Guidelines for Neuraxial Analgesia in Labor

Eligibility for Neuraxial Analgesia

• Neuraxial analgesia (epidural or spinal) should be offered to all laboring patients regardless of cervical dilation; no minimum dilation threshold is required. [American Society of Anesthesiologists] 1, 2
• Patients in early labor (cervical dilation < 5 cm) should be offered neuraxial analgesia when the service is available. [American Society of Anesthesiologists] 1, 2
• Epidural analgesia does not increase the incidence of cesarean delivery. [American Society of Anesthesiologists] 1, 2

Pre‑Procedure Assessment & Preparation

Focused History & Physical

• Perform a directed history and physical examination, including airway assessment (mouth opening, neck mobility, thyromental distance) and back examination for landmarks, prior surgery, or spinal abnormalities, before planning neuraxial anesthesia. [American Society of Anesthesiologists] 1, 3
• Presence of significant anesthetic or obstetric risk factors should trigger a joint obstetric‑anesthesiology consultation. [American Society of Anesthesiologists] 1

Laboratory Testing

• Routine intrapartum platelet count is not required for healthy, uncomplicated laboring patients. [American Society of Anesthesiologists] 4
• Obtain a platelet count before neuraxial placement when preeclampsia or coagulopathy is suspected. [American Society of Anesthesiologists] 4
• An intrapartum blood type and screen should be obtained for all parturients. [American Society of Anesthesiologists] 4

Intravenous Access

• Establish and maintain intravenous access before initiating neuraxial analgesia. [American Society of Anesthesiologists] 5, 6
• A fixed‑volume fluid bolus is not required prior to neuraxial placement in uncomplicated patients. [American Society of Anesthesiologists] 5

Aspiration Prophylaxis & Oral Intake

• Uncomplicated laboring patients may consume moderate amounts of clear liquids; solid foods should be avoided. [American Society of Anesthesiologists] 1, 2
• For patients with additional aspiration‑risk factors (e.g., morbid obesity, diabetes, difficult airway) or those at increased risk for operative delivery, oral‑intake restrictions should be individualized. [American Society of Anesthesiologists] 1, 2
• Prior to cesarean delivery, consider timely administration of non‑particulate antacids, H₂‑receptor antagonists, and/or metoclopramide for aspiration prophylaxis. [American Society of Anesthesiologists] 1, 2, 5

Fetal Monitoring

• Recording the fetal heart rate during the perianesthetic period reduces fetal and neonatal complications. [American Society of Anesthesiologists] 4

Special Populations Requiring Early Epidural Placement

• Early insertion of a neuraxial catheter should be considered for obstetric or anesthetic indications (e.g., twin gestation, preeclampsia, anticipated difficult airway, obesity, trial of vaginal birth after cesarean) to reduce the need for general anesthesia in emergent situations. [American Society of Anesthesiologists] 1, 5
• In these cases, catheter placement may precede the onset of labor or the patient’s request for analgesia. [American Society of Anesthesiologists] 1, 5

Technique Selection

Continuous Epidural Infusion

• Continuous epidural infusion provides effective labor analgesia. [American Society of Anesthesiologists] 1, 2
• When using local anesthetic infusion, add an opioid to lower the local‑anesthetic concentration, improve analgesic quality, and minimize motor block. [American Society of Anesthesiologists] 1, 2
• Recommended concentrations: dilute bupivacaine or ropivacaine (0.1 %–0.125 %) combined with fentanyl 2–2.5 µg/mL to achieve minimal motor block. [American Society of Anesthesiologists] 1

Single‑Injection Spinal

• Single‑injection spinal opioids (with or without low‑dose local anesthetic) can provide effective analgesia for approximately 1.5–2 hours when a spontaneous vaginal delivery is anticipated. [American Society of Anesthesiologists] 1, 5
• If labor is expected to exceed the analgesic duration or operative delivery is possible, a catheter technique should be chosen instead of a single‑injection spinal. [American Society of Anesthesiologists] 1, 5
• Use pencil‑point spinal needles rather than cutting‑bevel needles to reduce the risk of post‑dural puncture headache. [American Society of Anesthesiologists] 1

Resources, Equipment, & Monitoring

• When neuraxial techniques that include local anesthetics are used, ensure immediate availability of resources to treat hypotension, local‑anesthetic systemic toxicity, and high spinal anesthesia. [American Society of Anesthesiologists] 5
• If an opioid is added, have treatments for pruritus, nausea, and respiratory depression readily available. [American Society of Anesthesiologists] 5
• Basic and advanced life‑support equipment must be immediately accessible in the operative area of labor and delivery units. [American Society of Anesthesiologists] 6

Common Pitfalls to Avoid

• Do not withhold neuraxial analgesia based on arbitrary cervical‑dilation thresholds. [American Society of Anesthesiologists] 1
• Do not require a prophylactic fluid bolus before epidural placement in uncomplicated patients. [American Society of Anesthesiologists] 5
• Avoid high‑concentration local‑anesthetic solutions without opioids, as they increase motor block without improving analgesia. [American Society of Anesthesiologists] 1
• Do not use a single‑injection spinal technique when labor is expected to last longer than 1.5–2 hours or when operative delivery is possible; opt for a catheter technique instead. [American Society of Anesthesiologists] 1, 5

Consent & Capacity Considerations

• Drugs, fatigue, pain, or anxiety may compromise decision‑making capacity, but incapacity is only declared when the compromise is severe. [Anaesthesia] 7
• Labor is not the appropriate time to overwhelm women with excessive information; obstetric units should provide education about pain‑relief options early in pregnancy. [Anaesthesia] 7
• At the time of the procedure, patients must receive appropriate information, and the discussion must be documented. [Anaesthesia] 7
• Women with decision‑making capacity who request epidural analgesia during labor—even if a prior birth‑plan recorded a refusal—must have their request honored. [Anaesthesia] 7

Epidural Placement During Labor

General Recommendations

• The American Society of Anesthesiologists recommends that epidural analgesia should be offered to laboring patients on an individualized basis regardless of cervical dilation, and should not be withheld based on achieving an arbitrary cervical dilation 8, 9, 10
• Epidural analgesia should be offered to patients in early labor (less than 5 cm dilation) when this service is available 11, 8, 9
• Patients can be reassured that the use of neuraxial analgesia does not increase the incidence of cesarean delivery 8, 9, 12
• The timing of epidural placement should be based on the patient's request for pain relief rather than cervical dilation 11, 10
• Meta-analyses show equivocal findings for spontaneous, instrumented, and cesarean delivery when comparing early administration (cervical dilations <4-5 cm) with late administration (cervical dilations >4-5 cm) 11, 13

Special Considerations

• For patients with complicated pregnancies or anesthetic risk factors, early insertion of a neuraxial catheter should be considered 8, 9, 10
• In these cases, insertion of a neuraxial catheter may precede the onset of labor or the patient's request for labor analgesia 8, 12
• For patients attempting vaginal birth after previous cesarean delivery, neuraxial techniques should be offered, with consideration for early placement of a neuraxial catheter 11, 13, 12

Technical Considerations

• Continuous epidural infusion may be used for effective analgesia for labor and delivery 8, 9
• When continuous epidural infusion of local anesthetic is selected, an opioid may be added to reduce the concentration of local anesthetic, improve the quality of analgesia, and minimize motor block 8, 9, 10
• Use dilute concentrations of local anesthetics with opioids to produce as little motor block as possible 8, 9
• Patient-controlled epidural analgesia (PCEA) may provide an effective and flexible approach for maintenance of labor analgesia 12

Potential Complications and Management

• An intravenous infusion should be established before initiating neuraxial analgesia and maintained throughout its duration 12
• Equipment, facilities, and support personnel available in the labor and delivery suite should be comparable to those available in the main operating suite 8, 9
• Resources for treatment of potential complications should be available in the labor and delivery operating suite 8, 9

Practical Algorithm

• Offer epidural when the patient requests pain relief, regardless of cervical dilation 11, 8, 9
• Identify patients who might benefit from early epidural placement (complicated pregnancies, difficult airways, obesity) 8, 10
• Establish IV access and ensure appropriate monitoring 12
• Choose appropriate technique (continuous infusion, PCEA, combined spinal-epidural) based on labor status and anticipated delivery timing 8, 9
• Maintain vigilance for complications and adjust analgesia as needed throughout labor 8, 12