medicine, Alexandria, Egypt
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Gannam‐Somri L, Matter I, Hadjittofi C, Vaida S, Khalaily H, Hossein J, Somri M. Combined epidural-general anaesthesia vs general anaesthesia in neonatal gastrointestinal surgery: A randomized controlled trial. Acta Anaesthesiol Scand 2020; 64:34-40. [PMID: 31506919 DOI: 10.1111/aas.13469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/26/2019] [Accepted: 09/01/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Post-operative ileus is a frequent complication of gastrointestinal surgery under general anaesthesia. The aim of this study was to investigate whether combined epidural-general anaesthesia is associated with expedited gastrointestinal function recovery in neonates undergoing elective gastrointestinal surgery. METHODS A randomized controlled trial including 60 neonates who underwent gastrointestinal surgery at a university hospital was performed. Thirty neonates received combined epidural-general anaesthesia (CEGA), and 30 neonates received general anaesthesia (GA) alone. The primary outcome was the post-operative time to tolerance of full enteral nutrition. The secondary outcomes were the post-operative time defaecation, the duration of nasogastric drainage, and infections. RESULTS After excluding two neonates from the CEGA group, where repeated attempts at epidural catheterization were unsuccessful, a total of 58 patients completed the study (CEGA: 28; GA: 30). Full enteral nutrition was tolerated earlier in CEGA vs the GA group (4.0 vs 8.0 days; P = .0001). Time to defaecation was shorter in the CEGA group (3.5 vs 5.0 days; P = .0001). Duration of nasogastric drainage was similar between groups (7.0 vs 7.0 days; P = .9502). Fewer patients in the CEGA group experienced post-operative infection (35.7% vs 60.0%; P = .038). CONCLUSION Combined epidural-general anaesthesia is associated with expedited gastrointestinal function recovery and a lower infection risk after gastrointestinal surgery in neonates.
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Affiliation(s)
- Lina Gannam‐Somri
- The Ruth and Bruce Rappaport Faculty of Medicine Technion—Israel Institute of Technology Haifa Israel
| | - Ibrahim Matter
- The Ruth and Bruce Rappaport Faculty of Medicine Technion—Israel Institute of Technology Haifa Israel
- Department of Surgery Bnei Zion Medical Center Haifa Israel
| | | | - Sonia Vaida
- Obstetric Anesthesia Department of Anesthesiology Penn State College of Medicine Penn State Milton S. Hershey Medical Center Hershey USA
| | - Husein Khalaily
- Department of Anaesthesia Bnei Zion Medical Center Haifa Israel
| | - Jalaa Hossein
- Department of Anaesthesia Bnei Zion Medical Center Haifa Israel
| | - Mostafa Somri
- The Ruth and Bruce Rappaport Faculty of Medicine Technion—Israel Institute of Technology Haifa Israel
- Department of Anaesthesia Bnei Zion Medical Center Haifa Israel
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8
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Abstract
Regional anesthesia provides effective anesthesia and pain relief in infants with age-specific data attesting to safety and efficacy. Regional anesthesia decreases exposure to opioids and general anesthetic agents and associated adverse drug effects, suppresses the stress response, and provides better hemodynamic stability compared to general anesthesia. Regional anesthesia can prevent long-term behavioral responses to pain. As a result, the overall number and variety of nerve blocks being used in infants is increasing. While neuraxial blocks are the most common blocks performed in infants, the introduction of ultrasound imaging and a better safety profile has advanced the use of peripheral nerve blocks. Infant-specific pharmacokinetic and pharmacodynamic data of local anesthetic medications are reviewed including risk factors for the accumulation of high serum levels of unbound, pharmacologically active drug. Bupivacaine accumulates with continuous infusion and 2-chloroprocaine can be used as an alternative. Local anesthetic systemic toxicity has the highest incidence in infants less than 6 months of age and is associated with bolus dosing and penile nerve blocks. Local anesthetic toxicity is treated by securing the airway, suppression of seizure activity and implementation of cardiopulmonary resuscitation. Administration of intralipid (intravenous lipid emulsion) is initiated at the first sign of toxicity. A high level of expertise in regional anesthesia is needed when treating infants due to their unique development.
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Abstract
Neuraxial (spinal and epidural) anesthesia has become commonplace in the care of neonates undergoing surgical procedures. These techniques afford many benefits, and, when properly performed, are extremely safe. This article reviews the benefits, risks, and applications of neuraxial anesthesia in neonates.
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10
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Martin LD, Adams TL, Duling LC, Grigg EB, Bosenberg A, Onchiri F, Jimenez N. Comparison between epidural and opioid analgesia for infants undergoing major abdominal surgery. Paediatr Anaesth 2019; 29:835-842. [PMID: 31140664 DOI: 10.1111/pan.13672] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/21/2019] [Accepted: 05/24/2019] [Indexed: 11/27/2022]
Abstract
BACKGROUND Epidural analgesia is considered optimal for postoperative pain management after major abdominal surgery. The potential to decrease anesthetic and opioid exposure is particularly desirable for infants, given their vulnerability to respiratory depression and concern for anesthetic neurotoxicity. We reviewed our experience with infants undergoing major abdominal surgery to determine if epidural catheter use decreased anesthetic and opioid exposure and improved postoperative analgesia. METHODS This retrospective cohort study included infants (<12 months) who underwent exploratory laparotomy, ureteral reimplantation, or bladder exstrophy repair between November 2011 and November 2014. Primary outcomes of anesthetic exposure (mean endtidal sevoflurane) and intraoperative opioid administration were compared between infants who received epidural catheters and those who did not. Secondary outcomes included postoperative pain and sedation scores and morphine equivalents administered 0-24 and 24-48 hours after surgery. RESULTS Of 158 eligible infants, 82 were included and 47 received epidurals. Patients with epidurals underwent bladder exstrophy repair (N = 9), ureteral reimplantation (N = 8), and exploratory laparotomy (N = 30). Infants with epidurals received less intraoperative fentanyl (2.6 mcg/kg (0,4.5) vs 3.3 mcg/kg (2.4,5.8), P = 0.019) and morphine (6% (3/47) vs 26% (9/35), P = 0.014) in univariate analysis. After controlling for age and emergency surgery, differences in long-acting opioid administration persisted, with significantly less morphine given in the epidural group (OR 0.181; 95% CI 0.035-0.925; P = 0.040). Mean endtidal sevoflurane concentrations were similar between groups. There was no significant difference in postoperative median morphine equivalents. CONCLUSION Placement of epidural catheters in infants undergoing major abdominal surgery is associated with decreased long-acting opioid requirements intraoperatively. Epidural placement does not preclude opioid exposure however, as opioids may be administered for indications other than nociceptive pain in the difficult-to-assess postoperative infant. Further prospective studies are warranted to better quantify the effect of epidural analgesia on intraoperative anesthetic exposure in infants.
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Affiliation(s)
- Lizabeth D Martin
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
| | - Trevor L Adams
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
| | - Laura C Duling
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
| | - Eliot B Grigg
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
| | - Adrian Bosenberg
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
| | - Frankline Onchiri
- Core for Biomedical Statistics, Center for Clinical and Translational Research, Seattle Children's Research Institute, Seattle, Washington
| | - Nathalia Jimenez
- Department of Anesthesiology and Pain Management, University Washington Medical School, Seattle Children's Hospital, Seattle, Washington
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Phelps HM, Robinson JR, Chen H, Luckett TR, Conroy PC, Gillis LA, Hays SR, Lovvorn HN. Enhancing Recovery After Kasai Portoenterostomy With Epidural Analgesia. J Surg Res 2019; 243:354-362. [PMID: 31277012 DOI: 10.1016/j.jss.2019.05.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/24/2019] [Accepted: 05/30/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Biliary atresia (BA) is a rare obstructive cholangiopathy that presents in early infancy. The Kasai portoenterostomy (PE) improves survival with the native liver. Epidural analgesia is an appealing option to control pain in this fragile patient population, yet its safety, efficacy, and potential benefits remain unproven. METHODS Patients undergoing PE for BA between 2001 and 2016 at a single institution were identified by ICD codes. Preoperative laboratories, procedure details, and recovery outcomes were reviewed retrospectively. Outcomes of interest were need for postoperative mechanical ventilation, pain scores, normalized opioid administration, return of bowel function, and length of hospital stay after PE. RESULTS Of 47 infants undergoing PE for BA, 25 received epidural analgesia, and 22 did not. Infants with epidurals received less systemic opioids over the first 96 h postoperatively than those without (P < 0.001). Epidurals were associated with lower pain scores between 6 and 30 h postoperatively (P = 0.01 to 0.04), during which the highest median 6-h interval pain score was 0.2 (IQR 0-1.3) for patients with epidurals yet 2.1 (IQR 1.2-3.3) for patients without. Patients with epidurals (88%, n = 22) were more commonly extubated before leaving the operating room than those without (59%, n = 13; P = 0.02). No significant difference was observed in time to first bowel movement (P = 0.48) or first oral feed (P = 0.81). However, infants with epidurals had shorter hospital stays after PE than those without (6 d [IQR 5-7] versus 8 d [IQR 6.3-11], P = 0.01). No major complications were associated with epidural catheters. CONCLUSIONS Epidural analgesia in patients undergoing PE for BA appears safe and effectively controls pain while minimizing the need for systemic opioids. Reduced need for mechanical ventilation postoperatively and shortened hospital stays serve as further evidence for using epidurals to enhance recovery after PE.
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Affiliation(s)
- Hannah M Phelps
- Vanderbilt University School of Medicine, Nashville, TN; Surgical Outcomes Center for Kids, Monroe Carell, Jr. Children's Hospital, Nashville, TN.
| | - Jamie R Robinson
- Department of Pediatric Surgery, Vanderbilt University Medical Center, Nashville, TN; Department of Biomedical Informatics, Vanderbilt University, Nashville, TN
| | - Heidi Chen
- Surgical Outcomes Center for Kids, Monroe Carell, Jr. Children's Hospital, Nashville, TN; Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN
| | - Twila R Luckett
- Pediatric Pain Service, Monroe Carell, Jr. Children's Hospital, Nashville, TN
| | | | - Lynette A Gillis
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
| | - Stephen R Hays
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN; Department of Anesthesia, Vanderbilt University Medical Center, Nashville, TN
| | - Harold N Lovvorn
- Surgical Outcomes Center for Kids, Monroe Carell, Jr. Children's Hospital, Nashville, TN; Department of Pediatric Surgery, Vanderbilt University Medical Center, Nashville, TN
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Ebert KM, Jayanthi VR, Alpert SA, Ching CB, DaJusta DG, Fuchs ME, McLeod DJ, Whitaker EE. Benefits of spinal anesthesia for urologic surgery in the youngest of patients. J Pediatr Urol 2019; 15:49.e1-49.e5. [PMID: 30201472 DOI: 10.1016/j.jpurol.2018.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 08/09/2018] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Increasing concerns regarding potential negative effects of early use of inhalational and intravenous anesthetics on neurocognitive development have led to a growing interest in alternative forms of anesthesia in infants. The study institution's outcomes with spinal anesthesia (SA) for urologic surgery in infants aged less than 90 days are reported and their outcomes with a matched cohort of patients who underwent general anesthesia (GA) are compared. METHODS This is a retrospective single-center analysis. Patients aged less than 90 days who underwent SA for four urologic surgeries (inguinal hernia repair, scrotal exploration, posterior urethral valve ablation, and ureterocele puncture) were identified from the study institution's SA database. An age- and procedure-matched control cohort was identified from a list of patients who underwent the aforementioned four procedures under GA since 2013. Outcomes of interest included success rate of SA, complications from spinal placement, narcotic use, need for supplemental medications and oxygen, and length of hospital stay. RESULTS Forty patients were identified; 20 in the SA and 20 in the GA group. Mean patient age was 54 (standard deviation, 35) days. There were no significant differences between the groups in age, gender, weight, history of prematurity, or presence of comorbidities. Eighty percent of SA patients had successful SA; reasons for conversion to GA included failure of spinal needle placement (75%) and agitation during operative procedure (25%). Ninety-six percent of patients who received GA (primarily or converted) had an endotracheal tube (ETT) placed. No patient in the SA group had a complication from spinal needle placement. Patients in the SA group were less likely to receive narcotics during the operative procedure (P = 0.001) and also had a lower mean morphine equivalent dose/kilogram (P = 0.002). Patients in the SA group were also less likely to receive any supplemental medications during the operative procedure (P = 0.001), particularly intravenous corticosteroids (P < 0.001). There were no significant differences in the length of hospital stay. CONCLUSIONS The use of SA has clear advantages for this medically vulnerable population. For the majority of patients, it obviates the need for ETT placement and airway management and avoids the potential negative effects of GA on neurocognitive development. It also decreases the use of narcotics and other supplemental medications. In scenarios in which the benefit of surgery must be weighed against the risk of GA, such as neonatal torsion, SA may allow a paradigm shift in the timing of surgery.
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Affiliation(s)
- K M Ebert
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA.
| | - V R Jayanthi
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - S A Alpert
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - C B Ching
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - D G DaJusta
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - M E Fuchs
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - D J McLeod
- Nationwide Children's Hospital, Division of Urology, 700 Children's Drive, Columbus, OH 43205, USA
| | - E E Whitaker
- Nationwide Children's Hospital, Department of Anesthesiology, 700 Children's Drive, Columbus, OH 43205, USA
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14
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The basic principles of anesthesia for the neonate☆. COLOMBIAN JOURNAL OF ANESTHESIOLOGY 2017. [DOI: 10.1097/01819236-201701000-00010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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16
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Franklin AD, Hughes EM. Fluoroscopically guided tunneled trans-caudal epidural catheter technique for opioid-free neonatal epidural analgesia. J Anesth 2016; 30:493-7. [PMID: 26896945 DOI: 10.1007/s00540-016-2147-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 01/30/2016] [Indexed: 11/29/2022]
Abstract
Epidural analgesia confers significant perioperative advantages to neonates undergoing surgical procedures but may be very technically challenging to place using a standard interlaminar loss-of-resistance to saline technique given the shallow depth of the epidural space. Thoracic epidural catheters placed via the caudal route may reduce the risk of direct neural injury from needle placement, but often pose higher risks of infection and/or improper positioning if placed without radiographic guidance. We present a detailed method of placing a fluoroscopically guided, tunneled transcaudal epidural catheter, which may reduce both of these risks. The accuracy and precision of this technique often provides adequate analgesia to allow for opioid-free epidural infusions as well as significant reductions in systemic opioids through the perioperative period. Opioid-free analgesia using a regional anesthetic technique allows for earlier extubation and reduced perioperative sedation, which may have a less deleterious neurocognitive effect on the developing brain of the neonate.
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Affiliation(s)
- Andrew D Franklin
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Vanderbilt University Medical Center, 2200 Children's Way, Suite 3115, Nashville, TN, 37232, USA.
| | - Elisabeth M Hughes
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Vanderbilt University Medical Center, 2200 Children's Way, Suite 3115, Nashville, TN, 37232, USA
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Abstract
Prophylactic analgesia with local anaesthesia is widely used in children and has a good safety record. Performing regional blocks in anaesthetised children is a safe and generally accepted practice. When compared with adults, lower concentrations of local anaesthetics are sufficient in children; the onset of a block occurs more rapidly but the duration is usually shorter. Local anaesthetics have a greater volume of distribution, a lower clearance and a higher free (non-protein-bound) fraction. The recommended maximum dose has to be calculated for every individual. Peripheral blocks provide analgesia restricted to the site of surgery, and some of them have a very long duration of action. Abdominal wall blocks, such as transverse abdominis plane or ilio-inguinal nerve block, should be performed with the aid of ultrasound. Caudal anaesthesia is the single most important technique. Ropivacaine 0.2% or levobupivacaine 0.125 to 0.175% at roughly 1 ml kg⁻¹ is adequate for most indications. Clonidine and morphine can be used to prolong the duration of analgesia. Ultrasound is not essential for performing caudal blocks, but it may be helpful in case of anomalies suspected at palpation and for teaching purposes. The use of paediatric epidural catheters will probably decline in the future because of the potential complications.
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Srinivasan B, Karnawat R, Mohammed S, Chaudhary B, Ratnawat A, Kothari SK. Comparison of caudal and intravenous dexamethasone as adjuvants for caudal epidural block: A double blinded randomised controlled trial. Indian J Anaesth 2016; 60:948-954. [PMID: 28003698 PMCID: PMC5168899 DOI: 10.4103/0019-5049.195489] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background and Aims: Dexamethasone has a powerful anti-inflammatory action with significant analgesic benefits. The aim of this study was to compare the efficacy of dexamethasone administered through intravenous (IV) and caudal route on post-operative analgesia in paediatric inguinal herniotomy patients. Methods: One hundred and five paediatric patients undergoing inguinal herniotomy were included and divided into three groups. Each patient received a single caudal dose of ropivacaine 0.15%, 1.5 mL/kg combined with either corresponding volume of normal saline (Group 1) or caudal dexamethasone 0.1 mg/kg (Group 2) or IV dexamethasone 0.5 mg/kg (Group 3). Baseline, intra- and post-operative haemodynamic parameters, pain scores, time to rescue analgesia, total analgesic consumption and adverse effects were evaluated for 24 h after surgery. Unpaired Student's t-test and analysis of variance were applied for quantitative data and Chi-square test for qualitative data. Time to first analgesic administration was analysed by Kaplan–Meier survival analysis and log-rank test. Results: Duration of analgesia was significantly longer (P < 0.001), and total consumption of analgesics was significantly lower (P < 0.001) in Group II and III compared to Group I. The incidence of nausea and vomiting was higher in Group I (31.4%) compared to Group II and III (8.6%). Conclusions: Addition of dexamethasone both caudally or intravenously as an adjuvant to caudal 0.15% ropivacaine significantly reduced the intensity of post-operative pain and prolonged the duration of post-operative analgesia with the significant advantage of caudal over IV route.
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Affiliation(s)
- Bharath Srinivasan
- Department of Anaesthesiology and Critical Care, Dr. S N Medical College, Jodhpur, Rajasthan, India
| | - Rakesh Karnawat
- Department of Anaesthesiology and Critical Care, Dr. S N Medical College, Jodhpur, Rajasthan, India
| | - Sadik Mohammed
- Department of Paediatric Surgery, Dr. S N Medical College, Jodhpur, Rajasthan, India
| | - Bharat Chaudhary
- Department of Anaesthesiology and Critical Care, Dr. S N Medical College, Jodhpur, Rajasthan, India
| | - Anil Ratnawat
- Department of Anaesthesiology and Critical Care, Dr. S N Medical College, Jodhpur, Rajasthan, India
| | - Sunil Kumar Kothari
- Department of Anaesthesiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
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Bairdain S, Dodson B, Zurakowski D, Waisel DB, Jennings RW, Boretsky KR. Paravertebral nerve block catheters using chloroprocaine in infants with prolonged mechanical ventilation for treatment of long-gap esophageal atresia. Paediatr Anaesth 2015; 25:1151-7. [PMID: 26272104 DOI: 10.1111/pan.12736] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/30/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Infants with long-gap esophageal atresia (LGEA) undergo repeated thoracotomies for staged surgical repair known as the Foker process (FP). Associated prolonged mechanical ventilation results in exposure to high doses of opioids and benzodiazepines, and prolonged weaning times and ICU stays. AIM The aim of this study was to determine the effectiveness of short-term paravertebral nerve block (PVNB) catheters in reducing opioid/benzodiazepine exposure and effects on clinical variables. METHODS The medical records of seventeen infants were retrospectively reviewed; 11 with PVNB and six without (CG). PVNB were placed using ultrasound-guidance and chloroprocaine infusions implemented in the ICU. Opioids and benzodiazepines were administered via the protocol for 5 days following thoracotomies for Foker-I and Foker-II. RESULTS Foker-I: Average reduction in morphine and midazolam consumption was 36% (2.18 vs 3.40 mg·kg(-1) ·day(-1) ; P < 0.001) and 31% (2.25 vs 3.25 mg·kg(-1) ·day(-1) ; P = 0.033), respectively, in the PVNB compared with CG. Foker-II: Average reduction in morphine and midazolam consumption was 39% (3.19 vs 5.27 mg·kg(-1) ·day(-1) ) and 38% (3.46 mg·kg(-1) ·day(-1) vs 5.62; P < 0.001), respectively in the PVNB compared with CG. 24-h prior to extubation: Average reduction in morphine and midazolam consumption was 50% (2.91 vs 5.85 mg·kg(-1) ·24 h(-1) ; p = 0.023) and 61% (2.27 vs 5.83 mg·kg(-1) ·24 h(-1) ; P = 0.004), respectively, in the PVNB compared with CG. Infusion wean time, (independence from opioid/midazolam infusions) following extubation was 5 days in the PVNB group and 15 days in CG (P = 0.005). Median ICU stay (IQR) was 40 days (34-45 days) in PVNB patients and 71 days (42-106 days) in controls (P = 0.02). PVNB catheters were left an average of 7 days and there were no complications associated with the nerve blocks. CONCLUSION Short-term PVNB placement decreases opioid and benzodiazepine exposure, weaning days and ICU stay in infants undergoing prolonged mechanical ventilation for LGEA repair in this small pilot study. Larger studies are warranted to confirm results.
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Affiliation(s)
- Sigrid Bairdain
- Department of Pediatric Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Brenda Dodson
- Department of Pharmacy, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - David Zurakowski
- Department of Pediatric Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.,Department of Anesthesia, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - David B Waisel
- Department of Anesthesia, Perioperative and Pain Medicine, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Russell W Jennings
- Department of Pediatric Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Karen R Boretsky
- Department of Anesthesia, Perioperative and Pain Medicine, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
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Abstract
Ongoing advances in the perioperative management of the newborn have undoubtedly decreased the incidence of morbidity and mortality of this vulnerable patient group. The introduction of new surgical techniques and more comprehensive understanding of the effects of varied anesthetic drugs and techniques on the surgical newborn present many challenges for pediatric surgeons and anesthesiologists. Thorough preoperative evaluation and open communication between members of the health care team are important. A basic understanding of age-dependent variables and the interaction of anesthetic and surgical procedures is essential in minimizing perioperative morbidity and mortality.
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Affiliation(s)
- Mary Ellen McCann
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children׳s Hospital, 300 Longwood Ave, Boston, MA 02115; Department of Anaesthesia, Harvard Medical School, Boston, MA.
| | - Sulpicio G Soriano
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children׳s Hospital, 300 Longwood Ave, Boston, MA 02115; Department of Anaesthesia, Harvard Medical School, Boston, MA
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Bosenberg AT. Regional anaesthesia in children: an update. SOUTHERN AFRICAN JOURNAL OF ANAESTHESIA AND ANALGESIA 2014. [DOI: 10.1080/22201173.2013.10872942] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- AT Bosenberg
- Department Anesthesiology and Pain Management, Faculty Health Sciences University of Washington, Seattle Children's Hospital, Seattle, Washington, USA
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Caudal anesthesia with sedation for inguinal hernia repair in high risk neonates. J Pediatr Surg 2014; 49:1304-7. [PMID: 25092095 DOI: 10.1016/j.jpedsurg.2013.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/05/2013] [Accepted: 11/05/2013] [Indexed: 11/22/2022]
Abstract
BACKGROUND/PURPOSE The use of caudal anesthesia with sedation (CAS) has theoretical benefits over general anesthesia (GA) in high risk neonates undergoing inguinal hernia repair. This benefit has not been established in clinical studies. We compare outcomes of these two approaches at a single institution. METHODS A retrospective review was performed of all neonates and preterm infants undergoing inguinal hernia over an 8year period. RESULTS Of 71 infants meeting inclusion criteria, 50 underwent repair with caudal block and systemic sedation, and 21 with general anesthesia. Minor incidents of respiratory depression requiring non invasive interventions were common in the first 24h post operatively (24% for CAS, 14% with GA), 4% of patients receiving CAS had a respiratory complication which prolonged their hospital stay beyond 24h post operation. Both required conversion to general anesthesia. Statistically significant differences between the two groups were lacking in terms of preoperative risk and post operative outcome. CONCLUSIONS CAS is a safe, effective anesthetic option for high risk neonates undergoing inguinal hernia repair. Patients requiring conversion to GA from CAS may be at increased risk for complications. Large, randomized trials are needed to determine any benefit over GA.
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Di Pede A, Morini F, Lombardi MH, Sgrò S, Laviani R, Dotta A, Picardo SG. Comparison of regional vs. systemic analgesia for post-thoracotomy care in infants. Paediatr Anaesth 2014; 24:569-73. [PMID: 24712833 DOI: 10.1111/pan.12380] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/02/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND In infants, post-thoracotomy analgesia traditionally consists of systemic opiates, while regional techniques have gained more favor in recent years. We compare the two techniques for thoracotomy in infants. METHODS All consecutive patients below 6 months of age who underwent thoracotomy for congenital pulmonary malformations in the study period were retrospectively divided according to the chosen postoperative analgesia: Group S systemic opiates, Group R continuous regional (epidural or extrapleural paravertebral) block. We studied the following outcomes: need for NICU and mechanical ventilation, pain score, requirement for additional analgesics, heart rate 1 h postsurgery, time to pass first stool and to full feed, complications, and duration of hospitalization. RESULTS Forty consecutive patients were included, 19 in Group S and 21 in Group R. Median age at surgery was 89 days (40-110) and 90 days (46-117), respectively. Five of 19 patients in Group S vs none in Group R required postoperative intensive care (P = 0.017). Patients in Group R had significantly lower postoperative heart rate (145 [138-150] vs. 160 [152-169] b·min(-1) , P = 0.007), earlier passage of first stools (24 h [12-24] vs. 36 h [24-48] P = 0.004), and earlier time to full feed (36 h [24-48] vs. 84 h [60-120] P = 0.0001) than those in Group S. The only observed complication was one catheter dislocation. CONCLUSION In infants undergoing thoracotomy, loco-regional analgesia is effective and associated with a reduced intensity of postoperative care and earlier full feeding than systemic analgesia; it should therefore be considered a better option.
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Affiliation(s)
- Alessandra Di Pede
- Department of Medical and Surgical Neonatology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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Perioperative epidural analgesia in children undergoing major abdominal tumor surgery--a single center experience. J Pediatr Surg 2014; 49:551-5. [PMID: 24726111 DOI: 10.1016/j.jpedsurg.2013.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/31/2013] [Accepted: 10/08/2013] [Indexed: 11/23/2022]
Abstract
PURPOSE The purpose of this study was to assess the use of continuous epidural analgesia in pediatric patients undergoing major abdominal tumor surgery. METHODS Children undergoing major abdominal tumor surgery at our institution between 2008 and 2012 (n=40) received continuous epidural analgesia via an epidural catheter. Surgical trauma scores, pain scores, and clinical data of the children were compared to a pair-matched historical control group operated on between 2002 and 2007 without epidural analgesia. RESULTS Pain levels in the study group on day 1 and 3 after surgery were lower compared to the control group. The differences did, however, not reach statistical significance (p=0.15 and 0.09). Children in the study group received significantly fewer additional doses of piritramide or morphine (45% versus 82%, p<0.001). Despite significantly higher surgical trauma scores in the study group (p=0.018), there were no statistical differences regarding clinical parameters, such as mechanical ventilation time, time on intensive care unit, and total hospital stay. There were no catheter-related complications. CONCLUSIONS Continuous epidural analgesia is beneficial for children undergoing complex abdominal tumor surgery with regard to pain levels, postoperative recovery, and general clinical course. Expertise of the managing team, a careful patient selection, and a continuous quality assessment are essential for success.
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Maitra S, Baidya DK, Khanna P, Ray BR, Panda SS, Bajpai M. Acute perioperative pain in neonates: An evidence-based review of neurophysiology and management. ACTA ACUST UNITED AC 2014; 52:30-7. [DOI: 10.1016/j.aat.2014.02.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 02/10/2014] [Indexed: 10/25/2022]
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Maitra S, Baidya DK, Pawar DK, Arora MK, Khanna P. Epidural anesthesia and analgesia in the neonate: a review of current evidences. J Anesth 2014; 28:768-79. [DOI: 10.1007/s00540-014-1796-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 01/19/2014] [Indexed: 01/16/2023]
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Abstract
Optimal pain management can significantly impact the surgical outcome and length of stay in the neonatal intensive care unit (NICU). Regional anesthesia is an effective alternative that can be used in both term and preterm neonates. A variety of neuraxial and peripheral nerve blocks have been used for specific surgical and NICU procedures. Ultrasound guidance has increased the feasibility of using these techniques in neonates. Education and training staff in the use of continuous epidural infusions are important prerequisites for successful implementation of regional anesthesia in NICU management protocols.
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Affiliation(s)
- Adrian Bosenberg
- Department of Anesthesiology and Pain Management, Faculty Health Sciences, Seattle Children's Hospital, University Washington, 4800 Sandpoint Way Northeast, Seattle, WA 98105, USA
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Affiliation(s)
- Navdeep Sethi
- Department of Anaesthesiology and Critical Care, AFMC, Pune, Maharashtra, India
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30
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Lin EE, Tran KM. Reducing postoperative ileus: does the anesthetic technique matter? J Clin Anesth 2012; 24:437-8. [PMID: 22986316 DOI: 10.1016/j.jclinane.2012.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 03/30/2012] [Accepted: 04/18/2012] [Indexed: 10/27/2022]
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Current world literature. Curr Opin Anaesthesiol 2012; 25:629-38. [PMID: 22955173 DOI: 10.1097/aco.0b013e328358c68a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Pediatric regional anesthesia continues to evolve. Education and attention to anatomical detail remain key elements to successful outcomes. New techniques, some adapted from adult practice, provide analgesia for pediatric surgical procedures such cleft palate or congenital hip dysplasia. Despite technological advances a number of controversial issues remain unresolved.
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Affiliation(s)
- Adrian Bosenberg
- Department Anesthesiology and Pain Management, Faculty Health Sciences, University Washington, Seattle, WA 98105, USA.
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