Theatre Technique in Nursing: Operating Room Principles, Roles, Sterility and Patient Safety

Add a suitable image of an operating theatre team preparing safely for surgery here.

Learning objectives

• Define an operating theatre and explain the aims of theatre technique.
• Describe theatre zones, environmental controls, team roles and patient flow.
• Apply surgical asepsis, hand preparation, sterile gowning, gloving and sterile-field principles.
• Explain patient identification, consent, site marking, positioning, counts and the WHO Surgical Safety Checklist.
• Describe safe handling of instruments, specimens, sharps, electrosurgical equipment and medicines.
• Recognise common theatre hazards and outline responses to fire, equipment failure, bleeding and anaesthetic emergencies.
• Document and hand over perioperative care accurately.

1. Meaning and aims of theatre technique

The operating theatre or operating room is a controlled clinical area where invasive procedures are performed using specialised equipment, trained personnel and strict infection-prevention measures. Theatre technique is the disciplined set of methods used to keep the patient, team, instruments and environment safe throughout the perioperative period.

The main aims are to:

• Protect the patient from wrong-person, wrong-procedure and wrong-site surgery.
• Prevent surgical-site infection and transmission of blood-borne or environmental pathogens.
• Maintain a sterile field and prevent contamination of instruments, wounds and implants.
• Support safe anaesthesia, positioning, monitoring, haemostasis and recovery.
• Promote teamwork, clear communication and early recognition of deterioration.
• Protect staff from sharps injuries, chemicals, radiation, smoke, fire, manual-handling injuries and infection.
• Ensure traceability of implants, medicines, specimens, counts and events.

2. Theatre layout and zones

Exact layouts vary by facility, but zoning controls movement, clothing, traffic and contamination.

Keep doors closed as far as practical, limit unnecessary personnel and avoid opening sterile packs long before they are needed. Clean and dirty flows should be separated according to facility design.

3. Operating theatre team and responsibilities

Surgeon or procedural clinician

• Confirms indication, consent, patient identity, procedure and operative site.
• Performs the procedure, leads the briefing and communicates changes or complications.
• Ensures specimens are correctly identified and provides postoperative instructions.

Anaesthesia provider

• Assesses the patient, explains anaesthesia, confirms consent and checks allergies and risks.
• Prepares airway, breathing, circulation, monitoring, medicines and emergency equipment.
• Maintains physiological stability, communicates blood loss and transfers the patient safely to recovery.

Scrub nurse or scrub practitioner

• Performs surgical hand preparation, dons sterile attire and prepares the sterile field.
• Checks instruments, sutures, swabs, needles, implants and equipment before the procedure.
• Passes instruments safely, anticipates the procedure and maintains asepsis.
• Performs counts with the circulating nurse and reports discrepancies immediately.

Circulating nurse

• Coordinates the room, checks patient identity and documentation, and supports the sterile team without becoming sterile.
• Records times, medicines, specimens, implants, counts, equipment and significant events.
• Obtains additional supplies, protects the patient from injury and communicates with people outside the room.
• Participates in the briefing, time-out, sign-out and postoperative handover.

Other team members

Depending on the procedure, the team may include an operating department assistant, technician, radiographer, perfusionist, student, porter, cleaner and specialist implant representative. Everyone must know their role, follow local policy and speak up about a safety concern.

4. Preparing the theatre

Environmental preparation

• Confirm the room is clean, functional, uncluttered and supplied for the planned procedure.
• Check lighting, operating table, suction, oxygen, power, diathermy, warming devices, monitors and emergency call systems.
• Check that sterile packs are intact, dry, in date and have an acceptable indicator result.
• Prepare sharps containers, waste containers, specimen pots, labels, forms and spill-management materials.
• Check emergency equipment, airway devices, resuscitation medicines, blood-collection supplies and backup power according to policy.
• Remove unnecessary equipment and reduce traffic, conversation and door opening.

Patient and procedure preparation

• Confirm identity using approved identifiers and match the wristband, record, consent and theatre list.
• Confirm procedure, site, side, allergies, fasting status, medicines, relevant investigations, blood availability and special equipment.
• Check that the patient has removed unsafe jewellery, dentures, contact lenses or removable prostheses as indicated, while preserving dignity and documenting valuables.
• Assess skin, pressure-injury risk, mobility, pain, anxiety, pregnancy possibility and communication needs.
• Provide privacy, explain what will happen, answer questions within scope and report concerns before anaesthesia.

5. Surgical asepsis and the sterile field

Surgical asepsis means preventing the introduction of microorganisms into a sterile site. A sterile field contains sterile items and surfaces that are required for the procedure. Asepsis is maintained by behaviour, preparation, equipment, environment and constant awareness—not by gloves alone.

Core principles

• Only sterile items may touch the sterile field, sterile instruments, the prepared incision or sterile gloves.
• A sterile item becomes contaminated if it touches an unsterile item, falls below the field, becomes wet through or is exposed beyond the permitted time according to policy.
• The outside of a sterile package is not sterile; open it without reaching over the contents.
• Keep sterile hands in sight and above waist level; do not turn your back on an exposed sterile field.
• Face sterile areas when passing and maintain safe distance from unsterile people.
• Do not reach over a sterile field. Pass around it or ask for the needed item.
• When in doubt, treat an item as contaminated and replace it.
• Minimise movement, talking and unnecessary personnel to reduce airborne contamination.

Surgical hand preparation

1. Remove rings, watches and bracelets; keep nails short and free of artificial nails or chipped polish.
2. Inspect hands and forearms for cuts or skin problems and report any condition that prevents safe practice.
3. Use the facility-approved surgical hand antisepsis product and follow its contact time and technique.
4. Keep hands higher than elbows during rinsing so water flows from the cleanest area toward the less clean area.
5. Dry with a sterile towel from fingertips toward the elbow, using a separate area of the towel for each limb.
6. Don sterile gown and gloves without contaminating them.

Gowning and gloving

• Inspect the gown and glove packages before opening.
• Touch only the inside of the gown and avoid contact with unsterile surfaces.
• Use closed-gloving when possible after gowning; use open-gloving only when appropriate to the situation and policy.
• Keep the sterile front of the gown from chest to table level and the sleeves within the sterile boundaries defined by policy.
• Change gloves immediately after a suspected contamination or puncture and report sharps injuries.

6. Skin preparation, draping and incision safety

• Confirm allergies and sensitivities to antiseptics, adhesives, latex and dressings.
• Use the approved antiseptic, correct concentration and adequate contact time; allow the solution to dry.
• Prevent pooling of alcohol-containing solution beneath the patient, especially near diathermy pads or oxygen sources.
• Prepare from the cleanest area outward using the prescribed direction and a new swab when required.
• Use sterile drapes to create a controlled field; do not move drapes after placement unless the sterile team manages the change.
• Cover exposed hair and protect the patient from heat loss, pressure and unnecessary exposure.

7. Patient positioning and prevention of injury

Positioning provides surgical access while protecting breathing, circulation, nerves, skin, eyes and joints. Confirm the planned position during the briefing and document the final position.

Before incision, check alignment, padding, straps, pressure points, warming, grounding pads, tubing, lines, urinary catheter and the ability to access the airway and emergency equipment.

8. Patient identification, consent and the surgical safety checklist

Use the WHO Surgical Safety Checklist or the approved local equivalent. It supports communication and catches predictable errors at three critical moments.

Any team member may stop the procedure to clarify a discrepancy. A checklist is not a tick-box exercise; the team must speak, listen and resolve concerns.

9. Instruments, supplies and safe passing

• Know the names, uses, handling and hazards of common instruments before the procedure.
• Inspect instruments for cleanliness, function, damage and insulation defects.
• Arrange instruments in a logical sequence and keep tips visible and protected.
• Pass sharp instruments using a neutral zone or hand-to-hand method according to policy; announce dangerous points.
• Keep cords, suction tubing and irrigation lines organised to prevent disconnection or trips.
• Use only approved equipment and report malfunction rather than improvising a repair.
• Keep medication labels visible and never accept an unlabeled syringe or bowl.

10. Counts and retained-item prevention

Counts are a shared safety responsibility of the scrub and circulating practitioners. Count according to local policy before the procedure, before closure of a cavity, before wound closure and at the end of the procedure; perform additional counts after staff change or when a discrepancy is suspected.

• Count swabs, sponges, needles, blades, instruments and other countable items audibly and visibly.
• Record the count and communicate the result to the surgeon before closure.
• If incorrect, keep the patient and field under control, repeat the count, search the field, waste, floor, linen and equipment, and inform the surgeon and senior nurse immediately.
• Follow the facility escalation and imaging policy; do not silently accept an unexplained discrepancy.
• Document the discrepancy, search, notifications and final resolution.

11. Specimen handling

1. Confirm the specimen type, site and patient identifiers with the surgeon and circulating nurse.
2. Place the specimen in the correct container and use the correct medium; do not place a specimen in formalin when fresh tissue or another medium is required.
3. Label immediately at the point of collection, not later from memory.
4. Read the label aloud and match it with the request form and patient record.
5. State whether the specimen is urgent, for culture, histology or another test.
6. Document dispatch, recipient and any special transport requirements.

12. Medicines, fluids and equipment safety

• Check medicine name, strength, dose, route, patient, indication, expiry, allergies and label each prepared syringe or bowl.
• Use aseptic technique when accessing vials, preparing injections or connecting infusions.
• Confirm antibiotic prophylaxis timing and redose requirements according to the prescriber’s order and local guideline.
• Check irrigation fluids and warmed fluids for correct identity, sterility and temperature.
• Use diathermy safely: inspect the patient return electrode, place it on clean dry skin over a well-perfused muscle area, keep the skin dry and avoid pathways through implanted devices according to policy.
• Manage surgical smoke using local ventilation or smoke evacuation when available.
• Use radiation protection for fluoroscopy: time, distance, shielding, dosimetry and pregnancy precautions.

13. Infection prevention and theatre cleaning

• Perform hand hygiene at the indicated moments and use appropriate personal protective equipment.
• Keep sterile and contaminated equipment separate and transport used instruments in closed, safe containers.
• Clean and disinfect surfaces and equipment between procedures according to the facility schedule and product instructions.
• Use approved sterilisation and high-level disinfection processes; do not use an item if the pack is wet, torn, open or the indicator is unacceptable.
• Manage blood and body-fluid spills promptly with approved procedures and PPE.
• Segregate sharps, infectious waste, pathological waste, pharmaceutical waste and general waste at the point of generation.
• Report needlestick injuries, splash exposures, breaks in asepsis and suspected surgical-site infection through the facility system.

14. Common theatre emergencies and immediate priorities

Follow the local emergency protocol and call for help early. The team should maintain basic life-support competence and know where emergency equipment is kept.

Major bleeding

• Announce the concern, call for senior surgical and anaesthetic assistance and maintain airway, breathing and circulation.
• Provide suction, pressure, instruments, large-bore access, blood samples and warmed fluids or blood products as prescribed.
• Record estimated blood loss, fluids, blood products, medicines, vital signs and responses.

Anaesthetic or airway emergency

• Call the anaesthesia team and emergency response, provide oxygen and support airway management within role.
• Check connections, oxygen supply, suction, breathing circuit and monitors while the anaesthesia provider leads clinical treatment.
• Prepare emergency medicines and equipment as directed and document the event.

Theatre fire

• Raise the alarm, stop the procedure if possible and remove the patient from danger according to the facility fire plan.
• Stop oxygen or fuel sources only when safe, use the correct extinguisher and evacuate as directed.
• Protect the airway and wounds, account for staff and patients, and report the incident.

Malignant hyperthermia or severe reaction

Recognise rapidly rising carbon dioxide, muscle rigidity, tachycardia, hyperthermia or unexplained instability as an anaesthetic emergency. Call for help, stop triggering agents as directed, obtain the emergency treatment trolley and support cooling and resuscitation under the anaesthesia team’s leadership.

15. Recovery and postoperative handover

Handover should be structured and face-to-face whenever possible. Include:

• Patient identity, procedure, anaesthetic, allergies and relevant history.
• Airway and breathing status, oxygen therapy, circulation, consciousness, pain and temperature.
• Blood loss, fluids, blood products, medicines and urine output.
• Wound, drains, dressings, casts, catheters, lines and pressure-injury concerns.
• Specimens sent, implants used, counts, equipment problems and intraoperative complications.
• Surgeon’s orders, restrictions, observations, warning signs and who should be contacted.

Do not leave an unstable patient without an appropriate handover and receiving professional. Reassess pain, nausea, airway, circulation, temperature, wound and level of consciousness according to recovery policy.

16. Professional behaviours in theatre

• Arrive prepared, punctual and appropriately dressed.
• Speak clearly and respectfully; never silence a safety concern because of hierarchy.
• Protect patient dignity when transferring, positioning, exposing or discussing the patient.
• Do not use mobile phones, take photographs or discuss patient details outside authorised systems.
• Teach students and visitors without compromising sterility or patient safety.
• Report near misses as learning opportunities rather than hiding them.

17. Worked scenarios

Scenario 1: Wrong-side discrepancy

The consent form and theatre list indicate the left side, but the patient states the right side. Stop the preparation, keep the patient safe, inform the surgeon and anaesthesia provider, verify the record and consent, and resolve the discrepancy before proceeding. Never rely on a hurried verbal assumption.

Scenario 2: Missing needle at final count

Announce the discrepancy immediately. Keep the room and field controlled, repeat the count, search the sterile field, waste, floor, linen and equipment, inform the surgeon, follow the local imaging/escalation protocol and document everything. Do not wait until the patient leaves the theatre.

Scenario 3: Wet sterile pack

A wet pack is considered contaminated because moisture can allow microorganisms to pass through packaging. Remove it from use, obtain a dry sterile replacement and report repeated storage or sterilisation problems.

Scenario 4: Pressure area noticed after positioning

Tell the team before incision, reassess the position and padding, protect the area and document the assessment. Do not wait until the end of a long procedure when injury may have progressed.

18. Revision questions

1. Define theatre technique and state its aims.
2. Describe unrestricted, semi-restricted and restricted theatre zones.
3. Discuss the roles of the scrub nurse and circulating nurse.
4. Explain eight principles of surgical asepsis.
5. Describe surgical hand preparation, gowning and gloving.
6. Explain the three stages of the WHO Surgical Safety Checklist.
7. Outline safe patient positioning and prevention of pressure and nerve injury.
8. Describe the procedure for instrument, swab and needle counts.
9. Explain how specimens should be labelled and transported.
10. Discuss immediate actions for major bleeding, airway emergency and theatre fire.
11. Outline the information required during handover to recovery.
12. Explain why a wet sterile pack must not be used.

Key takeaways

• Theatre safety is a team responsibility built on identification, consent, asepsis, communication and reliable checks.
• When sterility or a count is in doubt, stop and resolve the concern; never work around an unexplained risk.
• Positioning, equipment, medicines, specimens and documentation are as important as instrument handling.
• The WHO checklist works when the team speaks, listens and acts on concerns.
• Safe recovery begins with a complete, structured handover.

Suggested references

1. World Health Organization. WHO Surgical Safety Checklist and implementation resources.
2. World Health Organization. Global guidelines for the prevention of surgical site infection. 2nd ed.; 2018.
3. Relevant Uganda Ministry of Health infection-prevention, operating-theatre, waste-management and patient-safety policies.
4. Facility surgical safety checklist, instrument-count policy, specimen policy and emergency procedures.