The right cryogenic work wear is not optional equipment in a UK IVF laboratory. Liquid nitrogen at -195.8 degrees C causes immediate, severe tissue damage on skin contact. A splash to the eyes without face protection can cause permanent vision loss. Under the Personal Protective Equipment at Work Regulations 1992 (as amended by PPER 2022), the HSE places a legal duty on employers to assess cryogenic risks and ensure appropriate PPE is provided, used and maintained – free of charge to employees.

This guide covers every category of cryogenic work wear relevant to UK IVF and embryology laboratories, what the correct specification looks like for each task, and the mistakes that put staff at risk even when PPE is available.

Why cryogenic PPE is different from standard laboratory wear

Standard laboratory gloves, safety glasses and lab coats are not rated for cryogenic work. This is the most important thing to understand about cryogenic work wear – and also the mistake that catches UK labs out most often.

A standard latex or nitrile glove provides no meaningful protection against liquid nitrogen contact. A standard polycarbonate safety goggle does not protect against a high-velocity nitrogen splash in the same way a full cryogenic face shield does. A standard lab coat will not prevent cold burns if liquid nitrogen soaks through fabric to reach the skin beneath.

Every item of PPE used for cryogenic work in a UK IVF laboratory must be specifically rated for cryogenic temperatures and the hazard profile of each specific task. The task determines the specification. The specification determines the product.

Cryogenic gloves: why length is the critical specification

The single most common PPE specification error in UK IVF laboratories is using wrist-length cryogenic gloves for tasks that require elbow or shoulder length protection.

Cryolab supplies cryogenic laboratory gloves in four lengths, each appropriate for a specific range of tasks:

Wrist-length gloves are appropriate for surface handling of cryogenic items and brief contact tasks where the hands do not enter a vessel. For vitrification procedures where the hands are near but not submerged in liquid nitrogen, wrist-length gloves are generally acceptable provided the technique keeps hands clear of the nitrogen surface.

Mid-arm length gloves suit tasks involving reaching into a working dewar to moderate depths of 20 to 30 centimetres.

Elbow-length gloves are required for retrieving samples from storage vessels with neck depths requiring deeper arm entry, and for vessel filling procedures where liquid nitrogen is being poured.

Shoulder-length gloves provide protection for accessing the bottom of deep storage vessels with neck depths of 40 centimetres or more.

The question to ask at every nitrogen-handling station in your laboratory is not whether cryogenic gloves are available. It is whether the correct length of cryogenic glove is available for each specific task performed at that station, and whether every staff member knows which length applies to which task.

An important handling note confirmed by multiple cryogenic safety sources including Berkeley Lab Environmental Health and Safety: cryogenic gloves should be loose-fitting. A glove that fits tightly is significantly harder to remove quickly if liquid nitrogen enters the glove. A loose glove can be shaken off rapidly. This counterintuitive fit recommendation is well established in cryogenic safety guidance and must be built into staff training.

Face protection: when goggles are not enough

Safety goggles protect the eyes. They do not protect the face. For any task in an IVF laboratory that involves pouring liquid nitrogen, filling a storage vessel, charging a dry shipper, or any procedure where liquid nitrogen is in motion, full-face protection is required.

A full-face cryogenic face shield provides protection to the face, forehead and chin that goggles alone cannot. Cryolab also supplies a lab face shield suitable for laboratory cryogenic procedures. For tasks where a face shield is in use, safety goggles or glasses should still be worn underneath as an additional eye protection layer.

The practical rule for UK IVF labs is: safety goggles or glasses as a baseline for all work near cryogenic vessels, and a full-face shield for any task involving active liquid nitrogen transfer or high-splash-risk activities. These two categories of task must be clearly distinguished in your laboratory’s written procedures.

Cryolab also supplies Uvex Ultrasonic Safety Goggles and clear plastic safety glasses for baseline eye protection. Face shields should be inspected before each use – a scratched or clouded shield impairs the visibility needed for precise procedures and must be replaced.

Safety aprons: body protection for transfer and charging procedures

A waterproof cryogenic safety apron provides essential body protection during liquid nitrogen transfer procedures. The highest-risk scenarios in an IVF laboratory are vessel filling and dry shipper charging, where larger volumes of liquid nitrogen are being handled and a splash reaching the torso is genuinely possible.

A standard lab coat is not a substitute for a cryogenic apron in these tasks. Lab coats are not waterproof, and liquid nitrogen that soaks into fabric continues to contact the skin beneath it. The apron is worn over the lab coat, not instead of it.

Footwear and general workwear

Closed-toe, solid-construction footwear is the minimum standard for anyone working in a room where liquid nitrogen is handled or stored. Liquid nitrogen that spills at floor level evaporates rapidly, but on the way to evaporation it can contact footwear that allows cold gas or liquid to reach the foot.

Trousers worn outside footwear – not tucked in – prevent liquid nitrogen from flowing into shoes if a spill reaches floor level. This is a simple procedural point that is easy to overlook but worth specifying in your written cryogenic handling procedures.

Oxygen depletion monitors: the safety installation that works alongside PPE

Cryogenic work wear protects against direct contact hazards. It does not protect against oxygen depletion, which is the primary environmental hazard in any room where liquid nitrogen is stored or used in volume.

Liquid nitrogen venting displaces oxygen in enclosed spaces. The HSE recommends maintaining oxygen concentration above 19.5% in workplaces. At concentrations below this, cognitive impairment begins – and critically, the person affected typically does not feel the effect in time to leave the area, because the sensation of breathlessness requires carbon dioxide build-up rather than oxygen depletion.

An oxygen depletion monitor with an audible alarm that activates at the 19.5% threshold is an expected control measure in any HFEA-licensed storage environment. PPE does not substitute for monitoring. The monitor provides the warning that allows staff to evacuate safely before a hazardous oxygen level is reached.

Training: the step that makes work wear effective

Providing the correct cryogenic work wear is the first requirement under PPER 1992. Ensuring that every staff member who handles liquid nitrogen knows which item is required for which task – and why – is the second requirement, and carries equal legal weight. Under PPER 1992, employers must ensure workers have sufficient information, instruction and training on the use of PPE provided.

The full Cryolab cryogenic workwear range covers all PPE categories relevant to UK IVF laboratory cryogenic work: gloves in all four lengths, face shields, safety goggles, safety glasses and waterproof aprons. For specific guidance on PPE specification for your laboratory, contact the Cryolab team or use CryoGPT for immediate product advice.