Using Compression Therapy in Complex Situations
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Clinical PRACTICE DEVELOPMENT Clinical PRACTICE DEVELOPMENT Using compression therapy in complex situations Patients presenting with ulceration will often have other chronic illnesses such as diabetes mellitus and osteoarthritis. Compression therapy remains the mainstay of treatment for the majority of these patients, although in some it will be contraindicated. This article stresses the importance of assessment of ulcer aetiology and will discuss the treatment of patients with ulceration who have complex health needs, including those with diabetes, rheumatoid arthritis, haematological problems such as sickle cell anaemia, cardiac problems, and wounds caused by trauma. Christine Moffatt Patients with diabetes KEY WORDS Many textbooks state that Table 1 Compression therapy compression therapy should not be Factors affecting wound healing Ulceration used in patients with diabetes. This Diabetes is because of the risk of concurrent Rheumatoid arthritis peripheral arterial occlusive disease 8 Peripheral arterial occlusive disease that leads to reduced perfusion and low oxygen levels Sickle cell anaemia and the concern that sensory neuropathy will prevent a patient from that result in tissue breakdown and gangrene Pre-tibial crest injuries detecting whether the compression is (Kite and Powell, 2007) causing trauma. However, patients with 8 Smoking is a major risk factor for peripheral diabetes are just as likely to suffer vascular disease (PVD) (Burns et al, 2003). In here is increasing evidence that from a venous ulcer as those without. addition to its role in accelerating arterial the proportion of patients with disease, it is also a potent vasoconstrictor, complex ulceration is increasing Such patients with venous further reducing local tissue oxygen perfusion T 8 (Moffatt et al, 2004). There may ulceration require compression Poor immune function, placing the patient be many reasons for this, the most therapy and, providing their condition at risk of overwhelming infection (Kite and important factor being the increase in is stable, they may heal uneventfully. Powell, 2007). peripheral arterial occlusive disease in Others may take longer to heal, 8 Reduced neutrophil activity increases the the very elderly (Morison et al, 2007). although the exact reason for risk of opportunistic bacteria causing severe As age increases, so does the chance the delay may not be obvious infection (Edmonds, 2007). of having other chronic illnesses such (Marston, 2007). 8 Increased risk of infection with a blood as diabetes mellitus and osteoarthritis. glucose of > 7 mmol/l (International Working Identification of the ulcer aetiology There are a number of factors Group on the Diabetic Foot, 2003). remains a key priority of assessment. thought to affect wound healing in the 8 Patients with two or more factors The true role that other health patient with diabetes (Table 1), who complicating the ulcer aetiology issues play in ulcer healing is often frequently present with other medical (International Working Group on the difficult to determine. Nevertheless, conditions or complications Diabetic Foot, 2003) compression therapy remains the of diabetes. 8 Reduced serum albumin levels of < 30 gm/dl mainstay of treatment for the majority due to infection, starvation, renal failure or of these patients despite their complex Assessment issues acute stress (International Working Group on healthcare needs and healing can be To use compression safely and the Diabetic Foot, 2003) achieved, although more slowly, in effectively, a number of issues 8 Other diabetic complications, such as many cases. must be addressed within a retinopathy and nephropathy, are important comprehensive, structured assessment. indicators that delayed wound healing may If there is any doubt, the patient occur (International Working Group on the Christine Moffatt is Honorary Professor in Nursing and Diabetic Foot, 1999). Health Care, Glasgow University and Co-Director of the should be referred for a specialist Centre for Research and Implementation of Clinical opinion before treatment with Practice (CRICP), London compression commences. 84 Wounds UK, 2008, Vol 4, No 4 p84-94moffatok.indd 30 29/10/08 00:14:01 Clinical PRACTICE DEVELOPMENT Clinical PRACTICE DEVELOPMENT vessels rarely occurs, therefore, it gives a more accurate assessment of the arterial status 8 If the arterial status of the patient cannot be determined, specialist referral for further vascular assessment should be made. Assessment of peripheral neuropathy Neuropathy occurs in the majority of patients with diabetes (Edmonds, 2007). This places the patient at risk of callus Figure 1. The at-risk diabetic foot, with hallux formation and foot ulceration due to valgus, crowded toes and callus formation over the changed biomechanics of the foot the metatarsal heads. that cause areas of high pressure and friction (Figure 1). Regular assessment of neuropathy using a 10 g monofilament should be undertaken in all patients with diabetes. In addition, it is important to pay particular attention to: 8 Areas at risk of pressure damage from compression 8 Areas of callus formation or previous foot ulceration 8 Foot deformities, eg. hammer toes, Figure 3. Deep pressure necrosis. hallux valgus, Charcot deformity, prominent metatarsal heads, dropped arch 8 Toes, interdigital infection, emboli (Figure 2) 8 Joint function 8 Quality of the skin and signs of trauma 8 Nails, nail deformities and infection 8 Footwear. Figure 2. Arterial emboli. Removal of callus Figure 4. Heel pressure ulcer. Callus formation can be rapid, The following key priorities relate particularly in patients suffering from to the safe use of compression in hyperglycaemia. Common areas of patients with diabetes. callus formation are over the plantar surface of the foot, particularly where Exclusion of peripheral arterial occlusive disease there are exposed metatarsal heads. A patient’s arterial status should be Compression bandaging traditionally assessed using a clinical history and extends to the base of the toes. Doppler ultrasound. Recording a This will mean that the compression resting pressure index in a patient with is applied over this area acting as a diabetes can be difficult, due to: secondary source of pressure and 8 Calcification of the arteries which friction. The callus area may need to prevents the artery from being remain exposed to avoid this risk and occluded. As a result, a false, to allow for the regular removal of very high systolic pressure is callus by the diabetic podiatrist. recorded which does not give an accurate picture of the patient’s Identification of sub-keratotic haematoma arterial status If the patient has neuropathic foot 8 Toe pressure may be useful in this ulceration or evidence of haemorrhage group as calcification of the toe Figure 5. Crowding of toes. below the callus, compression should Wounds UK, 2008, Vol 4, No 4 85 p84-94moffatok.indd 31 29/10/08 00:14:03 Clinical PRACTICE DEVELOPMENT Clinical PRACTICE DEVELOPMENT not be applied without specialist advice. These patients require an urgent specialist referral to the diabetic team and debridement by the diabetic podiatrist Foot deformities and pressure damage Foot deformities, such as claw toes, hammer toes, prominent hallux valgus (bunions) and bunionettes are all areas at risk of compression damage. Other neuropathic changes include loss of the small intrinsic muscles and subcutaneous tissue in the forefoot area. High compression can result Figure 6. Charcot foot deformity. in deep pressure necrosis over the dorsum of the foot (Figure 3). The Footwear extensor tendon may be prominent, It is vital to assess the patient’s requiring extra protection. footwear. Patients with neuropathy are frequently found to be wearing shoes The area of the heel is rarely that are too tight and the feet should described as an area that is associated be checked for signs of pressure with compression damage. However, damage (Edmonds, 2007). When compression may exacerbate the risk compression is being considered, it of heel pressure ulceration in immobile is important to assess how this will patients who keep their limb in the influence their regular footwear. same position for long periods of time (Figure 4). The loss of sensation Previous history of foot ulceration prevents these patients from being Specialist advice should be sought alerted to the need to change position. before applying compression to patients with a previous history of While compression bandaging foot ulceration or those wearing should not extend over the toes, custom-made shoes. It is vital that care must be taken to ensure that the compression does not become compression will not exacerbate toe wrinkled when the foot is placed deformities or cause tissue damage. in the shoe, as the patient with Crowding and overlapping of toes neuropathy will be unable to tell if Figure 7. Vasculitic ulceration associated with are common problems leading to damage is occurring. rheumatoid arthritis. interdigital pressure ulceration with increased risk of infection (Figure 5). Contraindications to compression therapy Patients with a reduced ankle to brachial pressure There are a number of clinical index (ABPI) Reduced mobility situations when compression should Although reduced compression is Many factors influence the mobility not be used in a patient with diabetes recommended for patients without of these patients. Reduced ankle except under specialist supervision. diabetes with a reduced ABPI of 0.6– movement is a common problem. 0.8,