Module 7: Physical Environment & Safety Hazards

Introduction

This module covers the physical environment of surgical facilities and the various safety hazards encountered in these settings. Understanding these topics is essential for ensuring patient and staff safety, maintaining infection control, and complying with healthcare regulations.

The Surgery Department

• Common Locations: The surgery department is typically located near the ICU, ED, L&D, and CSPO for easier access and efficient patient flow.

• Purpose: To provide a controlled environment for surgical procedures, minimizing risks and optimizing outcomes.

Floor Plans

• Race Track: Individual operating rooms are located around a central core, with separate entrances for patient and post-anesthesia care units.

• Hotel-Style: Central corridor (hallway) with operating rooms and storage rooms on each side.

• Specialty Grouping: Operating rooms are grouped by specialty, which can be a variation of the hotel-style layout.

Traffic Control

Traffic control in the surgical department is essential for infection prevention and efficient workflow. Areas are defined by the level of restriction:

• Unrestricted Area: Street clothes allowed; typically includes waiting areas and pre-op holding.

• Semi-Restricted Area: Scrubs and hair covers required; includes corridors and storage areas.

• Restricted Area: Scrubs, hair covers, and masks required; includes operating rooms and sterile storage.

Environmental Control of the OR

• Temperature: Maintained between 20-23°C (68-73°F) to reduce infection risk and maintain comfort.

• Humidity: Between 30-60% to prevent microbial growth and static electricity.

• Ventilation: Positive pressure keeps contaminants out; minimum of 15 air exchanges per hour, with 20-25 recommended per CDC.

• HEPA Filters: Used to remove microbial contamination from the air.

Gas Outlets in the OR

Gas outlets are color-coded for safety and quick identification:

Additional info: Gas outlets are usually located outside the operating room door for emergency access.

Standard OR Furniture & Other Typical Items

• Viewing Boxes: Used for viewing radiographs and other images during surgery.

• Booms: Ceiling-mounted arms that hold equipment, reducing clutter and improving access.

• Ring Stand: Holds basins for sterile solutions.

• Kick Bucket: Used for discarded sponges and other items during surgery.

• Suction System: Removes fluids from the surgical field.

Electrical Hazards

• Definition: Risks associated with electrical equipment, such as lasers and robots. Equipment must be grounded to prevent electrical current from passing through the patient.

• Examples: Cautery devices, lasers, robots, and electrosurgical equipment.

Fire Safety

• Definition: Fire can occur in any procedure, most commonly on the face, neck, and chest due to oxygen use.

• Prevention: Use non-alcohol-based preps, allow alcohol-based preps to dry, and avoid ignition sources near oxygen.

• Types of Fire Extinguishers:

  • Type A: Cloth, wood, rubber, paper, plastics

  • Type B: Gasoline, grease, oil, or flammable liquids

  • Type C: Electrical fires

• PASS Technique: Pull, Aim, Squeeze, Sweep (used for operating a fire extinguisher).

Ionizing Radiation

• Definition: Used in therapeutic doses; can be useful in the treatment of diseases such as cancer.

• Safety: Limit exposure time, increase distance, and use shielding to reduce risk.

Ergonomics Safety

• Definition: Injuries from poor body mechanics, including musculoskeletal disorders.

• Prevention: Use proper lifting techniques and ergonomic equipment.

Biological Hazards

• Definition: Risks from exposure to body fluids and pathogens.

• Examples: Bloodborne pathogens, surgical smoke, and contaminated instruments.

• Prevention: Use PPE, proper disposal of sharps, and follow CDC guidelines.

Chemical Hazards

• Definition: Danger associated with contact or inhalation of hazardous chemicals.

• Safety Data Sheets (MSDS): Provide information on handling and risks of chemicals.

• Waste Anesthetic Gas: Scavenger systems collect and dispose of waste gases to prevent buildup and exposure.

• PMMA (Polymethyl Methacrylate): Used for bone cement; powder and liquid can damage respiratory tract and eyes.

• Formalin: Common preservative for specimens; strong smell and irritant.

• EtO (Ethylene Oxide): Sterilant; cancer risk and can cause nausea/vomiting.

• Glutaraldehyde: Disinfecting agent; cancer risk.

Summary Table: Safety Hazards in the OR

Key Terms & Definitions

• Positive Pressure: Air pressure inside the room is higher than outside, preventing contaminants from entering.

• HEPA Filter: High-efficiency particulate air filter used to remove airborne particles.

• MSDS: Material Safety Data Sheet; provides information on chemical hazards.

• PPE: Personal Protective Equipment; includes gloves, masks, gowns, and eye protection.

Formulas & Equations

• Air Exchange Rate:

• Radiation Exposure:

Applications & Examples

• Example: Proper use of PPE and adherence to traffic control zones can significantly reduce the risk of infection in the OR.

• Example: Understanding the color coding of gas outlets ensures rapid response in emergencies.

Additional info: Some details, such as specific CDC recommendations and the PASS technique, were expanded for academic completeness.