Pre-Medication and Immediate Pre-Operative Checklist

Introduction to Pre-Operative Preparation in Midwifery

Surgical procedures in obstetric and gynecological practice, such as an emergency or elective Caesarean section, demand meticulous preparation. Pre-operative care bridges the gap between the decision for surgery and the actual incision. As midwives in Nigeria, our goal is to minimize surgical risks, detect baseline abnormalities early, and prepare both mother and baby for a safe intra-operative and post-operative course. A structured approach prevents costly oversights in busy labor wards.

Pharmacological Agents Used in Pre-Medication

Pre-medications are administered prior to surgery to achieve specific physiological and psychological goals. The choice of drug depends on the planned anesthesia, the urgency of the procedure, and maternal clinical status.

• Antacids: Neutralize existing gastric acid to reduce the risk of acid aspiration pneumonitis (Mendelson's syndrome), which is a major hazard during obstetric general anesthesia.
• H2 Receptor Antagonists: Drugs like cimetidine or ranitidine decrease gastric acid volume and acidity.
• Prokinetic Agents: Metoclopramide enhances gastric emptying and increases lower esophageal sphincter tone.
• Sedatives/Anxiolytics: Benzodiazepines like diazepam reduce preoperative anxiety, though they must be used cautiously if fetal depression is a concern.

Verifying Informed Consent and Legal Requirements

Informed consent is both a legal and ethical prerequisite for any surgical intervention. The midwife must ensure that the obstetrician or surgeon has clearly explained the procedure, risks, benefits, and alternatives to the patient.

1. Voluntary Participation: The patient must agree without coercion from family members or medical staff.
2. Mental Capacity: The mother must be of sound mind and not excessively altered by heavy sedation or severe distress.
3. Documentation: The consent form must be duly signed, dated, and countersigned by a witness before any pre-operative sedative is given.

Physical Preparation and Hygiene on the Day of Surgery

Physical preparation aims to minimize surgical site infections and reduce mechanical obstacles during the operation. Midwives must systematically check several hygiene and physiological parameters:

• Skin Preparation: Clean the surgical site thoroughly. Avoid routine razor shaving unless strictly necessary, as micro-abrasions increase infection risks; clipping is preferred.
• Bladder Care: Insert an indwelling urinary catheter when indicated, typically just before theatre transfer, to keep the bladder empty and prevent accidental trauma.
• Fastin Status: Confirm compliance with nil-per-os (NPO) guidelines to minimize aspiration risks.
• Removal of Valuables: Remove dentures, contact lenses, jewelry, and nail polish, which interferes with pulse oximetry readings.

Psychological Support and Anxiety Management

Surgical procedures, especially unexpected emergency Caesarean sections, trigger intense fear and anxiety for expectant mothers and their families. Midwives provide vital emotional presence by explaining each step calmly, answering questions honestly, and reassuring the mother about her safety and her baby's welfare. Involving a supportive partner or relative in the pre-operative briefing helps alleviate isolation and fosters emotional stability.

Immediate Pre-Operative Checklist and Handoff Communication

The final moments before transfer to the operating theatre require a rigorous, systematic checklist. Midwives must verify that all identification bands are correct, case notes and charts are complete, and baseline vital signs are recorded.

The handoff communication to the theatre scrub nurse or anesthetist must be structured, using tools like SBAR (Situation, Background, Assessment, Recommendation) to communicate critical data such as known allergies, blood group and crossmatch status, and the exact time of the last oral intake.