Are rubber casters suitable for hospital operating room environments?

Rubber casters are not suitable for hospital operating room environments.
Hospital operating rooms have extremely stringent requirements for casters regarding sterility, cleanability, corrosion resistance, and quiet operation. However, the material properties and structural design of rubber casters (especially standard rubber casters) fail to meet these core requirements and may even compromise the sterile environment of the operating room, increasing safety risks. The specific reasons are as follows:

1. Substandard sterility and cleanability pose infection risks.
Operating rooms require "sterile, no blind spots," but rubber casters have two key drawbacks:
The surface easily harbors dirt and grime: To improve slip resistance, standard rubber casters often feature ridges or grooves. These ridges easily trap contaminants such as blood, medical solutions, and dust. Even with disinfectant, these ridges are difficult to completely clean. Long-term use can easily breed pathogens (such as E. coli and Staphylococcus aureus), increasing the risk of cross-infection during surgery. Material prone to aging and chipping: Rubber (especially natural rubber) is susceptible to aging and hardening in the operating room's constant temperature (22-25°C) and high-frequency disinfection environment, shedding tiny rubber fragments from its surface. These fragments can land in the surgical area (such as the operating table and instrument tray), contaminating sterile instruments or wounds, violating the basic "dust-free and sterile" operating room requirements.

2. Poor corrosion resistance and susceptible to damage from disinfectants
Operating rooms frequently disinfect casters with agents such as 75% alcohol, chlorine-containing disinfectants (such as 84 disinfectant), and iodine tincture. Rubber has extremely poor resistance to these agents.

Common rubber (such as natural rubber and styrene-butadiene rubber) undergoes a "swelling-degradation" reaction when exposed to alcohol and iodine tincture, resulting in stickiness, deformation, and even cracking of the wheel surface. Over time, the wheel structure gradually deteriorates, shortening its service life and potentially causing equipment tilt due to wheel fragmentation, compromising surgical safety. Even some oil-resistant rubbers cannot withstand the strong oxidizing disinfectants used in operating rooms (such as chlorine-containing disinfectants), and will still experience material degradation, making them unsuitable for long-term disinfection.

3. Inadequate Quietness and Stability, Interfering with Surgical Procedures
Operating rooms require a low-noise environment (typically ≤50 decibels), and equipment must be stable and free of shake. However, rubber casters struggle to meet these requirements:

High Rolling Noise: When rubber wheels come into contact with epoxy or PVC flooring in operating rooms, the mismatch between the elasticity of the material and the friction coefficient of the flooring creates a "frictional noise" (typically 55-65 decibels) that can disrupt communication between doctors and nurses and affect the interpretation of data from precision instruments (such as monitors) during surgery.

Poor Load-bearing Stability: Rubber has low mechanical strength, with a single wheel typically carrying ≤100kg, making it difficult to support heavy equipment such as operating tables, anesthesia machines, and large monitors. Furthermore, after prolonged load-bearing, wheel deformation ("wheel flattening") can occur, causing equipment to tilt and impacting surgical precision.

4. Alternatives: Prioritize medical-grade PU casters or chemically modified nylon casters.
If operating room environments are required, materials more suitable should be used instead:
Medical-grade PU casters: They offer a dense, smooth, and texture-free surface, are easy to clean and disinfect (autoclave-resistant), and are resistant to reagents such as alcohol and iodine. Rolling noise is ≤40 decibels, and they offer a moderate load capacity (100-200 kg per wheel), making them suitable for core equipment such as operating tables and instrument carts.
Chemically modified nylon casters: Containing antimicrobial agents and glass fiber, they offer an antimicrobial rating of ≥99% and strong corrosion resistance. They can carry up to 200-500 kg per wheel, making them suitable for heavy equipment such as surgical shadowless lamps and large ultrasound machines, and are resistant to aging and chipping.

In summary, rubber casters cannot meet the stringent requirements of hospital operating rooms in terms of sterility, sterilization resistance, quietness, and stability. They are therefore not recommended. Prioritize specialized casters made of medical-grade PU or chemically modified nylon.