Journal List > J Korean Foot Ankle Soc > v.20(2) > 1043416

Gwak, Kim, Kim, Lee, and Lee: Risk Factors of Syme Amputation in Patients with a Diabetic Foot

Abstract

Purpose:

This study examined the factors affecting the treatment of diabetes mellitus foot patients who had undergone a Syme amputation.

Materials and Methods:

This study included 17 patients diagnosed with a diabetes mellitus foot and who had undergone a Syme amputation from January 2010 to January 2014. Some of the risk factors (age, body mass index [BMI], disease duration, smoking, ankle brachial index [ABI], HbA1c, serum albumin, total lymphocyte, C-reactive protein [CRP], and serum creatine) that affect the successful Syme amputation were analyzed.

Results:

The healing rate of a Syme amputation was significantly higher when the lymphocyte count was above 1,500 mm3 (p=0.029). The factors affecting the surgical outcome according to multivariate analysis were HbA1c and the BMI (p=0.014, p=0.013). Regarding reamputation, there was a significant difference with HbA1c, lymphocyte, and BMI (p=0.01, p=0.03, and p=0.01). No significant differences were observed with age, disease duration of diabetes mellitus, smoking, ABI, serum albumin, CRP, and serum creatine.

Conclusion:

The HbA1c level, BMI and total lymphocyte count are risk factors that must be considered for successful Syme amputation in patients with diabetic foot disease.

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Figure 1.
(A) A 59-year-old man had type II diabetes, amputated toes and skin necrosis. (B) Syme amputation was performed well and walk freely with prosthesis after healing.
jkfas-20-78f1.tif
Figure 2.
(A) A 62-year-old man had diabetic foot ulcer. (B) Below knee amputation was performed due to difficulty of infection control and laboratory abnormality.
jkfas-20-78f2.tif
Table 1.
Wound Features in Healed Group and Unhealed Group
Patient No. Group Sex Age (yr) Wound site Size* Cause
1 1 Male 54 Forefoot Small Necrosis
2 1 Male 50 Forefoot Small Ulcer, infection, necrosis
3 1 Male 58 Midfoot Middle Necrosis
4 1 Male 68 Midfoot Middle Infection, necrosis
5 1 Male 39 Midfoot Large Infection, necrosis
6 1 Male 57 Forefoot Small Infection, necrosis
7 1 Male 61 Forefoot Small Necrosis
8 1 Male 72 Forefoot Small Necrosis
9 1 Male 70 Midfoot Middle Infection, necrosis
10 1 Female 78 Midfoot Middle Infection, necrosis
11 1 Male 85 Midfoot Middle Infection
12 1 Male 66 Forefoot Small Necrosis
13 1 Female 46 Forefoot Middle Necrosis
14 2 Female 49 Midfoot Middle Infection
15 2 Female 70 Forefoot Middle Ulcer, infection, necrosis
16 2 Male 62 Midfoot Middle Infection, necrosis
17 2 Female 85 Forefoot Middle Infection, necrosis

Group 1: healed group, Group 2: unhealed group. *Small: <5 cm, middle: 5∼10 cm, large: >10 cm.

Table 2.
Rate of Healing by Divided Standard Value
Factor No. of patients Success of treatment (n) Rate of healing (%) p-value*
Age (yr) ≥65 8 6 75.0 0.665
<65 9 7 77.8
HbA1c (%) ≥8.0 12 8 66.7 0.208
<8.0 5 5 100.0
Albumin (g/dL) ≥2.5 13 11 84.6 0.219
<2.5 4 2 50.0
Smoking Yes 9 7 77.8 0.665
No 8 6 75.0
ABI ≥0.9 4 3 75.0 0.700
<0.9 13 10 76.9
BMI (kg/m2) ≥25.0 4 2 50.0 0.219
<25.0 13 11 84.6
Creatine (mg/dL) ≥1.2 9 7 77.7 0.665
<1.2 8 6 75.0
CRP (mg/L) ≥3.2 13 10 76.9 0.700
<3.2 4 3 75.0
Total lymphocyte (mm3) ≥1,500 8 8 100.0 0.029
<1,500 9 5 55.6
Wound site Forefoot 9 7 77.7 0.893
Midfoot 8 6 75.0

ABI: ankle brachial index, BMI: body mass index, CRP: C-reactive protein. *Statistical analysis by chi-square test.

Table 3.
Factors’ Effect to the Operative Outcome
Factor p-value*
Age 0.554
DM duration 0.917
HbA1c 0.014
Albumin 0.280
Smoking 0.663
ABI 0.841
BMI 0.013
Creatine 0.371
CRP 0.733
Total lymphocyte 0.052

DM: diabetes mellitus, ABI: ankle brachial index, BMI: body mass index, CRP: C-reactive protein. *Statistical analysis by multivariate analysis.

Table 4.
Values of Factors in Healed Group and Unhealed Group
Factor Group 1 Group 2 p-value
Age (yr) 61.8 66.5 0.55
DM duration (yr) 15.5 15.0 0.91
HbA1c (%) 8.5 10.7 0.01
Albumin (g/dL) 3.00 2.65 0.27
ABI 0.83 0.89 0.58
BMI (kg/m2) 20.3 27.6 0.01
Creatine (mg/dL) 2.1 1.1 0.14
CRP (mg/L) 9.4 7.2 0.73
Total lymphocyte (mm3) 1,540 1,010 0.03

Group 1: healed group, Group 2: unhealed group. DM: diabetes mellitus, ABI: ankle brachial index, BMI: body mass index, CRP: C-reactive protein.

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