Radiation Safety in Orthopedic Surgery Using C-Arm Systems

C-arm fluoroscopy has become indispensable in modern orthopedic and trauma surgery, enabling precise fracture reduction, implant placement, and minimally invasive procedures. At the same time, repeated use of C-arms in the operating room creates a significant source of scatter radiation for surgeons, nurses, and anesthesiologists.

Why C-Arm Use in Orthopedics Is High-Risk for Staff

Orthopedic procedures often require multiple fluoroscopic shots or continuous fluoroscopy with the surgical team standing very close to the X-ray source. The surgeon's hands, head, eyes, and thyroid can receive substantial cumulative doses over a career, especially in high-volume trauma centers. Unlike diagnostic radiology rooms, operating rooms are not always purpose-built for radiation work, so staff protection relies heavily on local shielding and personal protective equipment.

The risk is particularly high in procedures where the C-arm is frequently repositioned (e.g., intramedullary nailing, pelvic and spinal fixation, complex joint reconstructions), because staff may not consistently step away or reposition shields for each exposure.

Understanding Radiation Geometry Around the C-Arm

Effective protection starts with understanding how scatter behaves around the C-arm:

• Scatter radiation is strongest on the X-ray tube side and lower on the detector side. Standing on the detector side whenever possible can significantly reduce staff exposure.

• The patient is the main source of scatter; dose decreases rapidly with distance, following the inverse square law. Even small increases in distance from the beam can noticeably lower exposure.

• Oblique and lateral projections generally create more scatter toward the operator than simple AP views, especially when the tube is angled toward the staff.

For orthopedic teams, incorporating these geometric principles into routine positioning can dramatically reduce dose without affecting image quality.

Optimizing C-Arm Technique in Orthopedic Surgery

Several practical measures help keep dose As Low As Reasonably Achievable (ALARA) during orthopedic procedures:

1. Use pulsed fluoroscopy with the lowest frame rate that still provides adequate visualization.

2. Prefer short fluoroscopic "taps" instead of prolonged continuous fluoroscopy.

3. Collimate tightly to the region of interest to reduce both patient dose and scatter to staff.

4. Use appropriate imaging modes (last-image hold, low-dose mode) instead of repeatedly acquiring new images.

5. Avoid unnecessary magnification modes, which usually increase dose.

Standardizing these practices across the orthopedic department, and incorporating them into surgeon and resident training, is critical for long-term dose reduction.

Positioning the Surgical Team for Safety

Small changes in team positioning can have a large impact on dose:

1. Whenever possible, position the surgeon and scrub nurse on the detector side of the C-arm instead of the tube side.

2. Stand as far from the X-ray tube and patient as practical while maintaining surgical control, using longer instruments when appropriate.

3. Take a step back or turn away during each exposure if hands do not need to be in the beam area.

4. Keep the patient's irradiated region as close as possible to the image receptor to reduce dose and scatter.

Clear assignment of positions around the table and standard "radiation-time" commands (e.g., "X-ray on") improve team awareness and make it easier for everyone to respond consistently.

Essential Personal Protective Equipment for Orthopedic OR Staff

Because orthopedic staff often remain in the room during exposure, robust personal protective equipment (PPE) is essential:

• Lead or lead-equivalent aprons: Wrap-around or vest-and-skirt designs are recommended for surgeons and nurses who move frequently and may receive radiation from multiple directions. Typical front lead equivalence is 0.35–0.5 mmPb.

• Thyroid collars: The thyroid is highly radiosensitive and located within the scattered field; a properly fitted collar should be standard for all staff staying in the room.

• Lead glasses: Repeated scatter to the lens of the eye can contribute to cataract formation; lightweight lead glasses help to limit cumulative eye dose.

• Optional caps and gloves: In high-volume or complex cases, additional protection for the head and hands can be considered, especially when hands are near the beam.

Longyue Medical provides a complete range of X-ray protective aprons, thyroid collars, caps, glasses, and gloves designed for orthopedic and trauma operating rooms. Lightweight and lead-free series help reduce fatigue during long surgeries while maintaining the declared protective equivalence.

Using Local Shields and Curtains in the Operating Room

In addition to PPE, local shields are a powerful way to reduce staff exposure around the C-arm:

• Mobile lead screens: Placed between the X-ray source and staff who are not scrubbed in, these screens protect anesthesiologists and circulating nurses without interfering with the sterile field.

• Table-side lead curtains: Curtains attached to the operating table help shield the legs and lower trunk of the surgeon and scrub nurse from under-table scatter.

• Ceiling-suspended shields and track-mounted curtains: In hybrid ORs or rooms designed for frequent C-arm use, ceiling-mounted shields and curtains can provide flexible, hands-free protection.

Longyue's X-ray protective lead screens and curtains can be configured to fit different OR layouts and C-arm types, helping hospitals retrofit existing operating rooms into safer fluoroscopy environments.

Establishing a Radiation Safety Culture in Orthopedic Surgery

Technical measures are only effective when embedded in a strong safety culture. Orthopedic departments can promote this by:

1. Providing regular training on radiation risks, protection principles, and safe use of C-arm systems.

2. Requiring consistent use of PPE and making properly sized protective garments available to all staff.

3. Implementing personal dosimetry for surgeons and key staff, with periodic review and feedback.

4. Designating a radiation safety champion or team within orthopedics to coordinate with medical physics and hospital radiation protection officers.

Longyue Medical supports these efforts by supplying durable, comfortable PPE and shielding solutions that staff are willing to use every day, making radiation safety an integral part of orthopedic surgical practice rather than an afterthought.

For tailored radiation protection solutions for your orthopedic operating rooms, you can contact Longyue Medical at lyylqx@126.com or visit www.longyuemedical.com.