Surgical caps: hair is a vector in two directions, not one

Why the cap protects the operating field from the operator and the operator from aerosol, which areas most models leave uncovered, and how to manage a reusable cap.

The cap is perceived as a one-way device, protecting the patient from hair and dandruff falling into the operating field. That function exists and matters in oral and implant surgery, but it is only half the problem. The other half concerns the operator: during every aerosol-generating procedure, the suspension of saliva, blood and water produced by turbine and scaler settles on every surface within a radius of several tens of centimetres, and hair is one of those surfaces — with the aggravating factor of being porous, hard to decontaminate and located above the face. An operator without a cap leaves the surgery carrying contaminated material in their hair, and takes it into the administrative area, the waiting room and home. It is the least discussed aspect and the most continuous over time.

From this follows the coverage criterion, which is where most inexpensive models fail. A cap must contain all the hair, including at the nape and sideburns, which are exactly the areas that escape a cap that is too small or has a slack elastic. The problem is more concrete with long hair: badly gathered, it emerges from the rear edge the moment the operator leans over the patient, that is precisely in the position where the field is beneath it. In surgical procedures, models covering the nape as well are preferable to simple bouffant caps, and one-size-fits-all should be checked on actual staff before ordering a supply: a cap that does not stay put gets taken off.

On the choice between single-use and reusable, the reasoning is the same already seen for bib clips: not ideological but organisational. A washable fabric cap — polyester and elastane blends are the commonest — has a lower per-use cost and withstands many cycles, but it only works if it is actually washed after each working day, separately from personal clothing and at the temperature stated by the manufacturer. A reusable cap worn for several days is not a saving: it is an accumulation. Single-use removes the variable and makes sense in surgery and in high-volume practices, where laundry handling time is the scarce resource.

One final note on donning and doffing sequence, which applies to all protective equipment but is ignored most often with the cap. The cap goes on first, before mask and gloves, because adjusting it afterwards means touching your hair with hands already prepared. And it comes off last, or at any rate after the gloves, grasping it from the inside and not by the contaminated outer edge. Two one-second gestures that decide whether the device protected or merely took part.

On Oralzon you will find the surgical caps available on the marketplace and, to complete operator protective equipment, also disposable masks and nitrile gloves.