Cold Injury Residuals C&P Exam Prep

Ankle-Brachial Index (ABI)

What it measures: Ratio of ankle systolic blood pressure to brachial (arm) systolic blood pressure; assesses peripheral arterial blood flow to lower extremities.

What to expect: A blood pressure cuff is placed on your ankle and arm. Ultrasound (Doppler probe) is used to measure systolic pressures at each site. The ankle pressure is divided by the arm pressure to produce the ABI ratio. This is typically performed bilaterally.

Pain considerations: If walking to the exam location or preparing for the test causes pain or increased symptoms, inform the examiner before the test begins. Document any claudication symptoms that occur during or after the test.

Transcutaneous Oxygen Tension (TcPO2)

What it measures: Measures the partial pressure of oxygen diffusing through the skin, used to assess microvascular perfusion in the feet - particularly relevant for cold injury residuals affecting small vessels.

What to expect: Small electrodes are placed on the skin surface of both feet (and sometimes the calf). The electrodes heat the skin slightly to increase blood flow. After a stabilization period of approximately 15-20 minutes, oxygen tension values are recorded. Results are reported in mmHg.

Pain considerations: The electrodes produce mild warmth which may cause temporary discomfort or an exacerbation of burning sensations if neuropathy or hypersensitivity is present. Inform the examiner immediately if the test causes significant pain.

Peripheral Pulse Assessment (Doppler and Palpation)

What it measures: Evaluates presence, quality, and symmetry of peripheral pulses at the radial, ulnar, femoral, popliteal, dorsalis pedis, and posterior tibial locations to identify arterial insufficiency from cold injury residuals.

What to expect: The examiner will physically palpate pulse points at your wrists, behind your knees, on top of your feet, and behind your ankles. A handheld Doppler ultrasound device may also be used to detect pulses that are too weak to feel by hand. Findings will be graded as normal, diminished, or absent.

Pain considerations: Palpation of sensitive areas affected by cold injury residuals may cause discomfort. Communicate pain levels clearly to the examiner during the examination.

Cold Sensitivity / Vasospasm Provocation (Clinical History)

What it measures: Assesses the frequency, severity, and triggers of vasospastic episodes (Raynaud's-like phenomena) that are a hallmark residual of cold injury, affecting small vessels of fingers and toes.

What to expect: This is primarily a history-taking component. The examiner will ask about color changes (white, blue, red sequence), triggers (cold weather, cold water, air conditioning), duration of episodes, frequency, and associated pain or numbness. Formal cold provocation testing is rarely performed in C&P exams.

Pain considerations: Describe the full pain experience during vasospastic episodes: burning, throbbing, deep aching, electric sensations, and whether the pain prevents you from continuing any activity.

20%

Mild cold injury residuals characterized by minimal symptoms. Includes superficial trophic changes such as beginning nail changes, beginning hair loss over the affected area, and beginning eczema of the affected extremity without significant functional impairment.

From 38 CFR: Beginning trophic changes such as nail changes and beginning eczema; mild cold sensitivity. Symptoms present but not significantly limiting daily activities or work.

40%

Moderate cold injury residuals with more pronounced trophic changes and vascular symptoms. Includes persistent trophic changes, recurring vasospastic episodes with color changes, persistent numbness or paresthesias, persistent eczema, and beginning subcutaneous tissue changes. Symptoms begin to limit some activities.

From 38 CFR: Persistent trophic changes, recurring vasospastic episodes with color changes (white-blue-red), persistent paresthesias limiting fine motor activities, and beginning subcutaneous induration. Moderate limitation of occupational and social activities.

60%

Moderately severe cold injury residuals with significant vascular and tissue changes. Includes severe vasospastic episodes lasting more than 2 hours each, persistent trophic changes with extensive eczema or subcutaneous induration, persistent edema incompletely relieved by elevation, and deep ischemic-type pain. Significant functional impairment of the affected extremity.

From 38 CFR: Vasospastic episodes occurring frequently and lasting an average of more than 2 hours each; persistent edema incompletely relieved by elevation; extensive trophic changes; severe limitation of use of the affected extremity. Work requiring use of the hands or feet is significantly limited.

100%

Severe cold injury residuals with tissue loss, persistent ulceration, necrosis, or massive board-like edema. Includes deep ischemic ulcers, necrosis of fingers or toes, massive board-like edema, persistent ulceration not healed, or loss of tissue. Complete or near-complete loss of use of the affected extremity or extremities.

From 38 CFR: Persistent ulceration, necrosis of tissue, massive board-like edema, deep ischemic ulcers; complete functional loss of the affected extremity or extremities. Inability to perform any gainful employment involving use of affected extremity.

Persistent Coldness of Extremities

How to describe it: Describe the affected extremities specifically (which fingers, toes, hands, feet), how the coldness feels (numb cold, painful cold, burning cold), whether it is constant or intermittent, what makes it worse (ambient temperature, cold water, air conditioning, refrigerated environments), and how it limits your ability to function at work or home.

Example: On my worst days, both feet feel like blocks of ice from the moment I wake up. Even indoors with socks on, I cannot feel the floor under my feet properly. I cannot walk to my mailbox in winter without my feet going completely numb within two minutes. I had to stop working as a [occupation] because I cannot be in cold environments or near air conditioning without triggering severe symptoms that last for hours.

Examiner listens for: Specific extremities affected, objective temperature asymmetry between injured and uninjured sides, correlation with cold exposure, impact on occupational functioning, duration and frequency of cold-related flares, and whether warming relieves or only partially relieves the symptoms.

Avoid: Do not say 'my feet get a little cold sometimes.' Instead, accurately describe the severity, frequency, and functional impact. Do not omit symptoms that embarrass you such as hyperhidrosis or skin breakdown.

Numbness and Paresthesias

How to describe it: Describe the exact location (tips of fingers, toes, entire foot, hand), character of the sensation (burning, electric shock, pins and needles, dead feeling, hypersensitivity to touch), when it occurs (constant, triggered by cold, worsened at night), and how it affects your ability to perform fine motor tasks, grip objects, walk safely, or sense hot and cold temperatures.

Example: On my worst days I cannot feel anything in my right hand from the fingertips to the knuckles. I have burned myself cooking because I could not feel the hot pan. I drop objects constantly and cannot button my shirt or use a keyboard for more than a few minutes without extreme burning sensations shooting up my fingers. At night the burning wakes me from sleep 3-4 times per week.

Examiner listens for: Distribution of numbness consistent with cold injury pattern (distal extremities), presence of nocturnal symptoms, impact on fine motor function, safety risks from impaired sensation, and whether neuropathic pain accompanies the numbness.

Avoid: Veterans often say 'some numbness' without specifying how it has caused burns, falls, dropped objects, or inability to perform job duties. Be specific and accurate about every real limitation.

Vasospastic Episodes (Raynaud's-like Phenomena)

How to describe it: Describe the sequence of color changes (white/pallor, then blue/cyanosis, then red/rubor) in your fingers or toes, what triggers the episodes (cold air, cold water, emotional stress, touching a cold surface), how long each episode lasts, how frequently they occur, the level of pain during and after each episode, and what you must do to recover (rewarming, activity restrictions).

Example: On my worst days in winter, I have 4-6 episodes per day. Each one starts when I go outside or even open the refrigerator. My fingers go white and completely numb, then turn bluish-purple with intense throbbing pain, then bright red with a burning sensation as blood returns. Each episode lasts 2-3 hours. During an episode I cannot grip anything, type, drive, or work. I have had to leave work early multiple times because of this.

Examiner listens for: Classic triphasic color change sequence, episode duration (critical threshold is over 2 hours per episode for higher rating levels), frequency, triggers, level of associated pain, and functional work limitation. The examiner will specifically note whether episodes average more than 2 hours each as this is a rating threshold under DC 7122.

Avoid: Do not minimize episode duration. If episodes truly last 2+ hours, say so clearly. Do not fail to mention how many episodes occur per day or week. Do not omit the impact on work - this is critical for functional assessment.

Pain - Burning, Aching, and Rest Pain

How to describe it: Describe pain using specific descriptors: burning, throbbing, deep aching, electric, stabbing, or pressure-like. Identify the location precisely. State whether pain is present at rest, with activity, or both. Describe your worst day pain intensity on a 0-10 scale, your average pain, what aggravates it (cold, activity, standing, walking), what partially relieves it, and how pain affects sleep, work, and daily activities.

Example: On my worst days, I have a constant deep burning pain in both feet that I rate 8/10. It is present even at rest, lying in bed. It prevents me from sleeping more than 2-3 hours at a time. Any walking more than half a block causes the pain to spike to 9-10/10. I have to keep my feet elevated for 45 minutes after any standing activity. I cannot stand at a job or even cook a full meal without needing to sit down due to pain.

Examiner listens for: Presence of rest pain (indicator of severe ischemia), pain triggered by ambulation suggesting claudication, relationship between pain and cold exposure, sleep disruption, and accurate description of activities limited by pain. Examiner looks for consistency between reported pain and physical findings.

Avoid: Veterans often say 'it bothers me' or 'I manage.' Instead, clearly and accurately describe your worst days per M21-1 guidance. Do not say you 'manage fine' if you have significantly modified your activities, changed careers, or stopped doing things you used to do.

Trophic Changes and Skin/Nail Changes

How to describe it: Describe any visible changes to the skin, nails, or hair in the affected areas: nail thickening, nail discoloration, nail brittleness, loss of toenails or fingernails, loss of hair on toes or fingers, skin thinning or atrophy, skin discoloration (redness, mottling, cyanosis), chronic eczema, hyperhidrosis, subcutaneous hardening (induration), or scarring from prior tissue loss.

Example: The nails on four of my right toes have become so thickened and discolored that a podiatrist trims them because I cannot do it myself. I have lost all hair on my right foot up to mid-calf. The skin on my toes is shiny and tight, and it cracks open in winter, requiring wound care. I had a non-healing sore on my left big toe for 8 months that required a wound clinic.

Examiner listens for: Objective visual confirmation of trophic changes during physical examination, presence of active wounds or healed scars from prior ulceration, distribution consistent with prior cold injury pattern, and documentation of changes in medical records over time.

Avoid: Do not assume the examiner will notice all skin and nail changes on a brief exam. Point out every trophic change proactively. Bring photographs of past skin breakdown, ulcers, or severe nail changes if available.

Edema and Swelling

How to describe it: Describe whether swelling is constant or intermittent, which extremities are affected, how much swelling occurs (ankles, feet, hands), time of day it is worst, whether elevation relieves it fully or only partially, whether you use compression stockings or other devices, and how swelling limits mobility, ability to wear shoes, or perform work.

Example: On my worst days my left foot and ankle swell so much that I cannot fit into my shoe by afternoon. Even after elevating my leg for an hour, it only partially goes down. I have had to buy shoes 1.5 sizes larger than my right foot. The swelling causes tightness and aching that prevents me from standing or walking for more than 15-20 minutes continuously.

Examiner listens for: Distinction between edema that is fully versus incompletely relieved by elevation (critical rating threshold), whether edema is pitting or non-pitting, whether board-like induration is present, presence of secondary skin changes from chronic edema, and use of compression garments.

Avoid: Do not say swelling 'goes away with rest' if it only partially subsides. The distinction between complete and incomplete relief by elevation is a specific rating threshold - report your experience accurately and precisely.