Biomechanical Properties of the Foot Sole in Diabetic Mellitus Patients

2014 ◽  
Vol 3 (1) ◽  
pp. 1-17 ◽  
Author(s):  
V. B. Narayanamurthy ◽  
Richa Poddar ◽  
R. Periyasamy
Keyword(s):  
Pressure Distribution ◽  
Biomechanical Properties ◽  
Distribution Parameter ◽  
Diabetic Patients ◽  
Ulcer Formation ◽  
Wear Properties ◽  
History Of ◽  
Protective Sensation ◽  
Index Value ◽  
Loss Of Protective Sensation

This aricle evaluates and quantifies the biomechanical properties of the foot sole like – loss of protective sensation, hardness of the foot sole and pressure distribution parameter called Power ratio (PR) and its alterations, which have a direct effect on ulcer formation. A new parameter PRS Index is developed to understand the interplay between these parameters and its role in ulcer formation. All diabetic subjects attending the Diabetic foot clinic from Dec2003 to June 2007 undergo a standard foot examination.A total of 652 diabetic patients including 57 ulcer patients are taken for our study. The biomechanical properties include loss of protective sensation (LOPS) which is measured by 10 gm Semmes Weinstein Monofilament (SWMF). Hardness of the foot sole or absence of suppleness is tested using the Durometer (ASTM-D 2240 standards). Plantar pressure measurement is done using the PedoPowerGraph(p) which measures pressure distribution parameter PR. Foot wear properties like hardness of the insole affecting the formation of plantar ulcers was also measured. The above mentioned important parameters can be measured objectively and calculate PRS index value for diabetic with history of previous ulcer patients. We found a single entity of either the PR or shore independently cannot predict the risk for ulcer formation.In this study we found newPRS index value for diabetic with history of previous ulcer patients show significant correlation (i.e. p<0.05 level) between footwear shore and PRS index for history of previous ulcer patients. No significant correlation was shown for diabetic without history of previous ulcer patients and this may be due to diabetic patients are wearing footwear randomly with different degree Shore. From the case studies we found that the PRS index values and other biomechanical parameter of the foot sole can be reversed if the patients wear proper MCR footwear with 20 degree Shore. Use of appropriate footwear has shown that these easily measurable parameters and thus prevent ulcer formation as mentioned in the earlier studies. Several methods are used previously for predicting ulceration in DM patients. But in this study the new index PRS was studied and its role in predicting ulceration. Use of appropriate footwear will reverse the hypertrophic response; this can be quantified by the PRS index. We have found that there is decrease in PRS index by proper off loading the pressure using 20-degree shore MCR footwear.

Biomechanical Properties of the Foot Sole in Diabetic Mellitus Patients

2018 ◽  
pp. 444-460
Author(s):  
V. B. Narayanamurthy ◽  
Richa Poddar ◽  
R. Periyasamy
Keyword(s):  
Pressure Distribution ◽  
Biomechanical Properties ◽  
Distribution Parameter ◽  
Diabetic Patients ◽  
Ulcer Formation ◽  
Hypertrophic Response ◽  
History Of ◽  
Protective Sensation ◽  
Index Value ◽  
Loss Of Protective Sensation

This aricle evaluates and quantifies the biomechanical properties of the foot sole like – loss of protective sensation, hardness of the foot sole and pressure distribution parameter called Power ratio (PR) and its alterations, which have a direct effect on ulcer formation. A new parameter PRS Index is developed to understand the interplay between these parameters and its role in ulcer formation. All diabetic subjects attending the Diabetic foot clinic from Dec2003 to June 2007 undergo a standard foot examination. A total of 652 diabetic patients including 57 ulcer patients are taken for our study. The biomechanical properties include loss of protective sensation (LOPS) which is measured by 10 gm Semmes Weinstein Monofilament (SWMF). Hardness of the foot sole or absence of suppleness is tested using the Durometer (ASTM-D 2240 standards). Plantar pressure measurement is done using the PedoPowerGraph(p) which measures pressure distribution parameter PR. Foot wear properties like hardness of the insole affecting the formation of plantar ulcers was also measured. The above mentioned important parameters can be measured objectively and calculate PRS index value for diabetic with history of previous ulcer patients. We found a single entity of either the PR or shore independently cannot predict the risk for ulcer formation. In this study we found new PRS index value for diabetic with history of previous ulcer patients show significant correlation (i.e. p<0.05 level) between footwear shore and PRS index for history of previous ulcer patients. No significant correlation was shown for diabetic without history of previous ulcer patients and this may be due to diabetic patients are wearing footwear randomly with different degree Shore. From the case studies we found that the PRS index values and other biomechanical parameter of the foot sole can be reversed if the patients wear proper MCR footwear with 20 degree Shore. Use of appropriate footwear has shown that these easily measurable parameters and thus prevent ulcer formation as mentioned in the earlier studies. Several methods are used previously for predicting ulceration in DM patients. But in this study the new index PRS was studied and its role in predicting ulceration. Use of appropriate footwear will reverse the hypertrophic response; this can be quantified by the PRS index. We have found that there is decrease in PRS index by proper off loading the pressure using 20-degree shore MCR footwear.

Symptomatic Reversal of Peripheral Neuropathy in Patients with Diabetes

2002 ◽  
Vol 92 (3) ◽  
pp. 125-130 ◽  
Author(s):  
Alan B. Kochman ◽  
Dale H. Carnegie ◽  
Thomas J. Burke
Keyword(s):  
Peripheral Neuropathy ◽  
Near Infrared ◽  
Diabetic Patients ◽  
Cold Sensation ◽  
Noninvasive Treatment ◽  
Patients With Diabetes ◽  
Protective Sensation ◽  
Loss Of Protective Sensation ◽  
Drug Free ◽  
Sensation Loss

Forty-nine consecutive subjects with established diabetic peripheral neuropathy were treated with monochromatic near-infrared photo energy (MIRE) to determine if there was an improvement of sensation. Loss of protective sensation characterized by Semmes-Weinstein monofilament values of 4.56 and above was present in 100% of subjects (range, 4.56 to 6.45), and 42 subjects (86%) had Semmes-Weinstein values of 5.07 or higher. The ability to discriminate between hot and cold sensation was absent (54%) or impaired (46%) in both groups prior to the initiation of MIRE treatment. On the basis of Semmes-Weinstein monofilament values, 48 subjects (98%) exhibited improved sensation after 6 treatments, and all subjects had improved sensation after 12 treatments. Therefore, MIRE may be a safe, drug-free, noninvasive treatment for the consistent and predictable improvement of sensation in diabetic patients with peripheral neuropathy of the feet. (J Am Podiatr Med Assoc 92(3): 125-130, 2002)

Testing for Loss of Protective Sensation in Patients with Foot Ulceration

2005 ◽  
Vol 95 (5) ◽  
pp. 469-474 ◽  
Author(s):  
William A. Wood ◽  
Michael A. Wood ◽  
Scott A. Werter ◽  
Joseph J. Menn ◽  
Scott A. Hamilton ◽  
...  
Keyword(s):  
At Risk ◽  
Diabetic Neuropathy ◽  
Cross Sectional ◽  
Actual Measurement ◽  
Foot Ulceration ◽  
Pressure Threshold ◽  
Static Touch ◽  
History Of ◽  
Protective Sensation ◽  
Loss Of Protective Sensation

Current recommendations for the prevention of foot ulceration and amputation include screening at-risk individuals by testing for loss of protective sensation at eight sites using 10-g (5.07) nylon monofilaments. Yet measurement of the cutaneous pressure threshold to differentiate one-point from two-point static touch stimuli may allow identification of these at-risk individuals earlier in the clinical course of diabetic neuropathy. The present study tested this hypothesis using a prospective, cross-sectional, multicenter design that included sensibility testing of 496 patients with diabetic neuropathy, 17 of whom had a history of ulceration or amputation. Considering the cutaneous pressure threshold of the 5.07 Semmes-Weinstein nylon monofilament to be equivalent to the 95 g/mm2 one-point static touch measured using the Pressure-Specified Sensory Device (Sensory Management Services LLC, Baltimore, Maryland), only 3 of these 17 patients with a history of foot ulceration or amputation would have been identified using the Semmes-Weinstein nylon monofilament screening technique. In contrast, using the Pressure-Specified Sensory Device, all 17 patients were identified as having abnormal sensibility, defined as greater than the 99% confidence limit for age, for two-point static touch on the hallux pulp. We conclude that patients at risk for foot ulceration can best be identified by actual measurement of the cutaneous sensibility of the hallux pulp. (J Am Podiatr Med Assoc 95(5): 469–474, 2005)

Sensory Thresholds of Normal Human Feet

2000 ◽  
Vol 21 (6) ◽  
pp. 501-504 ◽  
Author(s):  
Clifford Jeng ◽  
James Michelson ◽  
Mark Mizel
Keyword(s):  
Diabetic Patients ◽  
Sensory Threshold ◽  
Hereditary Neuropathy ◽  
Sensory Thresholds ◽  
Threshold Response ◽  
Positive Threshold ◽  
History Of ◽  
Protective Sensation ◽  
The Right ◽  
Foot Sensation

Hypotheses/Purpose: Although several studies in the literature have evaluated the abnormal sensory thresholds of diabetic feet to Semmes-Weinstein monofilament testing, there is very limited data on the sensory thresholds of individuals without diabetes or peripheral neuropathy. The purpose of this study was to assess the dorsal and plantar sensation of the feet from 40 healthy, college-aged volunteers using Semmes-Weinstein monofilaments. Conclusions/Significance: Semmes-Weinstein testing is a useful tool in predicting which diabetic patients may be at risk for ulceration of the feet. Several studies have determined 5.07 to be the threshold for protective sensation. Based on the normal values derived in this study, the inability to feel a Semmes-Weinstein monofilament of 5.07 (as in diabetic neuropathy) represents a sensory threshold that is more than 50 times greater than normal. This means that roughly 98% of the sensory ability has been lost. Methods: 20 male and 20 female volunteers between the ages of 18 to 22 years old were selected. None had a history of any significant injury or previous surgery to the foot or ankle. There were no known medical conditions associated with decreased foot sensation, (e.g.- diabetes, syphilis, leprosy, myelomeningocele, syringomyelia, or hereditary neuropathy). Volunteers were also questioned regarding participation in athletic activities. The subjects were blindfolded with the leg resting comfortably on a chair as 14 plantar and 5 dorsal locations were tested on each foot. The right foot was always tested first. Each site on the foot had the Semmes-Weinstein monofilaments applied to it first, in an order of increasing stiffness, then repeated in decreasing order, using all twenty monofilaments in the set. A positive threshold response was recorded when the subject could feel the filament and could accurately locate where on the foot the stimulus had been applied. The left foot was then tested in an identical fashion. Results: The mean sensitivity for all sites was 3.63 (0.0075 SEM). There were significant differences between sites, between using increasing or decreasing monofilament stiffness, between subjects, and in some instances, between right foot and left foot values. When testing was performed from the higher to lower monofilament stiffness, subjects were found to have significantly better sensitivity, which indicates the importance of a consistent testing protocol (either all up or all down). Sensation in the lesser toes and the arch were the most sensitive followed by the hallux and the plantar metatarsal heads. The least sensitive site was the heel, with 1/6th the sensitivity of the most sensitive toes.

Neurogenic Positional Pedal Neuritis

2003 ◽  
Vol 93 (3) ◽  
pp. 174-184 ◽  
Author(s):  
Stuart M. Goldman
Keyword(s):  
Body Position ◽  
Diagnostic Category ◽  
Disease Process ◽  
Spinal Nerve ◽  
Lumbosacral Spine ◽  
Diabetic Patients ◽  
Sleeping Position ◽  
Definition Of ◽  
Protective Sensation ◽  
Loss Of Protective Sensation

Neurogenic positional pedal neuritis is a presentation of neuritic symptoms in one or both feet usually affected by body position, specifically, the position of the spine. Its etiology is similar to that of neurogenic-induced claudication caused by spinal stenosis in that the symptoms are caused by compression or irritation of nerves of the lower lumbosacral spine, usually the fifth lumbar and first sacral nerve roots. Burning, stabbing, a cold feeling, aching, numbness, paresthesia, or a weak or tired feeling of the feet (during some part of the disease process) depend on spinal position and may occur during standing, walking, or even lying in bed. Symptoms may be severe and are often eliminated by lumbosacral spine flexion, such as by walking with wheeled support such as a grocery cart or walker; less frequently by negative-heel shoe modification, which can change the position of the lumbosacral spine in stance; or by alteration of sleeping position. This condition, which can include loss of protective sensation, is often misdiagnosed as neuropathy (especially in diabetic patients) or less frequently as biomechanical in origin. In diabetic patients, this condition is frequently the cause of failure of monochromatic infrared energy therapy for diabetic peripheral neuropathy. Treatment is aimed at reducing the spinal nerve or nerve root irritation. Clear definition of the pedal symptoms of spinal nerve compression within a single diagnostic category should facilitate identification and treatment. (J Am Podiatr Med Assoc 93(3): 174-184, 2003)

scholarly journals Mortality and Conversion Rate to Below Knee or Above Knee Amputation Following Transmetatarsal Amputation

2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0011
Author(s):  
D. Anthony Barcel ◽  
Susan M. Odum ◽  
Taylor Rowe ◽  
Jefferson B. Sabatini ◽  
Samuel E. Ford ◽  
...  
Keyword(s):  
Risk Factors ◽  
Conversion Rate ◽  
Significant Risk ◽  
High Rate ◽  
Administrative Database ◽  
Categorical Variables ◽  
Diabetic Patients ◽  
Knee Amputation ◽  
History Of ◽  
Transmetatarsal Amputation

Category: Midfoot/Forefoot; Diabetes; Other Introduction/Purpose: Non-traumatic lower extremity amputations (LEA), especially those performed in dysvascular and diabetic patients, are known to have poor long-term prognosis. Perioperative mortality has been reported at between 4 and 10%, and the 1 and 5 year mortality rates range between 22-33% and 39-69%, respectively. While poor outcomes in these patients have been described, there is no consensus as to the predictors of mortality. The purpose of the study is to determine the percentage of patients who had a complication following transmetatarsal amputation (TMA) and identify associated risk factors for complications and mortality. Methods: We queried our institution’s administrative database to identify 247 TMA procedures performed in 229 patients between January, 2002 and December, 2016. Electronic health records were reviewed to document complications defined as reoperation, amputation and mortality. Mortality was also verified using the National Death Index. Additionally, we recorded risk factors including diabetes, A1c level, end stage renal disease (ESRD), cardiovascular disease (CVD), peripheral vascular disease (PVD), history of revascularization, contralateral amputation, and neuropathy. The majority of the study patients were males (157, 69%) and the average age was 57 years (range 24-91). The median BMI was 28 (range 16-58) and 29% of the study patients were obese with a BMI ≥ 30. Fishers Exact tests were used to compare categorical variables. Kruskal-Wallis and Independent T-tests were used to compare numeric data. All data were analyzed using SAS/STAT software version 9.4 (Carey, NC) and a 0.05 level of significance was defined apriori. Results: The conversion rate to below (BKA) or above knee amputation (AKA) was 26% (64 of 247). Males (p=.0274), diabetics (p=.0139), patients in ESRD (p=.019), and patients with a history of CVD (p=.0247) or perioperative revascularization (p=.022) were more likely to undergo further amputation following an index TMA. BMI was significantly higher in patients requiring BKA/AKA (p=.0305). There were no significant differences in age (p=.2723) or A1c levels (p=.4219). The overall mortality rate was 35% (84 of 229). Diabetes (p=.0272), ESRD (p=.0031), history of CVD (p<.0001) or PVD (p=.0179) were all significantly associated with mortality. Patients who died were significantly older (p=.0006) and had significantly higher A1c levels (p=.0373). BMI was not significantly associated with mortality. Twenty-two patients who had 23 further amputations subsequently died. Conclusion: In our series of patients undergoing TMA, 26% underwent further amputation and 35% of patients died. Conversion rate to BKA or AKA occurred at a high rate regardless of preoperative revascularization or the use of tendo-achilles or gastrocnemius lengthening procedures. Male sex, diabetes, ESRD, history of CVD or revascularization are significant risk factors for further amputation. ESRD, diabetes, history of CVD or PVD, older age and higher A1c levels are significant risk factors for mortality. These data provide useful insight into risk factors to be emphasized when counseling patients and their families to establish realistic postoperative expectations.

scholarly journals 651. Comparative Analysis Between Bacterial And Fungal Malignant Otitis Externa

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S383-S384
Author(s):  
Fatma Hammami ◽  
Makram Koubaa ◽  
Amal Chakroun ◽  
Fatma Smaoui ◽  
Khaoula Rekik ◽  
...  
Keyword(s):  
Otitis Externa ◽  
Clinical Presentation ◽  
The Elderly ◽  
Causative Organism ◽  
Diabetic Patients ◽  
Duration Of Treatment ◽  
Evolutionary Features ◽  
Significant Difference ◽  
Malignant Otitis Externa ◽  
History Of

Abstract Background Malignant otitis externa is a fatal infection of the external ear and temporal bone. Pseudomonas aeruginosa is the most common causative organism, while fungi are a rare cause of malignant otitis externa. We aimed to compare the clinical, therapeutic and evolutionary features between bacterial and fungal malignant otitis externa. Methods We conducted a retrospective study including all patients hospitalized for malignant otitis externa in the infectious diseases department between 2000 and 2018. Results Overall, we encountered 82 cases of malignant otitis externa, among which there were 54 cases (65.9%) of bacterial malignant otitis externa (BMO) and 28 cases (34.1%) of fungal malignant otitis externa (FMO). The males were predominant among BMO cases (57.4% vs 50%; p=0.5). Patients with FMO were significantly older (70±9 years vs 61±10 years; p&lt; 0.001) and had medical history of diabetes mellitus more frequently (96.4% vs 77.8%; p=0.03). The use of topical corticosteroids was significantly more reported among FMO cases (28.6% vs 5.6%; p=0.006). Otalgia (96.4% vs 81.5%), otorrhea (75% vs 66.7%) and cephalalgia (46.4% vs 42.6%) were the revealing symptoms among FMO and BMO, respectively, with no significant difference. Tenderness to palpation of the mastoid bone (64.3% vs 38.9%; p=0.02) and stenosis of the external auditory canal (92.9% vs 72.2%; p=0.02) were significantly more frequent among FMO cases. Complications were significantly more frequent among FMO cases (42.9% vs 9.3%; p&lt; 0.001). Treatment duration was significantly longer among FMO cases (70[40-90] days vs 45[34-75] days; p=0.03). Conclusion Our study showed that FMO affected more frequently the elderly and diabetic patients, when compared with BMO. Regardless of the causative agent, the clinical presentation was similar. However, the outcome was poor among FMO cases with the occurrence of complications, requiring a longer duration of treatment. Disclosures All Authors: No reported disclosures

Objectivization of vacuum-compression therapy effects on micro- and macrovascular perfusion in type 2 diabetic patients

2020 ◽  
Vol 65 (4) ◽  
pp. 469-476
Author(s):  
Jaroslav Prucha ◽  
Vladimir Socha ◽  
Lenka Hanakova ◽  
Andrej Lalis ◽  
Karel Hana
Keyword(s):  
Lower Limb ◽  
Compression Therapy ◽  
Neurological Complications ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Therapeutic Procedures ◽  
History Of ◽  
Injury Recovery ◽  
Type 2 Diabetic

AbstractThe present study aimed to evaluate the characteristic influence of physical therapeutic procedures of vacuum-compression therapy (VCT) on microvascular perfusion (MiP) and macrovascular perfusion (MaP) of the lower limb in diabetic patients. A sample of nine patients with a medical history of type 2 diabetes was used for the purpose of this study. Most of the subjects’ medical conditions included venous and neurological complications of the lower limb, whereas the rest of the subjects entered the treatment due to injury recovery or their phlebological disease. The PeriFlux System 5000 (Perimed, Sweden) diagnostic device was used to measure MiP. The MaP was evaluated based on the perfusion index (PI) using the Extremiter monitoring device (Embitron, Czech Republic) designed to perform VCT procedures. The study found that MiP and MaP increase as an effect of VCT procedures and at the same time PI clearly reflects the effect of the applied vacuum and compression phases, verifying the method’s vital influence on peripheral perfusion disorders.

Sign in / Sign up

Export Citation Format

Share Document