Aspiration prevention includes (1) clear liquids, (2) solids, and (3) antacids, H2-receptor antagonists, and metoclopramide. A randomized trial comparing low-dose combined spinal-epidural anesthesia and conventional epidural anesthesia for cesarean section in severe preeclampsia. Preparation of these guidelines followed a rigorous methodological process. The ASA guidelines indicate that patients should not drink fluids or eat solid foods for a sufficient Practice Guidelines for Moderate Procedural Sedation and Analgesia 2018: A Report by the American Society of Anesthesiologists Task Force on Moderate Procedural Sedation and Analgesia, the American Association of Oral and Maxillofacial Surgeons, American College of Radiology, American Dental Association, American Society of Dentist Anesthesiologists, and Society of Interventional … Ephedrine and phenylephrine for avoiding maternal hypotension due to spinal anaesthesia for caesarean section. If cardiac arrest occurs, initiate standard resuscitative measures. Comparing the efficacy of prophylactic metoclopramide, ondansetron, and placebo in cesarean section patients given epidural anesthesia. The consultants and ASA members agree that PCEA may be used with or without a background infusion. Ropivacaine 1 mg/ml, plus fentanyl 2 microg/ml for epidural analgesia during labour. Conclusion: This study raised awareness of the updated ASA Physical Classification System and led to defining the subjective terms ‘minimal’ and ‘social’ alcohol: alcohol intake <14units/week, 14-21U/week, >21U/week or alcohol risk score ≥5 for ASA 1, 2 or 3 respectively. Anesthetic care for labor and vaginal delivery includes (1) timing of neuraxial analgesia and outcome of labor, (2) neuraxial analgesia and trial of labor after prior cesarean delivery, and (3) anesthetic/analgesic techniques. These guidelines focus on the anesthetic management of pregnant patients during labor, nonoperative delivery, operative delivery, and selected aspects of postpartum care and analgesia (i.e., neuraxial opioids for postpartum analgesia after neuraxial anesthesia for cesarean delivery). Epidural analgesia. Support was provided solely from institutional and/or departmental sources. In the absence of Mantel–Haenszel odds ratios, findings from both the Fisher and weighted Stouffer combined tests must agree with each other to be acceptable as significant. The rate of return was 35%(n = 36). The consultants and ASA members strongly agree to consider early insertion of a neuraxial catheter for obstetric (e.g., twin gestation or preeclampsia) or anesthetic indications (e.g., anticipated difficult airway or obesity) to reduce the need for GA if an emergent procedure becomes necessary. Comparison of the maternal and neonatal effects of epidural block and of combined spinal-epidural block for cesarean section. Combined spinal-epidural anesthesia with epidural volume extension causes a higher level of block than single-shot spinal anesthesia. Controlled trial of extradural bupivacaine with fentanyl, morphine or placebo for pain relief in labour. How does this statement differ from existing guidelines? The consultants and ASA members both agree that before surgical procedures (e.g., cesarean delivery or postpartum tubal ligation), consider the timely administration of nonparticulate antacids, H2-receptor antagonists, and/or metoclopramide for aspiration prophylaxis. Practice Guidelines for Preoperative Fasting and the Use of Pharmacologic Agents to Reduce the Risk of Pulmonary Aspiration: Application to Healthy Patients Undergoing Elective Procedures: An Updated Report by the American Society of Anesthesiologists Task Force on Preoperative Fasting and the Use of Pharmacologic Agents to Reduce the Risk of Pulmonary Aspiration * Randomized comparison of general and regional anesthesia for cesarean delivery in pregnancies complicated by severe preeclampsia. The American Heart Association further notes that “the best survival rate for infants more than 24 to 25 weeks in gestation occurs when the delivery of the infant occurs no more than 5 min after the mother’s heart stops beating. Practice guidelines for preoperative fasting and the use of pharmacologic agents to reduce the risk of pulmonary aspiration: application to healthy patients undergoing elective procedures: an updated report by the American Society of Anesthesiologists Committee on Standards and Practice Parameters. Both the timing of the procedure and the decision to use a particular anesthetic technique (i.e., neuraxial vs. general) should be individualized, based on anesthetic and obstetric risk factors (e.g., blood loss), and patient preferences. Offer neuraxial techniques to patients attempting vaginal birth after previous cesarean delivery. %���� Patient-controlled epidural analgesia in labour: Varying bolus dose and lockout interval. Effect of combined spinal-epidural analgesia, Regional analgesia in early active labour: Combined spinal epidural. Acute normovolemic hemodilution, intraoperative cell salvage and PulseCO hemodynamic monitoring in a Jehovah’s Witness with placenta percreta. The consultants and ASA members strongly agree that labor and delivery units should have personnel and equipment readily available to manage airway emergencies consistent with the ASA Practice Guidelines for Management of the Difficult Airway, to include a pulse oximeter and carbon dioxide detector. However, in 1999, evidence-based guidelines for pre-operative fasting were published by the American Society of Anesthesiologists (ASA): 2 hours for clear liquids; 4 hours for breast milk; 6 hours for a light meal; and 8 hours for unrestricted intake. Practice guidelines are subject to revision as warranted by the evolution of medical knowledge, technology, and practice. Practice advisory for preanesthesia evaluation: An updated report by the American Society of Anesthesiologists Task Force on Preanesthesia Evaluation. Address correspondence to the American Society of Anesthesiologists: 1061 American Lane, Schaumburg, Illinois 60173. The interventions listed below were examined to assess their relation to a variety of outcomes related to obstetric anesthesia. Prospective, randomized trial comparing general with spinal anesthesia for cesarean delivery in preeclamptic patients with a nonreassuring fetal heart trace. Epidural hydromorphone: A double-blind comparison with intramuscular hydromorphone for postcesarean section analgesia. Since the NPO guidelines had been in place, advances in technology and research have illuminated the need to adjust standard perioperative practices. ASA VI A declared brain-dead patient whose organs are being removed for donor purposes *The addition of “E” denotes emergency surgery: (An emergency is defined as existing when delay in treatment of the patient would lead to a significant increase in the threat to life or body part) AMERICAN SOCIETY OF ANESTHESIOLOGISTS’ FASTING GUIDELINES3 In these cases, the insertion of a neuraxial catheter may precede the onset of labor or a patient’s request for labor analgesia. A routine blood cross-match is not necessary for healthy and uncomplicated parturients for vaginal or operative delivery. The use of PCEA may be preferable to fixed-rate continuous infusion epidural analgesia for administering reduced dosages of local anesthetics. Intravenous nitroglycerin: A potent uterine relaxant for emergency obstetric procedures. In addition, the literature is insufficient to evaluate the impact of the timing of a postpartum tubal ligation on maternal outcome. Extradural block in patients who have previously undergone caesarean section. (Committee Chair), Chicago, Illinois; Joy L. Hawkins, M.D. Maternal request represents sufficient justification for pain relief. Effects of general and regional anesthesia on the neonate (a prospective, randomized trial). ACOG = American College of Obstetricians and Gynecologists ASA = American Society of Anesthesiologists Correlation between bleeding times and platelet counts in women with preeclampsia undergoing cesarean section. Fetal and maternal effects of phenylephrine and ephedrine during spinal anesthesia for cesarean delivery. The role of continuous background infusions in patient-controlled epidural analgesia for labor and delivery. These evidence categories are further divided into evidence levels. Fetal heart rate and neonatal condition related to epidural analgesia in women reaching the second stage of labour. Randomized controlled trials indicate that preoperative nonparticulate antacids (e.g., sodium citrate and sodium bicarbonate) are associated with higher gastric pH values during the peripartum period (Category A2-B evidence)32–35  and are equivocal regarding gastric volume (Category A2-E evidence).32,33  Randomized placebo-controlled trials indicate that H2-receptor antagonists are associated with higher gastric pH values in obstetric patients (Category A2-B evidence) and are equivocal regarding gastric volume (Category A2-E evidence).36–38  Randomized placebo-controlled trials indicate that metoclopramide is associated with reduced peripartum nausea and vomiting (Category A2-B evidence).39–43  Literature is not available that examines the relation between reduced gastric acidity and the frequency of pulmonary aspiration, emesis, morbidity, or mortality in obstetric patients who have aspirated gastric contents. Risk of respiratory arrest after intrathecal sufentanil. Diamorphine analgesia after caesarean section. An RCT reports greater pain relief during labor for CIE when compared with intramuscular opioids (Category A3-B evidence), with equivocal findings for duration of labor and mode of delivery (Category A3-E evidence).59  A nonrandomized comparative study reports equivocal findings for duration of labor and mode of delivery when CIE local anesthetics are compared with single-injection spinal opioids (Category B1-E evidence).60. Analgesia following extradural and i.m. Safety of intravenous glyceryl trinitrate in management of retained placenta. When a neuraxial technique is chosen, appropriate resources for the treatment of complications (e.g., hypotension, systemic toxicity, and high spinal anesthesia) should be available. Evidence levels refer specifically to the strength and quality of the summarized study findings (i.e., statistical findings, type of data, and the number of studies reporting/replicating the findings within the evidence categories). This article is featured in “This Month in Anesthesiology,” page 1A. The consultants and ASA members strongly agree that (1) continuous epidural infusion may be used for effective analgesia for labor and delivery and (2) when a continuous epidural infusion of local anesthetic is selected, an opioid may be added. Meta-analyses from other sources are reviewed but not included as evidence in this document. Intravenous nitroglycerin for rapid uterine relaxation. Vaginal birth after cesarean section: Results of a multicenter study. Spinal anesthesia-induced hypotension: A risk comparison between patients with severe preeclampsia and healthy women undergoing preterm cesarean delivery. 4 0 obj Prophylactic ephedrine preceding spinal analgesia for cesarean section. 106: Intrapartum fetal heart rate monitoring: Nomenclature, interpretation, and general management principles. Prevention of postoperative nausea and vomiting by domperidone: A double-blind randomized study using domperidone, metoclopramide and a placebo. Three-rater chance-corrected agreement values were as follows: (1) study design, Sav = 0.884, Var (Sav) = 0.004; (2) type of analysis, Sav = 0.805, Var (Sav) = 0.009; (3) linkage assignment, Sav = 0.911, Var (Sav) = 0.002; (4) literature database inclusion, Sav = 0.660, Var (Sav) = 0.024. Comparison between colloid preload and crystalloid co-load in cesarean section under spinal anesthesia: A randomized controlled trial. Examples of clear liquids include, but are not limited to, water, fruit juices without pulp, carbonated beverages, clear tea, black coffee, and sports drinks. The effect of epidural opioids on maternal oxygenation during labour and delivery. Intrathecal morphine as analgesia for labor pain. The effects of lactated Ringer’s solution infusion on cardiac output changes after spinal anesthesia. Pre-anaesthetic assessment of coagulation abnormalities in obstetric patients: Usefulness, timing and clinical implications. Hypertensive disorders and pregnancy-related stroke: Frequency, trends, risk factors, and outcomes. Naan DerThaal. A routine platelet count is not necessary in the healthy parturient. This statement presents new findings from the scientific literature since 2006 and surveys of both expert consultants and randomly selected ASA members. Re-evaluation of i.m. The antiemetic efficacy and safety of prophylactic metoclopramide for elective cesarean delivery during spinal anesthesia. The American College of Obstetricians and Gynecologists Practice Bulletin focuses on limited aspects of cesarean anesthesia (e.g., when an anesthesiology consult is appropriate) and of labor analgesia (e.g., parenteral opioids) that an obstetrician would use to counsel their patients. Survey responses from Task Force–appointed expert consultants are reported in summary form in the text, with a complete listing of the consultant survey responses reported in appendix 2. To be accepted as significant findings, Mantel–Haenszel odds ratios must agree with combined test results whenever both types of data are assessed. Use dilute concentrations of local anesthetics with opioids to produce as little motor block as possible. Appropriate equipment and personnel should be available to care for obstetric patients recovering from neuraxial or general anesthesia. A preformulated strategy for intubation of the difficult airway should be in place. One respondent indicated that there would be an increase of 5 min in the amount of time spent on a typical case with the implementation of these guidelines. The resultant guidelines, presented in this issue, incorporate an analysis of current scientific literature and expert consultant survey results. The Task Force notes that the addition of an opioid to a local anesthetic infusion allows an even lower concentration of local anesthetic for providing equally effective analgesia. Circulation 2010; 122 (18 suppl 3):S640–933. The ASA members agree and the consultants strongly agree that (1) oral intake of moderate amounts of clear liquids may be allowed for uncomplicated laboring patients and (2) the uncomplicated patient undergoing elective surgery (e.g., scheduled cesarean delivery or postpartum tubal ligation) may have moderate amounts of clear liquids up to 2 h before induction of anesthesia. Patient-controlled epidural analgesia during labor using ropivacaine and fentanyl provides better maternal satisfaction with less local anesthetic requirement. Review of literature and report of three cases. This teaching predominately comes from the ASA’s Practice Guideline for Sedation and Analgesia by Non-Anesthesiologists published in 2002 (and earlier iterations). Anesthetic considerations for placenta accreta. A comparison of epidural and intramuscular morphine in patients following cesarean section. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Comparison of midwife top-ups, continuous infusion and patient-controlled epidural analgesia for maintaining mobility after a low-dose combined spinal-epidural. Prophylactic ephedrine and hypotension associated with spinal anesthesia for cesarean delivery. If maternal circulation is not restored within 4 min, cesarean delivery should be performed by the obstetrics team.§§§. Does the use of low dose bupivacaine/opioid epidural infusion increase the normal delivery rate? Accepted for publication October 28, 2015. abnormal findings other than correctable labs ( refer to ASA #2 abnormal findings LABS CXR EKG normal findings PTC visit schedule in O.R. Maternal outcomes in pregnancies complicated by obesity. This document represents the first practice guideline to be developed as a collaborative effort between the ASA and a subspecialty society (Society for Obstetric Anesthesia and Perinatology) with content expertise relevant to the recommendations. In October 2014, the ASA Committee on Standards and Practice Parameters, in collaboration with the Society for Obstetric Anesthesia and Perinatology, elected to collect new evidence to determine whether recommendations in the existing practice guidelines continue to be supported by current evidence. Does metoclopramide supplement postoperative analgesia using patient-controlled analgesia with morphine in patients undergoing elective cesarean delivery? Second, a panel of expert consultants was asked to (1) participate in opinion surveys on the effectiveness of various anesthetic management strategies and (2) review and comment on a draft of the update developed by the Task Force. A dose-response study of prophylactic intravenous ephedrine for the prevention of hypotension during spinal anesthesia for cesarean delivery. Anesth Analg 2014; 118:1003. Diabetes – Fasting BMP; ECG for all patients with evidence of end organ damage or compromised exercise Institutions providing obstetric care should have resources available to manage hemorrhagic emergencies (table 1). Randomized controlled trials comparing epidural opioids with intermittent injections of IV or intramuscular opioids report improved postoperative analgesia for epidural opioids after cesarean delivery (Category A2-B evidence)200–206 ; meta-analysis of RCTs report equivocal findings for nausea, vomiting, and pruritus (Category A1-E evidence).200–204,206–211 RCTs report improved postoperative analgesia when PCEA is compared with IV patient-controlled analgesia (Category A2-B evidence) with equivocal findings for nausea, vomiting, pruritus, and sedation (Category A2-E evidence).208,211. Background infusion is not beneficial during labor patient-controlled analgesia with 0.1% ropivacaine plus 0.5 microg/ml sufentanil. Efficacy of subarachnoid meperidine for labor analgesia. In cases involving major maternal hemorrhage with hemodynamic instability, GA with an endotracheal tube may be considered in preference to neuraxial anesthesia. The anesthesiologist’s decision to order or require a platelet count should be individualized and based on a patient’s history (e.g., preeclampsia with severe features), physical examination, and clinical signs.‖‖‖, The patient undergoing elective surgery (e.g., scheduled cesarean delivery or postpartum tubal ligation) should undergo a fasting period for solids of 6 to 8 h depending on the type of food ingested (e.g., fat content).###. The literature is insufficient to assess whether a particular anesthetic technique is more effective than another for removal of retained placenta. The information in this appendix is intended to provide overview and context for issues concerned with anesthetic care for labor and delivery and are not guideline recommendations. Continuous infusion epidural analgesia during labor: A randomized, double-blind comparison of 0.0625% bupivacaine/0.0002% fentanyl, Continuous infusion epidural analgesia for obstetrics: Bupivacaine. Overview of Anesthetic Care for Labor and Delivery, https://doi.org/10.1097/ALN.0000000000000935, Quantitative Research Methods in Medical Education, Calculating Ideal Body Weight: Keep It Simple, Practice Guidelines for Moderate Procedural Sedation and Analgesia 2018, Serious Complications Related to Obstetric Anesthesia: The Serious Complication Repository Project of the Society for Obstetric Anesthesia and Perinatology, Establishing Obstetric Anesthesiology Practice Guidelines in the Republic of Armenia: A Global Health Collaboration, Practice Guidelines for Central Venous Access 2020: An Updated Report by the American Society of Anesthesiologists Task Force on Central Venous Access, Anesthesiologist Specialization and Use of General Anesthesia for Cesarean Delivery, Assessment of the Intrarater and Interrater Reliability of an Established Clinical Task Analysis Methodology, © Copyright 2020 American Society of Anesthesiologists. Patient-controlled analgesia following cesarean section: A comparison with epidural and intramuscular narcotics. Comparison of continuous background infusion plus demand dose and demand-only parturient-controlled epidural analgesia (PCEA) using ropivacaine combined with sufentanil for labor and delivery. When tracheal intubation has failed, consider ventilation with mask and cricoid pressure or with a supraglottic airway device (e.g., laryngeal mask airway, intubating laryngeal mask airway, and laryngeal tube) for maintaining an airway and ventilating the lungs. Does early administration of epidural analgesia affect obstetric outcome in nulliparous women who are receiving intravenous oxytocin? Use of recombinant activated factor VII in primary postpartum hemorrhage: The Northern European registry 2000–2004. In cases involving major maternal hemorrhage with hemodynamic instability, general anesthesia with an endotracheal tube may be considered in preference to neuraxial anesthesia. Uterine displacement (usually left displacement) should be maintained. General anesthesia for cesarean delivery in a patient with paroxysmal nocturnal hemoglobinuria and thrombocytopenia. The choice of a specific neuraxial technique should be individualized and based on anesthetic risk factors, obstetric risk factors, patient preferences, progress of labor, and resources at the facility. Is ephedrine infusion more effective at preventing hypotension than traditional prehydration during spinal anaesthesia for caesarean section in African parturients? Continuous infusion epidural anesthesia during labor: A randomized, double-blind comparison of 0.0625% bupivacaine/0.002% butorphanol and 0.125% bupivacaine. They provide basic recommendations that are supported by a synthesis and analysis of the current literature, expert and practitioner opinion, open-forum commentary, and clinical feasibility data. Coagulation profile in severe preeclampsia. Consider selecting neuraxial techniques in preference to GA for most postpartum tubal ligations. Level 2: The literature contains noncomparative observational studies with associative statistics (e.g., relative risk, correlation, or sensitivity/specificity). When a neuraxial anesthetic is planned, examine the patient’s back. The literature is insufficient to evaluate the benefits of neuraxial anesthesia compared with GA for postpartum tubal ligation. When warranted, the Task Force may add educational information or cautionary notes based on this information. Be aware that gastric emptying will be delayed in patients who have received opioids during labor. These Practice Guidelines update the “Practice Guidelines for Obstetric Anesthesia: An Updated Report by the American Society of Anesthesiologists Task Force on Obstetric Anesthesia,” adopted by the American Society of Anesthesiologists (ASA) in 2006 and published in 2007. The literature is insufficient to determine whether obtaining a blood type and screen is associated with fewer maternal anesthetic complications. These recommendations may be adopted, modified, or rejected according to the clinical needs and constraints and are not intended to replace local institutional policies. In the absence of maternal bradycardia, consider selecting phenylephrine because of improved fetal acid–base status in uncomplicated pregnancies. These linkages were (1) early versus late epidural anesthetics, (2) epidural local anesthetics with opioids versus equal concentrations of epidural local anesthetics without opioids, (3) CIE of local anesthetics with opioids versus higher concentrations of local anesthetics without opioids, (4) pencil-point versus cutting-bevel spinal needles, (5) CSE local anesthetics with opioids versus epidural local anesthetics with opioids, (6) PCEA versus CIE anesthetics, (7) PCEA with a background infusion versus PCEA, (8) GA versus epidural anesthesia for cesarean delivery, (9) CSE anesthesia versus epidural anesthesia for cesarean delivery, (10) fluid preloading versus coloading for cesarean delivery, (11) ephedrine versus placebo for cesarean delivery, (12) ephedrine versus phenylephrine for cesarean delivery, and (13) neuraxial versus parenteral opioids for postoperative analgesia. The effects of the addition of sufentanil to 0.125% bupivacaine on the quality of analgesia during labor and on the incidence of instrumental deliveries. Comparison of prophylactic angiotensin II. Epidural PCA with bupivacaine 0.125%, sufentanil 0.75 microgram and epinephrine 1/800.000 for labor analgesia: Is a background infusion beneficial? pethidine in post-caesarean section patients. Level 3: The literature contains noncomparative observational studies with descriptive statistics (e.g., frequencies and percentages). Anesthesiology 2007; 124:270–300. For postoperative analgesia after neuraxial anesthesia for cesarean delivery, consider selecting neuraxial opioids rather than intermittent injections of parenteral opioids. For the previous update, interobserver agreement among Task Force members and two methodologists was established by interrater reliability testing. Headache after spinal anesthesia for cesarean section: A comparison of the 27-gauge Quincke and 24-gauge Sprotte needles. Fetal heart rate patterns should be monitored by a qualified individual before and after administration of neuraxial analgesia for labor. The authors declare no competing interests. Plasma β-thromboglobulin in normal pregnancy and pregnancy-induced hypertension. Laboratory findings in hypertensive disorders of pregnancy. ASA Practice Guidelines for Preoperative Fasting By Thelma Z. Korpman, M.D., MBA I have been in the practice of anesthesia for over 30 years and have rewritten NPO guidelines for my institution at least once for every year in practice. There is insufficient published literature to examine the relation between fasting times for clear liquids and the risk of emesis/reflux or pulmonary aspiration during labor. All opinion-based evidence (e.g., survey data, Internet-based comments, letters, and editorials) relevant to each topic was considered in the development of these updated guidelines. Maternal and fetal haemodynamic effects of spinal and extradural anaesthesia for elective caesarean section. Findings were then summarized for each evidence linkage. American College of Obstetricians and Gynecologists: ACOG Practice Bulletin No. Meta-analyses of RCTs report improved analgesic quality61–65  when comparing epidural local anesthetics combined with opioids versus equal concentrations of epidural local anesthetics without opioids (Category A1-B evidence). Each pertinent outcome reported in a study was classified by evidence category and level, and designated as either beneficial, harmful, or equivocal. Evidence that intravenous vasopressors can affect rostral spread of spinal anesthesia in pregnancy. Agreement levels using a κ statistic for two-rater agreement pairs were as follows: (1) type of study design, κ = 0.83 to 0.94; (2) type of analysis, κ = 0.71 to 0.93; (3) evidence linkage assignment, κ = 0.87 to 1.00; and (4) literature inclusion for database, κ = 0.74 to 1.00. The Task Force recognizes that in laboring patients the timing of delivery is uncertain; therefore, adherence to a predetermined fasting period before nonelective surgical procedures is not always possible. Portable equipment for difficult airway management should be readily available in the operative area of labor and delivery units (table 3). Obstetric analgesia and anesthesia. Note that statements in appendix 3 are intended to provide an overview and are not recommendations. A prophylactic method against Mendelson’s syndrome in cesarean section. Phenylephrine in the prevention of hypotension following spinal anesthesia for cesarean delivery. Practice Guidelines are subject to revision as warranted by the evolution of medical knowledge, technology, and practice. To help facilitate a more efficient evaluation at the CPO visit, we recommend obtaining these tests prior to the patients visit with the CPO. �ǐxN���*���B���FkÃ�Dɋ��S��"� ���(1��]Ҍ�}����>�V*W@z��i�����]j�6���5-^`S�ĸ͗� �H�e�����S���� �^4��./s����:���s��yP��g,^�T����N:6��!O %Z�}�{��'. All of the guidelines and systematic reviews provided very similar recommendations for pre- and post-operative fasting. DerSimonian–Laird random-effects odds ratios were obtained when significant heterogeneity was found (P < 0.01). The uncomplicated patient undergoing elective surgery may have clear liquids up to 2 h before induction of anesthesia. When a neuraxial anesthetic is planned or placed, examine the patient’s back. The clinical effectiveness of epidural bupivacaine, bupivacaine with lidocaine, and bupivacaine with fentanyl for labor analgesia. scuss new insights into the physiology of gastric emptying of different categories of food and drink. For these updated guidelines, a review of studies used in the development of the previous update was combined with studies published subsequent to approval of the update in 2006.† The scientific assessment of these guidelines was based on evidence linkages or statements regarding potential relations between clinical interventions and outcomes. The consultants and ASA members agree to consider aspiration prophylaxis. Is mode of administration important? For urgent cesarean delivery, an indwelling epidural catheter may be used as an alternative to initiation of spinal or GA. GA may be the most appropriate choice in some circumstances (e.g., profound fetal bradycardia, ruptured uterus, severe hemorrhage, and severe placental abruption). Early compared with late neuraxial analgesia in nulliparous labor induction: A randomized controlled trial. (Task Force Chair), Denver, Colorado; Madhulika Agarkar, M.P.H., Schaumburg, Illinois; Brenda A. Bucklin, M.D., Denver, Colorado; Richard T. Connis, Ph.D., Woodinville, Washington; David R. Gambling, M.B.B.S., San Diego, California; Jill Mhyre, M.D., Little Rock, Arkansas; David G. Nickinovich, Ph.D., Bellevue, Washington; Heather Sherman, Ph.D., Schaum burg, Illinois; Lawrence C. Tsen, M.D., Boston, Massachusetts; and Edward (Ted) A. Yaghmour, M.D., Chicago, Illinois. Does it increase the spontaneous delivery, consider selecting phenylephrine because of improved acid–base. Who have previously undergone caesarean section analgesia for labor and delivery sufentanil: spinal. Appear in the text of this article on the Mantel–Haenszel method for combining study using! Units ( table 1 ) opioids during labor or delivery of coagulation abnormalities in obstetric anesthesia relative,. 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