An OR nurse (operating room nurse), also called a perioperative or surgical nurse, is a registered nurse who cares for patients before, during and after surgery. OR nurses prepare patients for their procedures, protect the sterile field, hand instruments to surgeons, count every sponge and needle, run safety checks like the surgical time out and advocate for patients who are asleep and cannot speak for themselves. Every surgery in every hospital depends on them.
This guide covers what OR nurses do, circulating vs scrub nurses, RN first assistants, how OR nurses compare to surgical techs, the sterile field and surgical time out, how to become an OR nurse, CNOR certification, salary, surgical nurse practitioners and how to celebrate OR nurses during Perioperative Nurse Week.
In this guide
- What is an OR nurse?
- The three phases of perioperative nursing
- Circulating nurse vs scrub nurse
- What is an RN first assist (RNFA)?
- Scrub nurse vs surgical tech
- The sterile field and surgical time out
- How to become an OR nurse
- CNOR certification
- How much do OR nurses make?
- Surgical nurse practitioners
- What is it like to be an OR nurse?
- A short history of OR nursing
- When is Perioperative Nurse Week?
- Gifts for OR nurses
- OR nurse humor
- Frequently asked questions
What is an OR nurse?
OR nurses work in hospital operating rooms, ambulatory surgery centers and procedure suites. The terms OR nurse, operating room nurse, surgical nurse and perioperative nurse are often used interchangeably. Strictly speaking, "perioperative" covers the entire surgical experience, so perioperative nursing includes pre-op, the OR itself and recovery.
The most important part of the job is patient advocacy. Once a patient is under anesthesia, the OR nurse is the person responsible for making sure the right procedure happens on the right patient, the patient is positioned safely, nothing is left behind and the surgical team follows every safety standard.
The three phases of perioperative nursing
| Phase | Who | What nurses do |
|---|---|---|
| Preoperative (pre-op) | Pre-op nurse | Confirm history, allergies and consent, start IVs, mark and verify the surgical site, ease anxiety and prepare the patient for the OR |
| Intraoperative | Circulating nurse and scrub nurse | Run the room, maintain the sterile field, pass instruments, count supplies, document and advocate for the patient |
| Postoperative | PACU (recovery) nurse | Monitor airway, breathing, pain and vital signs as patients wake up from anesthesia |
Learn about the recovery nurses who pick up where the OR team leaves off in our complete guide to PACU nurses, and explore our PACU collection.
Circulating nurse vs scrub nurse
Inside the operating room, OR nurses usually take one of two roles:
| Circulating nurse | Scrub nurse | |
|---|---|---|
| Sterile? | No, works outside the sterile field | Yes, scrubbed in, gowned and gloved |
| Main job | Manages the whole room and advocates for the patient | Sets up sterile instruments and hands them to the surgeon |
| Typical tasks | Patient check-in, positioning, skin prep, leading the time out, opening supplies, documentation, specimen handling, communicating with family and other departments | Setting up the back table, anticipating the surgeon's next instrument, keeping the field sterile, counting with the circulator |
| Who can do it | Must be a registered nurse in most states | A registered nurse or a surgical technologist |
Many OR nurses learn both roles, and the circulating nurse is often described as the "air traffic controller" of the operating room.
What is an RN first assist (RNFA)?
An RN first assistant (RNFA) is an experienced perioperative nurse with advanced training who directly assists the surgeon during surgery. RNFAs help with exposure, retraction, suctioning, controlling bleeding and closing incisions, working right next to the surgeon at the table.
RNFAs typically complete a formal RNFA education program after gaining OR experience and holding the CNOR. Many then earn the CRNFA (Certified Registered Nurse First Assistant) credential through the Competency and Credentialing Institute (CCI). Scope of practice for RNFAs varies by state and facility.
Scrub nurse vs surgical tech
Surgical technologists (surgical techs) often fill the scrub role, which is why people confuse the two:
- Scrub nurse: a registered nurse with a nursing license who can scrub or circulate, assess patients and give medications.
- Surgical tech: a trained surgical technologist, usually through a certificate or associate program, who scrubs in, sets up instruments and assists the surgeon. Techs cannot circulate in most states or give medications, and many hold the CST credential.
Surgical techs and OR nurses work as a team in nearly every operating room, and many techs later go to nursing school.
The sterile field and surgical time out
What is the sterile field?
The sterile field is the area around the surgical site, including the draped patient, the instrument tables and the gowned team, that must stay free of microorganisms. OR nurses protect it constantly. If anything becomes contaminated, it gets replaced. OR nurses are famous for speaking up when a break in sterility happens, no matter who caused it.
What is the surgical time out?
A time out is a pause right before the first incision when the entire team stops and confirms the correct patient, procedure, site and side. It is part of The Joint Commission's Universal Protocol for preventing wrong-site surgery and the World Health Organization's Surgical Safety Checklist. The circulating nurse often leads it, and anyone on the team can stop the procedure if something is not right.
How to become an OR nurse
- Earn a nursing degree (ADN in about two years or BSN in about four) and pass the NCLEX-RN.
- Get into the OR. Many hospitals now hire new graduates into OR residency programs. Others want some acute care experience first.
- Complete a perioperative training program. Many hospitals use AORN's Periop 101, a well-known course that teaches new OR nurses aseptic technique, positioning, surgical safety and both circulating and scrubbing.
- Get BLS and ACLS certified. Many ORs require both.
- Earn the CNOR after two years of perioperative experience.
- Consider advancing to RNFA, charge nurse, OR educator or surgical services manager.
CNOR certification
The CNOR (Certified Perioperative Nurse) is the main certification for OR nurses, offered by the Competency and Credentialing Institute (CCI).
- Eligibility: according to CCI, you need a current, unrestricted RN license, current work in perioperative nursing and at least two years and 2,400 hours of perioperative experience, with at least 1,200 hours in the intraoperative setting.
- The exam: 200 multiple-choice questions over 3 hours and 45 minutes.
- Recertification: every five years.
- Related CCI credentials: CRNFA for first assistants, CNAMB for ambulatory surgery nurses and CSSM for surgical services managers.
How much do OR nurses make?
The U.S. Bureau of Labor Statistics does not publish a separate salary for OR, operating room or surgical nurses, because it groups them with all registered nurses. The median annual wage for registered nurses was $97,550 in May 2025, according to the BLS.
OR nurse pay depends on:
- Call pay: hospital OR nurses usually take call for emergency surgeries, which adds on-call and callback pay.
- Setting: hospitals, especially trauma centers, often pay more than ambulatory surgery centers, which offer more predictable hours.
- Specialty service: hearts, neuro and transplant teams may pay more.
- Role: RNFAs, charge nurses and managers earn more.
- Certification and location: many hospitals pay a CNOR differential, and pay varies widely by state.
Surgical nurse practitioners
Surgical nurse practitioners work with surgical teams to see patients before and after surgery, manage post-op care on the floor, round on inpatients and sometimes first assist in the OR. Most are certified in adult-gerontology acute care or family practice. Learn more in our complete guide to nurse practitioners, and read about the anesthesia side of the OR in our complete guide to CRNAs.
What is it like to be an OR nurse?
- Schedule: many OR nurses work weekday shifts (often 8, 10 or 12 hours) with scheduled call for nights, weekends and holidays. Surgery centers usually have no call at all.
- One patient at a time: OR nurses focus on one patient during a case, which is a big contrast with floor nursing.
- Teamwork: surgeons, anesthesia, techs and nurses work closely, and good OR teams have a rhythm like a pit crew.
- Precision: counts, sterility, positioning and documentation all have to be exactly right.
- Stamina: long cases mean hours on your feet in a cold room.
OR nurses often say the best part is seeing a problem fixed right in front of them, whether it is a new hip, a repaired heart valve or a removed tumor.
A short history of OR nursing
- Late 1800s: as antiseptic and then aseptic surgery spread, trained nurses took over preparing instruments and supplies and keeping operating rooms clean.
- Early 1900s: operating room nursing becomes a specialty, and nurses also give anesthesia (see our CRNA guide for that history).
- 1949: OR nurses found the Association of Operating Room Nurses, today's AORN (Association of periOperative Registered Nurses).
- 1979: AORN begins celebrating OR Nurse Week, renamed Perioperative Nurse Week in 2000 to include every phase of surgical care.
- 2004 and 2008: The Joint Commission's Universal Protocol and the WHO Surgical Safety Checklist make the surgical time out a standard part of every operation.
When is Perioperative Nurse Week?
Perioperative Nurse Week is celebrated every year during the second week of November. In 2026, it runs from November 8 to 14. AORN leads the celebration, which recognizes pre-op, OR and PACU nurses.
Perioperative Nurse Week ideas
- Bring breakfast before first cases. OR days start early, and breaks are unpredictable.
- Decorate the OR lounge and post thank-you notes from surgeons and anesthesia staff.
- Give awards like "Fastest Room Turnover," "Best Surgeon Whisperer" and "Count Is Correct Champion."
- Sponsor CNOR exam fees or AORN memberships.
- Recognize the surgical techs, sterile processing team and anesthesia techs too.
- Give the team matching shirts or fun scrub caps to wear during the week.
Gifts for OR nurses
A few favorites from our OR collection:
A throwback design for operating room nurses who wear their specialty with pride outside the OR. $29.99
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For the coffee that gets OR nurses to the 0700 first case. An easy Perioperative Nurse Week gift. $15.99
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For surgeon preference notes, Periop 101 study sessions or CNOR prep. $17.99
Shop now →OR nurse humor
- "Sterile field. Zero chill." (Now a sticker.)
- "Don't touch anything blue."
- "The count is correct. That's the best sentence in the English language."
- "I know your surgeon's glove size, music playlist and coffee order. We're basically married."
- "Yes, it's always this cold in here. No, we can't turn it up."
- "My patients never complain. They're asleep."
Frequently asked questions
What does an OR nurse do?
OR nurses care for patients before, during and after surgery. They prepare and position patients, maintain the sterile field, hand instruments to surgeons, count supplies, lead safety checks like the time out, document the procedure and advocate for patients under anesthesia.
What is the difference between a circulating nurse and a scrub nurse?
The circulating nurse works outside the sterile field, managing the room, documentation and patient advocacy. The scrub nurse is gowned and gloved inside the sterile field, setting up instruments and handing them to the surgeon.
What is an RNFA?
An RNFA, or RN first assistant, is an experienced perioperative nurse with advanced training who directly assists the surgeon with exposure, bleeding control and closing incisions. Many earn the CRNFA credential.
What is the CNOR certification?
The CNOR is the main certification for perioperative nurses, offered by the Competency and Credentialing Institute. It requires an RN license and at least two years and 2,400 hours of perioperative experience, including 1,200 intraoperative hours.
Can new grads work in the OR?
Yes. Many hospitals hire new graduates into OR residency programs, often using AORN's Periop 101 course to train them in circulating and scrubbing.
How much do OR nurses make?
BLS does not report OR nurse pay separately. Registered nurses overall earned a median of $97,550 in May 2025. OR nurse pay varies by setting, call pay, specialty, role, certification and location.
Do OR nurses work nights and weekends?
Most OR nurses work weekday shifts but take scheduled call for emergency surgeries on nights, weekends and holidays. Ambulatory surgery centers usually have no call.
When is Perioperative Nurse Week?
Perioperative Nurse Week is celebrated every year during the second week of November. In 2026, it runs November 8 to 14.
Exploring other specialties? See our full guide to nurse specialties and the types of nurses.
Celebrate the OR nurses in your life
For Perioperative Nurse Week, a new CNOR or just a correct count: gifts for the nurses who keep every surgery safe.
Shop the OR Collection →Sources
- U.S. Bureau of Labor Statistics, Occupational Outlook Handbook: Registered Nurses
- Association of periOperative Registered Nurses, Perioperative Nurses Week 2026
- Competency and Credentialing Institute, Certification Rationales
- Competency and Credentialing Institute, CNOR Eligibility Requirements
- The Joint Commission, Universal Protocol for Preventing Wrong Site, Wrong Procedure and Wrong Person Surgery
- World Health Organization, Surgical Safety Checklist