ContextAmong persons diagnosed as having diabetes mellitus, the prevalence
of foot ulcers is 4% to 10%, the annual population-based incidence is 1.0%
to 4.1%, and the lifetime incidence may be as high as 25%. These ulcers frequently
become infected, cause great morbidity, engender considerable financial costs,
and are the usual first step to lower extremity amputation.ObjectiveTo systematically review the evidence on the efficacy of methods advocated
for preventing diabetic foot ulcers in the primary care setting.Data Sources, Study Selection, and Data ExtractionThe EBSCO, MEDLINE, and the National Guideline Clearinghouse databases
were searched for articles published between January 1980 and April 2004 using
database-specific keywords. Bibliographies of retrieved articles were also
searched, along with the Cochrane Library and relevant Web sites. We reviewed
the retrieved literature for pertinent information, paying particular attention
to prospective cohort studies and randomized clinical trials.Data SynthesisPrevention of diabetic foot ulcers begins with screening for loss of
protective sensation, which is best accomplished in the primary care setting
with a brief history and the Semmes-Weinstein monofilament. Specialist clinics
may quantify neuropathy with biothesiometry, measure plantar foot pressure,
and assess lower extremity vascular status with Doppler ultrasound and ankle-brachial
blood pressure indices. These measurements, in conjunction with other findings
from the history and physical examination, enable clinicians to stratify patients
based on risk and to determine the type of intervention. Educating patients
about proper foot care and periodic foot examinations are effective interventions
to prevent ulceration. Other possibly effective clinical interventions include
optimizing glycemic control, smoking cessation, intensive podiatric care,
debridement of calluses, and certain types of prophylactic foot surgery. The
value of various types of prescription footwear for ulcer prevention is not
clear.ConclusionsSubstantial evidence supports screening all patients with diabetes to
identify those at risk for foot ulceration. These patients might benefit from
certain prophylactic interventions, including patient education, prescription
footwear, intensive podiatric care, and evaluation for surgical interventions.

/pdf/preventing-foot-ulcers-in-patients-with-diabetes-1mnv6pfu8d.pdf

Preventing Foot Ulcers in Patients With Diabetes

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(05)67698-2.pdf

The global burden of diabetic foot disease

Foot ulceration is the most common lower-extremity complication in patients with diabetes mellitus. This review considers the pathogenesis, treatment, and management of diabetic foot ulcers, including prevention of recurrence.

https://www.nejm.org/doi/suppl/10.1056/NEJMra1615439/suppl_file/nejmra1615439_appendix.pdf

Diabetic Foot Ulcers and Their Recurrence

Diabetes is a group of chronic diseases characterized by hyperglycemia. Modern medical care uses a vast array of lifestyle and pharmaceutical interventions aimed at preventing and controlling hyperglycemia. In addition to ensuring the adequate delivery of glucose to the tissues of the body, treatment of diabetes attempts to decrease the likelihood that the tissues of the body are harmed by hyperglycemia.

The importance of protecting the body from hyperglycemia cannot be overstated; the direct and indirect effects on the human vascular tree are the major source of morbidity and mortality in both type 1 and type 2 diabetes. Generally, the injurious effects of hyperglycemia are separated into macrovascular complications (coronary artery disease, peripheral arterial disease, and stroke) and microvascular complications (diabetic nephropathy, neuropathy, and retinopathy). It is important for physicians to understand the relationship between diabetes and vascular disease because the prevalence of diabetes continues to increase in the United States, and the clinical armamentarium for primary and secondary prevention of these complications is also expanding.

### Diabetic retinopathy

Diabetic retinopathy may be the most common microvascular complication of diabetes. It is responsible for ∼ 10,000 new cases of blindness every year in the United States alone.1 The risk of developing diabetic retinopathy or other microvascular complications of diabetes depends on both the duration and the severity of hyperglycemia. Development of diabetic retinopathy in patients with type 2 diabetes was found to be related to both severity of hyperglycemia and presence of hypertension in the U.K. Prospective Diabetes Study (UKPDS), and most patients with type 1 diabetes develop evidence of retinopathy within 20 years of diagnosis.2,3 Retinopathy may begin to develop as early as 7 years before the diagnosis of diabetes in patients with type 2 diabetes.1 There are several proposed pathological mechanisms by which diabetes may lead …

https://clinical.diabetesjournals.org/content/diaclin/29/3/116.full.pdf

Microvascular and Macrovascular Complications of Diabetes

The diabetic neuropathies are heterogeneous, affecting different parts of the nervous system that present with diverse clinical manifestations. They may be focal or diffuse. Most common among the neuropathies are chronic sensorimotor distal symmetric polyneuropathy (DPN) and the autonomic neuropathies. DPN is a diagnosis of exclusion. The early recognition and appropriate management of neuropathy in the patient with diabetes is important for a number of reasons. 1 ) Nondiabetic neuropathies may be present in patients with diabetes. 2 ) A number of treatment options exist for symptomatic diabetic neuropathy. 3 ) Up to 50% of DPN may be asymptomatic, and patients are at risk of insensate injury to their feet. As >80% of amputations follow a foot ulcer or injury, early recognition of at-risk individuals, provision of education, and appropriate foot care may result in a reduced incidence of ulceration and consequently amputation. 4 ) Autonomic neuropathy may involve every system in the body. 5 ) Autonomic neuropathy causes substantial morbidity and increased mortality, particularly if cardiovascular autonomic neuropathy (CAN) is present. Treatment should be directed at underlying pathogenesis. Effective symptomatic treatments are available for the manifestations of DPN and autonomic neuropathy.

This statement is based on two recent technical reviews (1,2), to which the reader is referred for detailed discussion and relevant references to the literature.

An internationally agreed simple definition of DPN for clinical practice is “the presence of symptoms and/or signs of peripheral nerve dysfunction in people with diabetes after the exclusion of other causes” (3). However, the diagnosis cannot be made without a careful clinical examination of the lower limbs, as absence of symptoms should never be assumed to indicate an absence of signs. This definition conveys the important message that not all patients with peripheral nerve dysfunction have a neuropathy caused by diabetes. Confirmation can be established with …

/pdf/diabetic-neuropathies-a-statement-by-the-american-diabetes-f48b21t23v.pdf

Diabetic neuropathies: a statement by the American Diabetes Association.

Aims To determine the incidence of, and clinically relevant risk factors for, new foot ulceration in a large cohort of diabetic patients in the community healthcare setting.

Methods Diabetic patients (n = 9710) underwent foot screening in six districts of North-west England in various healthcare settings. All were assessed at baseline for demographic information, medical and social history, neuropathy symptom score, neuropathy disability score, cutaneous pressure perception (insensitivity to the 10 g monofilament), foot deformities, and peripheral pulses. Two years later, patients were followed up via postal questionnaire to determine the incidence of new foot ulcers. Cox’s proportional hazards regression analysis was used to determine the independent, relative risk of baseline variables for new foot ulceration.

Results New foot ulcers occurred in 291/6613 patients who completed and returned their 2-year follow-up questionnaire (2.2% average annual incidence). The following factors were independently related to new foot ulcer risk: ulcer present at baseline (relative risk (95% confidence interval)) 5.32 (3.71–7.64), past history of ulcer 3.05 (2.16–4.31), abnormal neuropathy disability score (≥ 6/10) 2.32 (1.61–3.35), any previous podiatry attendance 2.19 (1.50–3.20), insensitivity to the 10 g monofilament 1.80 (1.36–2.39), reduced pulses 1.80 (1.40–2.32), foot deformities 1.57 (1.22–2.02), abnormal ankle reflexes 1.55 (1.01–2.36) and age 0.99 (0.98–1.00).

Conclusions More than 2% of community-based diabetic patients develop new foot ulcers each year. The neuropathy disability score, 10 g monofilament and palpation of foot pulses are recommended as screening tools in general practice.

The North-West Diabetes Foot Care Study: incidence of, and risk factors for, new diabetic foot ulceration in a community-based patient cohort.

Aims To compare the risk of and risk factors for diabetes-related amputation in South Asians and Europeans.



Methods This was a population-based case control study based in the health districts of Bolton, Oldham and Central Manchester in the UK. Cases with diabetes-related amputation performed between 1992 and 1997 (n = 172) and controls with diabetes and no amputation (n = 376) were selected from the primary care-based North-west Diabetes Foot Study database. Risk factor data were also collected.



Results Age at diagnosis adjusted odds ratio (OR) of amputation in South Asians compared with Europeans was 0.26, 95% confidence interval (CI) 0.11–0.65, P = 0.004. In the control population, South Asians were less likely than Europeans to have peripheral vascular disease (PVD) (9% vs. 24%, P = 0.02), neuropathy (30% vs. 54%, P = 0.003), and less likely to have ever been smokers (31% vs. 57%, P = 0.03). When these factors were added to the model, the OR was attenuated to 0.84, 95% CI 0.23–3.08, P = 0.8.



Conclusions South Asians with diabetes have about a quarter of the risk of amputation of Europeans. This is mostly explained by low rates of PVD and neuropathy in South Asians, in part associated with low rates of smoking. The reasons for the South Asian protection from both PVD and neuropathy deserve further exploration.



Diabet. Med. 19, 99–104 (2002)

P. Widdows

Papers

The North-West Diabetes Foot Care Study: incidence of, and risk factors for, new diabetic foot ulceration in a community-based patient cohort.

Risk of diabetes-related amputation in South Asians vs. Europeans in the UK

Risk of diabetes related amputation in South Asians versus Europeans in the UK: A case control study