Knee Operated Stainless Steel Hand Wash Trough for Surgical Scrub Areas

Hands-Free Operation as a Cross-Contamination Control Measure

Surgical hand antisepsis protocols require that once the washing process begins, the surgeon’s hands must not come into contact with any surface — faucet handles, soap dispensers, or sink fittings — before gowning and gloving. Contact with a contaminated surface after disinfection reintroduces microorganisms to the hands, negating the purpose of the scrub and increasing the risk of surgical site infection.

The M03-21073 addresses this requirement through a knee-operated valve system. Water flow is activated and deactivated by pressing the knee panel — a stainless steel plate mounted at knee height on the front of the trough. Soap dispensing, where configured, is similarly activated through a separate knee-operated pump mechanism. The entire hand washing sequence — from initial wetting through antisepsis to final rinse — is completed without hand contact with any fitting, supporting compliance with surgical hand hygiene standards referenced in international operating room design guidelines.

Multi-Station Trough Design for Simultaneous Scrubbing

Configurable Station Count from Single to Quadruple

The trough is available in four standard lengths, each corresponding to a station count:

Each station is equipped with its own faucet, knee valve, and soap dispenser connection, allowing multiple surgical team members to scrub simultaneously. This parallel scrubbing capability reduces the time between patient preparation and incision, which is critical in trauma centers, cardiac surgery suites, and high-volume operating theaters where case turnover directly affects patient throughput.

Spacing and Ergonomics for Surgical Teams

The station spacing is dimensioned to allow two users to stand side by side without elbow interference during the scrub. The trough depth accommodates full forearm washing — from fingertips to elbow — as required by surgical hand antisepsis protocols. The backsplash panel at the rear of the trough deflects water spray away from the user’s gown and the surrounding wall surface, maintaining a dry scrub zone perimeter.

Knee Valve Mechanism and Water Control System

Mechanical Reliability in High-Frequency Use

The knee valve is a mechanical push-action valve — not an electronic sensor — which eliminates dependence on electrical supply, sensor calibration, or battery replacement. This mechanical simplicity provides consistent operation in environments where reliability is non-negotiable: emergency operating rooms, field hospital surgical units, and facilities in regions where power stability cannot be guaranteed.

The valve is serviceable from the front of the unit, allowing maintenance technicians to access internal components without removing the trough from the wall or disassembling the cabinet structure. This front-access design reduces downtime during scheduled maintenance and supports the long service life expected of stainless steel surgical fixtures.

Integration with Mixing Valves and Soap Dispensers

The water supply line can be connected to a thermostatic mixing valve to regulate water temperature within the range specified for surgical scrubbing — typically 38–42°C — preventing both scalding and the cold-induced vasoconstriction that can compromise scrub effectiveness. A knee-operated soap dispenser pump can be integrated into the trough front panel, delivering liquid surgical scrub solution through a stainless steel spout positioned near the faucet.

Stainless Steel Trough Construction and Surface Engineering

Deep Basin Profile for Forearm Washing

The trough basin is fabricated from 304 stainless steel with a deep profile that contains water within the bowl during vigorous hand and forearm washing. The basin floor slopes toward the drain outlet, guiding water flow and preventing pooling that could harbor residual microorganisms. The one-piece pressed bowl construction minimizes seams and joints where bacteria could accumulate.

Splash Containment and Back Panel Design

The integrated backsplash panel extends above the rear edge of the trough, protecting the wall surface from water spray and disinfectant splashes. The panel is welded to the trough body as a continuous structure, eliminating the gap between sink and wall that can collect moisture and contaminants in separately mounted splash guards. The front of the trough features vertical stainless steel panels that conceal the plumbing components and knee valve mechanism from view, presenting a clean, enclosed appearance suitable for visible scrub zones in modern operating room layouts.

Sizing and Layout Adaptability for Different OR Configurations

Operating room layouts vary significantly across regions and facility types. A single-station trough may suffice for a small outpatient surgical center in Southeast Asia, while a four-station unit may be required for a teaching hospital’s main operating theater in Europe or the Middle East. The M03-21073 accommodates this range through its four standard lengths and custom dimension capability.

For projects with non-standard wall lengths or specific station spacing requirements, the trough can be manufactured to custom dimensions. Contractors and OR design teams can submit layout drawings, and the unit will be fabricated to match the available wall space, faucet positions, and plumbing connection points.

Compliance with Surgical Hand Hygiene Protocols

The knee-operated trough design supports alignment with widely referenced surgical hand hygiene guidelines, including:

• WHO Surgical Hand Preparation Guidelines — which recommend hands-free water activation to prevent recontamination

• DIN 12980 (German standard for scrub sinks) — which specifies design requirements for surgical hand washing stations including hands-free operation and splash containment

• AORN Guidelines for Surgical Attire and Hand Hygiene — which address the need for touchless faucet operation in the perioperative environment

While compliance certification depends on the final configuration and accessory selection, the fundamental design — knee-operated water control, deep basin for forearm washing, and seamless stainless steel construction — provides the structural basis for meeting these protocol requirements in operating room projects across Europe, the United States, ASEAN, and the Middle East.

Installation Types and Facility Integration

The M03-21073 can be installed in three configurations:

• Wall mounted — supported by heavy-duty wall brackets, with the floor area beneath the trough kept clear for cleaning. This is the standard configuration for operating room scrub zones where floor hygiene is critical.

• Freestanding on support legs — supported by stainless steel tubular legs, suitable for facilities where wall structural capacity is insufficient for the full load of a multi-station trough or where the plumbing runs below floor level.

• Floor mounted with wall bracing — a hybrid configuration combining floor support legs with wall-mounted stabilizing brackets, used for four-station units where the span and weight require additional structural support.

The installation type can be specified based on the project’s structural drawings, wall construction type, and plumbing layout. For hospital construction projects in seismic zones, the floor-mounted configuration with wall bracing provides additional stability against lateral movement.