Clinical guide

IPL Patient Screening: The Consultation That Prevents Claims

IPL patient screening is a fixed sequence of questions asked before any gel touches skin: current medication, recent sun exposure and self-tan, pregnancy, epilepsy, infection in the treatment field, keloid history, tattoos, prior treatments, and what the client expects. A yes on any of them means you adjust, defer with a date, or refer out. Here is the order, what to record, and the sentences that make a deferral stick.

Ask everything before the gel goes on

Plenty of clinics own a consultation form. Fewer own a consultation.

Order is the trick. Our MF-05 E-Light IPL and RF manuals fix the pre-treatment routine:

Consultation: complaint, pain tolerance, expected outcome, confirmation that no contraindication applies
Observation of the skin and how the lesions are distributed
Treatment record built, photographs taken, signature obtained
Only then execution: handpiece and filter, cleanse, 1 to 3mm of hair, roughly 2mm of gel, goggles, parameters, test shot

Steps one to three are the screening. Ask while the client is dressed and sitting up, because once gel is on a cheek the awkward questions get skipped. This page is educational material for equipment buyers, not medical advice.

Medication first, and ask for all of it

Nobody files a repeat prescription under "relevant to my beauty appointment". Ask for tablets, creams, supplements, anything new.

Photosensitivity isn't a short list of exotic drugs. DermNet's reference on drug-induced photosensitivity names whole classes: tetracyclines, fluoroquinolones and sulfonamides; amiodarone and hydrochlorothiazide; ibuprofen, naproxen and diclofenac; plus psoralens, oral retinoids and St John's wort. Our manuals name tetracycline outright as a contraindication, and warn that marked oedema after an IPL session may come from a photosensitising drug. The swelling you fear is the drug nobody asked about.

Blood thinners are a different question, and they don't belong under photosensitivity. Warfarin, the direct oral anticoagulants and antiplatelet drugs such as aspirin or clopidogrel don't change how skin absorbs light. They change clotting, so what you're managing is bruising and purpura in the treated field. Our E-Light manual lists anticoagulant use within the previous two weeks among its contraindications, and that window is the manufacturer's, not clinical advice to anybody's patient. Now the rule that keeps you out of court. A clinic never asks a client to stop, pause or alter a prescribed medicine. StatPearls, reviewing anticoagulants in cutaneous surgery, records the current recommendation as continuing these agents through the perioperative period, since even brief interruptions can trigger thrombotic events whose risk outweighs the bleeding. One move is open to you: defer, put the question to the prescriber, and treat only on their written confirmation. That call belongs to the prescriber. It is never yours.

Isotretinoin needs a written policy, settled before reception improvises one. The patient sheet in our engineering archive uses six months, mirroring the package insert. The 2017 ASDS Guidelines Task Force consensus landed elsewhere, finding insufficient evidence to justify delaying nonablative treatments including hair removal lights. Pick a line and document it.

One caveat: most photosensitivity data concerns ultraviolet exposure, and IPL is filtered visible and near-infrared light. Nobody has quantified the risk drug by drug. Defer anyway.

Recent sun, self-tan, and the pigment that isn't on the form

A tan is competing pigment, and it doesn't announce itself. Our archive's patient sheet asks for four weeks with no unprotected sun or solarium use, no fake tan for one to two weeks, and no waxing or tweezing for four weeks before hair work, because the shaft has to be joined to the bulb. Shaving is fine.

The consequence is measurable. In a blinded randomised trial of 16 subjects with Fitzpatrick types II to V, Thaysen-Petersen and colleagues delivered single IPL doses of 22, 34 and 46 J/cm2 and recorded erythema in 87% of subjects, hyperpigmentation in 60%, purpura in 27%, blisters and hypopigmentation in 20% each. Darker pigmentation and rising fluence were the determinants. StatPearls gives the mechanism: epidermal melanin absorbs more of the delivered energy, so adverse events climb with phototype.

Read your machine's label before you argue with that. Our E-Light parameter tables classify all six types, yet starting values run only to type V, where hair removal begins at 28 to 38J against 38 to 50J for type I. Type VI is blank, and the patient sheet lists very dark skin as a contraindication. Outside your model's labelled range you don't treat. Refer to a longer wavelength: our DL-07 808nm diode.

The rest of the list, asked in one pass

Run it as a script, so nothing depends on what a therapist recalls at 4pm on a Saturday.

Ask this	Source	What a yes means
Are you pregnant or breastfeeding?	Manuals	Defer. Not a conversation worth having twice
Any blood thinner? Warfarin, a DOAC, aspirin, clopidogrel	Manuals	Bruising and purpura risk, not light risk. Defer and ask the prescriber. Never advise stopping
Epilepsy, seizures, or a photosensitive condition?	Manuals	Written clearance from the treating doctor, or decline
Cold sores, infection, eczema or dermatitis in the area?	Clinician guide	Defer until settled; antiviral cover if herpes-prone
Do you scar badly? Any keloid?	Both	Defer, or a trial area with written consent
Tattoo or permanent makeup where I'd be working?	Clinician guide	Work around it with margin. Never fire over ink
Pacemaker, implant, or metal jewellery in the field?	Manuals	Rule out the RF channel; assess IPL separately
Serious diabetes, hypertension or heart disease?	Manuals	Listed contraindications. Defer to the treating doctor
Vitiligo or psoriasis anywhere near the field?	Clinician guide	Warn that a Koebner response can follow
Is that mole new, changing, or undiagnosed?	Manuals	Refer for diagnosis. Biopsy is a doctor's call
What have you had done before, and how did it react?	Experience	Start below the table value, then test

Expectation screening carries the same weight

Clinical complaints get settled quietly. Expectation complaints get posted online.

Only follicles in anagen respond to light, and that proportion isn't one number. The growth cycle table in our clinician guide runs site by site: scalp 85% anagen, beard 70%, upper lip 65%, underarm 30%, upper limbs and legs 20%. The patient sheet spaces facial sessions at six to eight weeks and body areas at ten to twelve. The same sheet names the ceiling: 70% to 90% hair reduction, never 100%, and light, grey or red hair isn't treatable with IPL.

Say the awkward thing before money changes hands. Our clinician guide records regrowth in a minority of clients, most often women with type III to IV skin and dark facial hair. Said first that's professionalism. Said afterwards it's an excuse. Our IPL and diode hair removal solutions page covers session counts by hair and skin colour.

Pigment needs the same candour: it usually darkens first, sometimes almost black, then sloughs or fades over seven to twenty-eight days. Our photofacial and skin rejuvenation solutions page covers that arc. Ask what they expect after one session, whether an event is driving the timing, and what they've tried elsewhere. Someone who failed at two other clinics is either hard to treat or impossible to please. Find out which.

Record it, test properly, then say the deferral out loud

Our manuals are specific: write details onto a dedicated client file, check every item, photograph, sign, keep. A minimum:

Every question and its actual answer, in the client's own words
Operator-assessed Fitzpatrick type and tan status, at every visit
The dated medication list
Test site, full parameters per pass and zone, and the follow-up reaction
Standardised photographs. Same light, same distance, every session
Signed consent naming post-inflammatory hyperpigmentation, hypopigmentation, blistering and no visible change
The deferral, its reason and its return date

That test line hides a procedure. Our manuals put it on the inner forearm at low energy: two flashes, then ask what the client feels. Mild warmth is the target, and redness after a hair removal shot should fade within about thirty minutes. Step energy up by no more than 2J at a time. For a pigmented patch, the melasma chapter of our clinician guide says trial 0.5 to 1cm2 first. Consent isn't the signature. It's the conversation the signature records, so re-consent whenever you change platform, indication or fluence.

Then the harder skill. Deferring without losing the booking:

"I can treat you, just not today." Then the reason, then a date.
"I won't ask you to touch your medication. I'll write to your doctor, and we'll book you once they reply."
"That mark needs a diagnosis before it needs a light."
"Your tan is borrowing the energy I need. Four weeks, and I'll get a better result at a lower setting."

Book the return date before they leave. A deferral with a date reads as care. Without one it reads as rejection. Getting a whole room to say it the same way is training, which is what our installation, training and clinical support programme covers.

Common questions

Can we treat Fitzpatrick V or VI with IPL?

Only if your machine is labelled for it, and plenty of IPL platforms aren't. Our parameter tables stop at type V and leave the type VI row blank, and the patient sheet lists very dark skin as a contraindication. Past a device's labelled range is where burns and lasting pigment change come from. Refer toward an 808nm diode.

How long after isotretinoin can we treat?

Your written policy decides, and it should exist before a client asks. Our archive's patient sheet uses six months, in line with the package insert. The ASDS task force concluded in 2017 that evidence was insufficient to justify delaying nonablative treatments including hair removal lights. Document your rule, then defer to the prescriber.

Is a test spot enough to clear someone who failed screening?

No, and confusing the two is how clinics get hurt. Screening decides whether you treat. Testing decides how. A test shot answers one question: how this skin responds today at this energy. It says nothing about a photosensitising drug, an undiagnosed lesion or a keloid tendency. Fail screening and you get a date, or a referral.

Evidence & further reading

Educational material for equipment selection and operator training. It is not medical advice, a treatment protocol or a promise of clinical outcome.

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