English for Theatre Nursing: Essential Vocabulary & Phrases
Theatre nursing demands precise, confident English—whether you're calling a time out, passing instruments, documenting a count, or handing over a patient in recovery. This guide covers 48 essential terms across 6 categories: scrub technique and sterility, surgical instruments, WHO surgical safety checklist, perioperative monitoring, recovery room nursing, and minimally invasive surgery.
48 terms · 6 topics
"surgical scrub"
The process of thoroughly washing and decontaminating the hands and forearms with an antiseptic agent before entering the operating theatre sterile field, using either a timed or counted-stroke technique
"The scrub nurse performed a five-minute surgical scrub with chlorhexidine gluconate before gowning and gloving for the laparotomy."
"sterile field"
A specifically prepared area of defined, microorganism-free space around the operative site, maintained by all theatre personnel to prevent surgical site infection
"The circulating nurse reminded the student nurse never to reach across the sterile field when passing instruments to the scrub nurse."
"gowning and gloving"
The process of donning a sterile surgical gown and sterile gloves using aseptic technique to protect both the patient and the wearer from contamination
"After gowning and gloving, the scrub nurse moved to the instrument trolley and began arranging the equipment for the laparoscopic cholecystectomy."
"instrument count"
A systematic verification by the scrub and circulating nurses of all surgical instruments, sharps, and sponges before, during, and after an operation to prevent retained foreign bodies
"The instrument count was performed before skin closure and an incorrect swab count prompted the surgeon to pause and search the cavity before proceeding."
"strike-through contamination"
The passage of microorganisms from a non-sterile surface through a wet or punctured sterile barrier, rendering the previously sterile item no longer considered aseptic
"A saline spill soaking through the sterile drape caused strike-through contamination and required immediate replacement of the affected section of the sterile field."
"circulating nurse"
The operating theatre nurse who works outside the sterile field, managing the environment, obtaining supplies, documenting care, and supporting the scrub team throughout the procedure
"The circulating nurse confirmed the patient identity, procedure, and site before the surgeon made the incision in accordance with the WHO checklist."
"aseptic technique"
A set of practices designed to prevent contamination of sterile equipment, wounds, and body cavities by pathogenic microorganisms during surgical or invasive procedures
"The scrub nurse challenged the surgical trainee on aseptic technique after observing the trainee touch a non-sterile surface without changing gloves."
"opening sterile packs"
The procedure for presenting sterile-packaged items to the scrub nurse without contaminating their contents, performed by the circulating nurse using specific peeling and folding techniques
"The circulating nurse carefully peeled back the outer wrapper when opening sterile packs containing the suture material, ensuring the inner packaging remained uncontaminated."
"retractor"
A surgical instrument used to hold back tissues, organs, or wound edges to maintain exposure of the operative site; available as self-retaining or hand-held types
"The scrub nurse passed a Deaver retractor to the assistant surgeon to improve visualisation of the liver during the open cholecystectomy."
"diathermy"
Electrosurgical equipment that uses high-frequency electrical current to cut tissue or coagulate bleeding vessels; commonly referred to as electrocautery or the bovie in clinical practice
"The surgeon requested the diathermy on coagulation mode to seal the bleeding vessel before proceeding with the dissection."
"artery forceps"
Locking clamp instruments used to occlude blood vessels, grasp tissue, or secure drains and tubes; classified by jaw configuration as straight (Rochester) or curved (Crile or Kelly)
"The scrub nurse loaded the artery forceps with the ligature suture and passed them to the surgeon to tie off the mesenteric vessel."
"needle holder"
A locking surgical instrument with textured jaws designed to grasp and drive a curved suture needle through tissue during wound closure or anastomosis
"The surgeon requested a Mayo needle holder loaded with a 2-0 Vicryl suture on a round-bodied needle for closure of the fascial layer."
"suction tip"
A rigid or flexible cannula connected to a vacuum source used to aspirate blood, irrigation fluid, and debris from the operative field to maintain visibility
"The scrub nurse kept the Yankauer suction tip clear and ready throughout the procedure so the surgeon could maintain a dry operative field."
"tissue scissors"
Surgical scissors specifically designed for cutting delicate tissues; Metzenbaum scissors are used for fine dissection while Mayo scissors handle heavier, more fibrous structures
"The surgeon asked for Metzenbaum tissue scissors to carefully dissect around the common bile duct without damaging the surrounding structures."
"pledget"
A small compressed sponge or gauze material used to tamponade bleeding points, absorb fluid, or protect tissues; must be accounted for in the swab count
"The surgeon placed a pledget soaked in adrenaline solution against the oozing cavity wall while the anaesthetist adjusted the blood pressure."
"laparoscopic trocar"
A sharp or blunt-tipped cannula inserted through the abdominal wall to provide a port of entry for laparoscopic instruments and insufflation gas during minimally invasive surgery
"The scrub nurse assembled and checked the laparoscopic trocar assemblies before passing them to the surgeon for abdominal wall insertion."
"sign in"
The first phase of the WHO Surgical Safety Checklist completed before anaesthetic induction, confirming patient identity, consent, site marking, allergy status, and anaesthetic equipment checks
"During the sign in the anaesthetic nurse confirmed the patient had fasted for six hours and had no known drug allergies before induction commenced."
"time out"
The second phase of the WHO checklist performed immediately before skin incision, in which the entire team pauses to verbally confirm patient identity, procedure, site, side, and anticipated critical events
"The scrub nurse called for a time out and the whole team paused while each member confirmed their name, role, and understanding of the planned operation."
"sign out"
The third and final phase of the WHO checklist completed before the patient leaves the theatre, confirming counts are correct, specimens are labelled, and key recovery concerns are communicated
"At sign out the circulating nurse confirmed all swab and instrument counts were correct and that the pathology specimen was labelled with the correct patient sticker."
"site marking"
The pre-operative process of clearly marking the intended surgical site with an indelible pen, usually by the operating surgeon, to prevent wrong-site or wrong-side operations
"The surgeon completed site marking on the right knee with a permanent marker while the patient was awake and able to confirm the correct side."
"anticipated critical events"
A component of the WHO time out during which the surgeon, anaesthetist, and nursing team each briefly share any foreseen technical difficulties, blood loss concerns, or equipment requirements for the procedure
"During the discussion of anticipated critical events the surgeon warned the team that significant intraoperative bleeding was possible given the patient's previous abdominal surgery."
"wrong-site surgery"
A surgical never event in which an operation is performed on the incorrect body part, limb, or patient, preventable through rigorous application of the WHO checklist and site marking protocols
"The hospital conducted a root-cause analysis after a near-miss event to identify the process failure that nearly resulted in wrong-site surgery on a paediatric patient."
"patient identity verification"
The process of confirming the correct patient using at least two identifiers such as full name and date of birth, mandatory at every stage of the surgical pathway to prevent misidentification
"Patient identity verification was carried out at the ward, in the anaesthetic room, and again during the time out to ensure three separate confirmation points."
"specimen labelling"
The immediate and accurate identification of any tissue, fluid, or other material removed during surgery with the patient's name, date of birth, date, and site before dispatch to pathology
"The scrub nurse reminded the surgeon to dictate the exact anatomical site for specimen labelling before the gallbladder was placed in the pathology container."
"intraoperative monitoring"
The continuous measurement and recording of physiological parameters such as heart rate, blood pressure, oxygen saturation, end-tidal CO2, and temperature throughout a surgical procedure
"The anaesthetic nurse documented intraoperative monitoring values every five minutes on the anaesthetic chart throughout the three-hour procedure."
"end-tidal CO2"
The concentration of carbon dioxide measured in exhaled air at the end of each breath, used to confirm correct endotracheal tube placement and assess the adequacy of ventilation and circulation
"A sudden drop in end-tidal CO2 prompted the anaesthetist to suspect pulmonary embolism and immediately review the patient's haemodynamic status."
"mean arterial pressure"
The average arterial pressure throughout one cardiac cycle, calculated from systolic and diastolic blood pressure values; a MAP above 65 mmHg is generally maintained to ensure adequate organ perfusion
"The anaesthetic nurse titrated the vasopressor infusion to maintain a mean arterial pressure above 65 mmHg as requested by the anaesthetic consultant."
"oxygen saturation"
The percentage of haemoglobin molecules in arterial blood that are carrying oxygen, measured non-invasively by pulse oximetry and normally maintained at 95% or above under anaesthesia
"Oxygen saturation dropped to 88% during positioning and the anaesthetist immediately increased inspired oxygen concentration and adjusted ventilator settings."
"neuromuscular blockade"
The pharmacological paralysis of voluntary muscles achieved with agents such as rocuronium or vecuronium to facilitate intubation and optimise surgical access during general anaesthesia
"The anaesthetic nurse prepared a syringe of sugammadex for reversal of neuromuscular blockade at the end of the procedure before the patient was transferred to recovery."
"fluid balance"
The running total of all fluids administered to the patient intravenously or orally minus all measurable losses including urine output, blood loss, and drain outputs during a procedure
"The circulating nurse maintained a meticulous fluid balance chart and reported a positive balance of 1,200 mL to the anaesthetist after two hours of surgery."
"arterial line"
An indwelling catheter placed in a peripheral artery, usually the radial artery, providing continuous beat-to-beat blood pressure monitoring and easy access for arterial blood gas sampling in high-risk procedures
"The anaesthetic nurse zeroed and calibrated the arterial line transducer at the level of the patient's right atrium before the aortic valve replacement commenced."
"temperature management"
Deliberate measures taken in the perioperative period to prevent or treat hypothermia or, less commonly, targeted hyperthermia, including warm air blankets, fluid warmers, and continuous temperature monitoring
"Temperature management protocols including a forced-air warming blanket and warmed intravenous fluids were applied from anaesthetic induction to prevent perioperative hypothermia."
"post-anaesthesia care unit"
The specialised recovery area, also called the recovery room or PACU, where patients are closely monitored and stabilised immediately after surgery until they meet criteria for ward or ICU transfer
"The patient arrived in the post-anaesthesia care unit with an oxygen mask in place and was transferred to a recovery nurse who commenced one-to-one observation."
"emergence agitation"
A state of confusion, agitation, and combativeness occurring during recovery from general anaesthesia, more common in children and patients who have received certain volatile anaesthetic agents
"The recovery nurse requested the anaesthetist review a patient with emergence agitation who was attempting to remove his endotracheal tube before adequate reversal was achieved."
"Aldrete score"
A standardised scoring system assessing five parameters—activity, respiration, circulation, consciousness, and oxygen saturation—used to determine readiness for discharge from the post-anaesthesia care unit
"The patient achieved an Aldrete score of nine out of ten thirty minutes after surgery, meeting the criteria for transfer to the surgical ward."
"pain assessment"
The systematic evaluation of post-operative pain intensity, character, and location using validated tools such as the numeric rating scale or visual analogue scale to guide analgesic administration
"The recovery nurse performed a pain assessment every fifteen minutes and titrated intravenous morphine to keep the patient's numeric rating scale score below four out of ten."
"post-operative nausea and vomiting"
Nausea and vomiting occurring in the post-operative period, a common complication of general anaesthesia requiring prophylaxis and treatment to prevent discomfort, aspiration, and delayed discharge
"The patient scored high on the Apfel risk assessment for post-operative nausea and vomiting and received prophylactic ondansetron and dexamethasone before emergence."
"oxygen therapy"
The supplemental administration of oxygen via face mask, nasal cannula, or other device in the recovery room to maintain adequate saturation as anaesthetic agents are eliminated and protective reflexes return
"The recovery nurse applied a Hudson mask delivering 40% oxygen therapy and monitored the patient's saturation until it remained stable above 96% on room air."
"shivering"
Involuntary, rhythmic muscle contractions occurring after general or regional anaesthesia, primarily caused by hypothermia and contributing to increased oxygen consumption and patient discomfort
"Persistent shivering was treated with active warming and a small intravenous dose of pethidine while the recovery nurse monitored the patient's core temperature."
"handover to recovery"
The structured verbal communication from the anaesthetist and scrub or circulating nurse to the recovery nurse at the end of a procedure, covering the procedure performed, anaesthetic agents, intraoperative events, and post-operative instructions
"The anaesthetist gave handover to recovery using the SBAR framework, highlighting the patient's history of difficult airway and the need for close respiratory monitoring."
"laparoscopy"
A minimally invasive surgical technique in which a laparoscope is inserted through small abdominal ports to visualise and operate on intra-abdominal structures without a large open incision
"The patient was listed for a diagnostic laparoscopy to investigate chronic pelvic pain after conservative management had failed to identify a cause."
"pneumoperitoneum"
The inflation of the peritoneal cavity with carbon dioxide gas to create a working space between the abdominal wall and the internal organs during laparoscopic surgery
"The scrub nurse reminded the surgeon that the intraperitoneal pressure for pneumoperitoneum had been set to 12 mmHg in accordance with departmental protocol."
"insufflation"
The process of introducing CO2 gas into the peritoneal or other body cavity using an insufflator device to establish and maintain pneumoperitoneum during laparoscopic procedures
"The circulating nurse connected the CO2 tubing and set the flow rate on the insufflator before insufflation began, confirming correct assembly with the scrub nurse."
"Veress needle"
A spring-loaded needle used to gain initial blind access to the peritoneal cavity for insufflation of CO2, prior to insertion of the first trocar in laparoscopic surgery
"The surgeon used a Veress needle at the umbilicus to commence insufflation after confirming the absence of adhesions from prior abdominal surgery."
"port placement"
The strategic insertion of laparoscopic trocars through the abdominal wall at predetermined anatomical positions to optimise instrument triangulation and visualisation during minimally invasive surgery
"The scrub nurse provided a 10 mm trocar for the umbilical camera port and three 5 mm trocars for the working ports during laparoscopic port placement."
"robotic-assisted surgery"
A form of minimally invasive surgery in which the surgeon operates from a console using magnified three-dimensional vision and robotic instrument arms that translate hand movements into precise actions inside the patient
"The scrub nurse completed a specific training programme for robotic-assisted surgery before being cleared to independently set up the robotic system for urological procedures."
"conversion to open"
The decision during a laparoscopic or robotic procedure to abandon the minimally invasive approach and proceed with an open incision due to complications, poor visualisation, or technical difficulty
"The surgeon announced conversion to open after encountering dense adhesions that obscured the operative field and posed an unacceptable risk of bowel injury."
"clip applicator"
A surgical instrument used laparoscopically or in open surgery to apply titanium or polymer clips across ducts, vessels, or other tubular structures to achieve haemostasis or prevent bile or urine leakage
"The scrub nurse loaded a fresh cartridge into the clip applicator and passed it to the surgeon to secure the cystic duct before division during the cholecystectomy."
Frequently Asked Questions
What is the difference between the "scrub nurse" and the "circulating nurse" in theatre?
The scrub nurse works within the sterile field, gowned and gloved, and is directly responsible for handing instruments to the surgeon, maintaining the sterile instrument trolley, and performing swab and instrument counts. The circulating nurse works outside the sterile field, manages the environment, opens sterile packs, documents the procedure, communicates with the ward, and provides support to the scrub team without entering the sterile zone. In some countries or institutions these roles may be called the "scrub practitioner" and "scout nurse" respectively, but the functional distinction remains the same.
How do I correctly call a "time out" in English?
A time out is called by clearly stating "I am calling a time out—please stop all activity." You then systematically verify each item on the WHO checklist: patient identity ("Can we confirm the patient's name and date of birth?"), procedure ("We are performing a right total hip replacement"), site and side, any known allergies, anticipated critical events from the surgeon and anaesthetist, and the availability of required implants or special equipment. Every team member must verbally acknowledge each point. Close the time out by confirming all items have been checked before giving the surgeon permission to proceed with skin incision.
What does "pneumoperitoneum" mean and why is it important in theatre nursing?
"Pneumoperitoneum" refers to the inflation of the abdominal cavity with carbon dioxide gas to create the working space needed for laparoscopic surgery. The CO2 lifts the abdominal wall away from the internal organs, providing the surgeon with visualisation and instrument access through small ports. As a theatre nurse, you need to know the safe pressure range (typically 12–15 mmHg), how to set up and troubleshoot the insufflator, and to recognise complications such as subcutaneous emphysema or CO2 embolism. A sudden drop in end-tidal CO2 with haemodynamic instability is a red-flag finding.
What is the "Aldrete score" and when do I use it?
The Aldrete score is a post-anaesthesia discharge scoring tool that assesses five parameters: motor activity (0–2), respiration (0–2), circulation/blood pressure (0–2), level of consciousness (0–2), and oxygen saturation (0–2), giving a maximum score of ten. A score of nine or above is generally required before a patient can be discharged from the post-anaesthesia care unit (PACU) to the surgical ward. The score is reassessed at regular intervals—usually every 15 to 30 minutes—and all deviations are documented and escalated if necessary. A modified version called the Modified Aldrete Score includes a pain and emesis assessment.
How do I communicate an instrument count discrepancy in English?
If a count does not reconcile, you state clearly and calmly: "I have an incorrect count—I am missing one swab" (or "one artery forceps", etc.). Do not wait or recount silently. The surgeon must be informed immediately and the operative site must be methodically searched before wound closure. Document the discrepancy, the search process, the outcome, and the time in the operative notes. If the missing item is not found, an intraoperative X-ray is obtained. Use precise language: "The swab count at skin closure is incorrect by one" rather than vague phrases like "the count might be off." Clear, direct communication protects the patient and the team.
Hear these theatre nursing phrases used naturally by native English-speaking surgical teams—from instrument requests to safety briefings.
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