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Venous ulcers

Background knowledge 🧠

Definition

  • Chronic wounds that occur due to improper functioning of the venous valves, leading to increased pressure in the veins, primarily of the lower extremities.

Pathophysiology

  • Increased venous pressure leading to fluid leakageΒ into the surrounding tissue.
  • Leaked red blood cells break down, causing skin discoloration and dermatitis.
  • Oxygen supply reduction and waste product accumulation lead to skin breakdown and ulceration.

Risk factors

  • Chronic venous insufficiency.
  • Deep vein thrombosis.
  • Varicose veins.
  • Obesity.
  • Previous leg injury.
  • Standing for long durations.
  • Advanced age.

Clinical Features πŸŒ‘️

Clinical features

  • Ulcers are typically shallow with irregular shape, commonly found on the medial malleolus of the ankle.
  • Surrounding skin may be swollen, discolouredΒ (haemosiderin staining), or hardened.
  • Associated with moderate to severe leg pain, especially when the leg is lowered.
  • Possible exudate or odour.

Investigations πŸ§ͺ

Tests

  • Doppler ultrasound: Assess venous flow and valve function.
  • Ankle-brachial pressure index (ABPI): Differentiate between venous and arterial ulcers.
  • Wound swab if infection is suspected.

Management πŸ₯Ό

Management

  • Compression therapy: Multilayer bandaging or stockings to promote venous return.
    • Ensure arterial disease has been excluded before commencing compression therapy.
  • Wound care: Regular cleaning, topical antimicrobials or silver sulfadiazine if infected, moisture-balancing dressing.
  • Pain management.
    • NSAIDs not recommended since they may impair healing.
  • Elevate the leg when possible to reduce swelling.
  • Encourage regular movement and walking.
  • Consider surgical interventions (e.g., endovenous laser treatment, vein stripping) if underlying varicose veins are present.

Prognosis

  • Can take several weeks to months to heal.Β Some may become chronic and not heal.
  • Recurrence is common if underlying venous insufficiency is not addressed.

Key Points

  • Venous ulcers generally occur around the medial malleolus/gaiter area and are usually superficial.
  • Compression therapy and good wound care are key to management and prevention.

References

National Institute for Health and Care Excellence (2021). Scenario: Venous Leg Ulcers. [online] NICE. Available at: https://cks.nice.org.uk/topics/leg-ulcer-venous/management/venous-leg-ulcers/.

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Consequences of lower limb venous insufficiency include which of the following?

This is a sign of severe arterial insufficiency.

Brown in colour, it is a byproduct of haemoglobin degradation.

A dermatological condition associated with diabetes mellitus, it may be mistaken for venous insufficiency. Lipodermatosclerosis, however, is associated with venous insufficiency.

This is found in Graves’ disease.

It occurs in diabetes mellitus as a consequence of peripheral neuropathy. Venous ulcers occur in venous insufficiency.


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