Cases/Musculoskeletal Health

New White Fingers in Winter Who Uses Power Tools — Free SCA Practice Case

Man with new white fingers in winter who uses power tools

Station Timer

12:00

Golden Minute

Initial Introduction

•Introduce yourself

•Ask an open question — "How can I help you today?"

•Listen — don't interrupt

•Catch early cues

Data Gathering

History, ICE & Diagnosis

Clinical Management

Diagnosis, Plan & Decisions

Safety Net

Follow-up & Close

12:00

Golden Minute

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Materials for Candidate

Please review before starting the consultation

Patient Profile

Full Name

Brendan Garside

Age

52 years

Consultation Type

Telephone

Age

Situation

Telephone Consultation. Routine appointment booked by the patient.

Reason for Encounter

"My fingers have started going white and then blue when I'm out working. It's never happened before."

Medical Records

●PMH: Anxiety with panic symptoms, seen 5 weeks ago by a locum GP. Hay fever.
●Medications: Propranolol 40 mg twice daily (started 5 weeks ago). Cetirizine 10 mg as needed.
●Allergies: NKDA.
●Social: Groundsman. Ex smoker, stopped 5 years ago.

Recent Notes

●Review 5 weeks ago: Palpitations and panic episodes for 3 months. BP 132/84, pulse 88, thyroid function normal. Propranolol started.

Patient Script

For the friend playing the patient role

Character Overview: You are Brendan Garside, a 52 year old groundsman. You have looked after the playing fields and bowling green for a local council parks team for nearly 30 years, and you cut edges, trim verges and clear scrub with a petrol strimmer for four to five hours on most working days. You live with your wife Lynette, who works in a care home, and your son Shaun, who is 19 and an apprentice electrician. About five weeks ago you saw a locum who gave you propranolol for racing heart and panic episodes that had been coming on for three months. Three weeks ago, when the weather turned cold, your fingers began going white, then blue, then red while you were out working. You have never had this before and you are frightened. You are a straightforward, practical man who does not like fuss, and you talk quickly when you are worried. You think the new tablets are to blame, because they are the only thing that has changed. You have not connected it with the strimmer.

Opening Sentence: "Hello, doctor. This is a bit daft, but over the last few weeks my fingers have been going white and then blue when I'm out working, and then they go red and throb. I've never had it before and I'm worried I'm losing the circulation in them."

History if Asked (Data Gathering Phase)

●The colour change: "The ends of my fingers go dead white, like candle wax, then a sort of blue, and when they warm up they go red and throb. The thumbs seem to escape. It's the same on both hands, but a bit worse on the right."
●When it started and how often: "Three weeks ago, when it turned cold. I'd had a couple of white fingers on the first frosty mornings. Now it's most days I'm outside, maybe four or five times a week."
●Triggers: "Cold, mainly. Gripping the strimmer in the early morning, or touching cold metal gates. It happened once at the bus stop. It's never happened in the warm."
●How long it lasts: "Anything from ten minutes to half an hour. It stops when I get in the van with the heater on and run my hands under a warm tap."
●Pain, sores and damage: "It throbs and stings when they come back. No sores, no cracks, no black bits. The skin looks the same as ever."
●Tingling and numbness: "Honestly, I've had pins and needles in my fingertips after a day on the strimmer for a couple of years. I put it down to the buzzing and thought everyone got it. Lately they've been a bit numb in the mornings too."
●Hand function: "I fumble buttons sometimes and I dropped my mug last week. I'm not as quick on the bolts on the mower as I was."

Ideas, Concerns, Expectations

Gating note: Brendan does not raise any of the following himself. Each part comes out only when the doctor asks what he thinks is happening, what he is worried about, or what he was hoping for.

●Ideas: He thinks the propranolol has damaged the circulation in his hands, because it is the only new thing and he has heard it can make you cold. He has not linked it with the strimmer. "It started after the tablets, so it's them, isn't it? They've done something to my blood."
●Concerns: He is afraid the fingers will "die" and have to come off, as happened to a man he used to work with, and that if he cannot grip, he will lose the job he has done for 30 years. "Gerry at the depot lost the ends of two fingers. I don't want that. And if I can't use the tools, what am I for?"
●Expectations: He wants someone to tell him how to stop the fingers going dead. He half expects to be told to stop the tablets, but is nervous about doing so. "If it's the tablets, take me off them. But the panics were terrible. I don't want to go back to that."

If Asked: Medical History and Medications

Gating note: Brendan answers each of these plainly when the doctor asks about it.

●Anxiety: "It started about three months ago, when the depot talked about cutting the team. My heart was racing, I felt dizzy and I got short of breath a couple of times a week. I was sure it was a heart attack. The locum checked my blood pressure and bloods, said it was anxiety, and gave me propranolol. It has helped a lot. The racing has almost stopped."
●Propranolol: "Forty milligrams twice a day since I started. I've not missed any. I've not changed the dose."
●Other medicines: "Only cetirizine for hay fever, now and then. No decongestant sprays, no migraine tablets, no herbal remedies, nothing from the internet."
●Other health problems: "Nothing. No diabetes, no thyroid, no high blood pressure. My blood pressure was fine at the locum's."
●Allergies: "None."

Social History and Lifestyle Impact

●Work: Brendan uses the strimmer for four to five hours a day, with a short break at tea time. He has never been offered a hand check or health surveillance at work. "Nobody's ever asked me about my hands." If asked, the strimmer is an old petrol model that "buzzes like mad". The depot manager is decent, but Brendan has never wanted to make a fuss.
●Home: Lives with Lynette and Shaun. Lynette has been nagging him to ring the surgery.
●Smoking history, alcohol and caffeine: Smoked about 10 roll ups a day from his teens until he stopped five years ago, cold turkey after a few failed attempts. No vaping and no nicotine replacement. Around ten units of alcohol a week, mostly at the weekend. Four mugs of strong tea a day. No cannabis or other drugs.
●Mood: Better since the propranolol. He is still worried about the depot cutting jobs, but the panics have settled. No thoughts of harming himself.
●Availability to be seen: Finishes at half past three most days and could come to the surgery after work, or any weekday morning with a day's notice.

If Asked: Associated Symptoms

Gating note: Brendan answers these only when asked. Every one is negative unless stated.

●If asked about joint pain, swelling or stiffness, or muscle pain or weakness: "No. My knuckles are fine and I'm as strong as I've ever been, apart from the clumsiness."
●If asked about skin changes such as tight, shiny or thickened skin, rashes, or lumps under the skin: "No. The skin on my hands is rough from work but nothing else has changed."
●If asked about dry eyes or mouth, mouth ulcers, or hair loss: "No."
●If asked about difficulty swallowing, heartburn, or food sticking: "No. I eat anything."
●If asked about breathlessness or cough: "I get breathless when I'm panicking. Otherwise, no."
●If asked about headaches, weight loss, fever, night sweats or feeling unwell: "No. I feel well in myself."
●If asked about chest pain: "No. The panics were a racing heart, not pain."
●If asked about using his hands to check or describe them now: He says he would sooner be seen. "I'd rather you had a proper look than me trying to describe them. I can come in."

Responses to Management (The Negotiation Phase)

●
If the doctor explains that the propranolol may be contributing and the plan for it:
- ●Reaction: Anxious. "So it is the tablets? Can I just stop them? The panics were awful." If told not to stop suddenly and that it will be reviewed with a plan for the anxiety: "So you'd sort something else for the nerves first. All right, as long as I'm not left on my own with it." He asks, "Will the fingers go back to normal if I come off them?"
●
If the doctor links the symptoms with the strimmer and vibration:
- ●Reaction: Surprised. "The strimmer? It's only a bit of buzzing. I've used one for 30 years." Once the tingling is connected: "So that's the pins and needles. Is that permanent?" He worries about work. "I can't not strim. It's most of my job. What am I supposed to do?" If offered a letter, help to raise it with the manager, or occupational health: "Right. I'd probably ask about swapping jobs or a newer machine. Would it help if you wrote it down?"
●
If the doctor explains that blood tests are needed to look for other causes:
- ●Reaction: Worried. "What are you looking for? Is it something serious?" If told it is a routine check that is usually normal: "That's good, but what if it isn't normal?" He agrees to the bloods when given a clear reason and told when he will hear.
●
If the doctor discusses smoking and caffeine:
- ●Reaction: Proud, then thoughtful. "I packed in the roll ups five years ago and I haven't touched one since. Took me a few goes." If told that staying stopped is one of the best things he can do for the blood vessels in his fingers: "I'm not going back, though the panics did make me want one." If asked about vaping or patches: "No, nothing like that." He accepts an offer of support if he is ever tempted. On caffeine: "Four mugs of strong tea? That's me. I could try decaf in the afternoon."
●
If the doctor offers tablets for the fingers, gloves or other practical advice:
- ●Reaction: Interested. "Is there a tablet for it?" If told that it is often managed without tablets, and that medicines may be offered if bad: "I'd rather try gloves and so on first." About keeping warm: "I'll get some proper gloves and a heated hand warmer for the van. Does it matter if I wear gloves on the strimmer?"
●
If the doctor says he needs to be seen, or gives the outlook and safety netting:
- ●Reaction: Relieved to be taken seriously. "Yes, please. I can come after half three." If safety netting is vague, such as "come back if it gets worse": "Worse how? What would I be looking for? When do I need to ring?" He repeats the warning signs back when specific ones are given. He asks, "Will I lose my fingers?" and is reassured by a calm, honest answer.

Mark Scheme

Domain 1: Data Gathering and Diagnosis

0 / 16 indicators checked+0−0

Positive (0/8)

Negative (0/8)

Domain 2: Clinical Management and Medical Complexity

0 / 26 indicators checked+0−0

Positive (0/13)

Negative (0/13)

Domain 3: Relating to Others

0 / 14 indicators checked+0−0

Positive (0/7)

Negative (0/7)

Clinical Learning Points

The Core Dilemma and the Model Plan

●Brendan is 52 and has had three weeks of fingers going white, blue and then red in the cold, for the first time. A first attack in middle age is not simply primary Raynaud's phenomenon until proven otherwise. Two plausible contributors sit in the history: propranolol, started five weeks ago, and about 30 years of daily strimmer use. A connective tissue disease must still be screened for. The station tests whether the candidate finds all three threads and handles them in a sensible order.
●The model plan has six parts. Take a history that characterises the attacks and finds the drug, the vibration exposure and the tingling he dismissed. Screen for features of connective tissue disease. Arrange an in person examination, because the hands cannot be assessed by phone. Send baseline blood tests. Make a safe decision about propranolol and offer a better plan for the anxiety. Advise on vibration, cold and staying stopped smoking, with a letter or occupational health route for work. Close with referral thresholds, review in about two weeks and specific safety netting.
●Acceptable alternatives: examining first and sending bloods at that visit, rather than before it; stopping propranolol by a gradual taper, switching, or continuing it briefly with a firm review date; referring to rheumatology now or only if the examination or tests are abnormal; and starting a calcium channel blocker, if attacks are troublesome, after the other measures.

Raynaud's Phenomenon: Primary or Secondary

●Raynaud's phenomenon is episodic vasospasm of the digital arteries, classically a sequence of white, blue and then red, with numbness and then throbbing on recovery. Primary disease usually begins earlier in life, affects both hands symmetrically, causes no tissue damage and has a normal examination and normal tests.
●CKS notes that secondary disease is more likely if onset is over the age of 30, episodes are painful or asymmetrical, or there are complications such as ulceration. Other features include digital ulcers or pits, and symptoms of connective tissue disease such as joint pain, skin tightening, rash, dry eyes or mouth, dysphagia (difficulty swallowing), reflux, breathlessness or muscle weakness.
●Secondary causes to think of are systemic sclerosis (scleroderma), systemic lupus erythematosus, Sjögren's syndrome, other connective tissue disease, vibration injury, drugs, carpal tunnel syndrome and, less often, blood disorders and cervical rib. Brendan has no features of connective tissue disease on history, which makes it less likely but does not exclude it. Examination and a limited set of tests complete the screen.

Drug Triggers and Propranolol

●Drugs are a recognised secondary cause, so asking about everything he takes, including over the counter products, is part of the history. Brendan takes only cetirizine as needed.
●Propranolol was started for palpitations and panic episodes. NICE guidance on generalised anxiety disorder and panic disorder (CG113) offers self help, psychological therapy and, where needed, a selective serotonin reuptake inhibitor (SSRI) such as sertraline, and does not include beta blockers among its recommended treatments. The BNF lists anxiety with palpitation, sweating and tremor as an indication for propranolol, so it was not wrong to use it, but it also lists peripheral coldness and peripheral vascular disease among its common side effects, so it is a poor choice with a cold sensitive circulation.
●Do not tell him to stop it abruptly. The BNF advises gradual dose reduction when a beta blocker is stopped, as sudden cessation can cause rebound effects, and his panic symptoms need an alternative plan first. Another reasonable route is to agree the plan now and carry it out at the review.

Hand Arm Vibration Syndrome

●Hand arm vibration syndrome (HAVS) follows regular use of hand held vibrating tools and has two parts: a vascular part that looks like Raynaud's (attacks of blanching, often called vibration white finger), and a sensorineural part with tingling, numbness, reduced dexterity and weaker grip. Brendan's two years of fingertip pins and needles after strimming, new morning numbness, dropped mug and fumbling with buttons are the sensorineural part, and he has not connected them with his fingers going white.
●Risk depends on the vibration magnitude and daily trigger time. The Control of Vibration at Work Regulations 2005 set an exposure action value of 2.5 m/s2 A(8) and a limit value of 5.0 m/s2 A(8), both averaged over an 8 hour day. Employers must introduce measures to reduce exposure at the action value and must not exceed the limit value, and must provide health surveillance for those at risk. Four to five hours daily on an old petrol strimmer is likely to be high exposure, and Brendan has never had surveillance.
●The condition can progress if exposure continues, and the vascular part is often not reversible once established, so the advice is about preventing progression: shorter trigger times, regular breaks, better maintained or lower vibration equipment, a light grip, warm gloves and a change of task if symptoms advance.

Examination, Tests and Referral

●The examination, done in person, looks for digital ulcers or pitting, tight or shiny skin, telangiectasia (small dilated surface vessels), calcinosis, nail fold changes, joint swelling, radial and ulnar pulses, capillary refill, sensation, grip and dexterity, and blood pressure. The patient should not be asked to inspect or test his own hands by phone.
●CKS advises baseline blood tests of a full blood count, inflammatory markers, thyroid function and antinuclear antibodies (ANA); adding kidney function, liver function or urinalysis is reasonable but not required. A positive ANA, especially with symptoms or abnormal nail folds, calls for rheumatology review, where specific antibodies and nail fold capillaroscopy (microscopy of the nail fold vessels) are done. A negative ANA lowers the likelihood but does not remove the need for examination.
●CKS advises rheumatology referral for suspected secondary Raynaud's due to connective tissue disease, or for frequent and severe episodes. Signs of critical ischaemia, severe digital ulceration or infection need urgent same day assessment, as they can be a vascular emergency. Occupational health referral, or a letter to his employer, is appropriate for the vibration exposure.

Treatment of the Attacks

●First line is non drug: keep the whole body, not just the hands, warm; use insulated gloves, hand warmers and warm up before going out; avoid sudden temperature changes; cut down caffeine; stay active; and stay off cigarettes, because smoking narrows small vessels and worsens attacks. Brendan stopped five years ago, so the task is to recognise this, link staying stopped to his fingers, check that he uses no vape or nicotine replacement, and offer support if he is tempted to restart. The NICE tobacco guideline (NG209) stop smoking offer, including nicotine replacement, varenicline and a local stop smoking service, applies only if he relapses.
●If attacks stay troublesome or limit work after these measures, a dihydropyridine calcium channel blocker such as nifedipine is the usual first drug. CKS suggests oral nifedipine first line if bothersome symptoms persist despite lifestyle measures. The BNF dose for Raynaud's is 5 mg three times daily with immediate release, increased according to response to up to 20 mg three times daily, and common effects are flushing, headache, dizziness and ankle swelling. Review propranolol first, as the combination needs care (check the BNF interaction entry).
●Starting a vasodilator at once is not unsafe, but leaves the triggers in place.

Anxiety and Work

●Brendan's palpitations and panic began when his depot talked of cutting the team. Propranolol has helped, and he fears that stopping it will bring the panics back. Offering self help, psychological therapy through a local talking therapies service and, if symptoms persist, an SSRI is the NICE route.
●Work is part of both problems. Brendan can ask his manager to rotate tasks, reduce trigger time or supply a newer machine, and occupational health can arrange surveillance. A fit note stating that he may be fit for work with adjustments, or a short letter, helps if he is nervous about raising it. Under RIDDOR the employer, not the doctor, reports HAVS, once the employee gives them a doctor's written diagnosis, where the work involves regular use of vibrating power tools. Prescribed disease A11 (previously vibration white finger) is covered by industrial injuries disablement benefit if the job caused it.

Safety Netting, Follow Up and Common Mistakes

●Review in about two weeks with the examination findings and results. Tell him to ring the surgery the same day, or use urgent care out of hours, if a finger stays white, blue or painful after warming, if a sore, ulcer or blackened skin appears, or if he develops joint swelling, rash, tight skin, trouble swallowing or breathlessness. Offer a time to be seen that suits his shifts, after half past three.
●Common mistakes include treating this as primary Raynaud's at 52 without screening, missing the strimmer as the cause because he does not mention it, stopping propranolol on the spot or ignoring it, attempting a remote examination of his hands, ordering a wide autoimmune panel without a reason, starting nifedipine and nothing else, giving only warmth advice, advising him to stop smoking as if he still smoked, failing to give specific warning signs for a threatened finger, and ending the call without explaining why the blood tests are being done.

Mapped to the RCGP curriculum topic: Musculoskeletal Health.

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