Analyzing the Interaction between Clinical, Neurophysiological and Psychological Outcomes Underlying Chronic Plantar Heel Pain: A Network Analysis Study

Effects of insoles adapted in flip-flop sandals in patients with persistent plantar heel pain: A sham-controlled randomised trial

OBJECTIVE

To evaluate the use of custom-made insoles adapted to flip-flops on pain intensity, foot function, and functional walking ability in individuals with persistent plantar heel pain in the short and medium term.

DESIGN

Randomised controlled trial.

SETTING

Flip-flop sandals in patients with persistent plantar heel pain.

MAIN MEASURES

Participants (n = 80) were assessed at baseline, six and 12 weeks after the intervention, and 4 weeks post-intervention.

RESULTS

For the primary outcomes, after 6 weeks of intervention, no between-group difference was observed in the intensity of morning pain or pain with walking, mean difference = -0.4 (95% confidence intervals = -1.5 to 0.8). Similarly, after 12 weeks of intervention, no between-group difference was observed in the intensity of morning pain or pain with walking, mean difference = -0.7 (95% confidence intervals = -1.9 to 0.6). Finally, at 4 weeks after the end of the intervention, there was no between-group difference in morning pain or pain on walking, mean difference = 0.01 (95% confidence intervals = -1.4 to 1.4). All differences and confidence intervals were smaller than the minimum clinically important difference for pain (2 points). There were no differences between the groups for the secondary outcomes. In addition, the mean differences were smaller than the minimum clinically important differences for pain intensity, foot function and functional walking ability.

CONCLUSION

Custom-made insoles fitted to flip-flops did not differ from flip-flops with sham insoles in improving pain intensity, foot function and functional walking ability in people with persistent heel pain.Trial registration: ClinicalTrials.gov (Identifier: NCT04784598). Data of registration: 2023-01-20.

Long-term bilateral change in pain and sensitivity to high-frequency cutaneous electrical stimulation in healthy subjects depends on stimulus modality: a dermatomal examination

Introduction

Contradictory changes in pain and sensitivity at long-term following cutaneous 100 Hz high frequency stimulation (HFS) have been previously observed. Thus, we aimed to document long-lasting changes in multimodal sensitivity following HFS, and factors influencing them.

Methods

Long-lasting changes were assessed with mechanical [brush, von Frey filament (588.2 mN)] and thermal [heat (40°C)/cold (25°C)] bedside sensory testing, and electrical TS (0.2 ms single electrical stimuli), at the homotopic (ipsilateral C6 dermatome), adjacent heterotopic (ipsilateral C5 and C7 dermatomes) and contralateral (contralateral C6 dermatomes) dermatomal sites in a single testing session. TS were applied before and after application of 100 Hz HFS at the ipsilateral C6 dermatome. Subjects rated their sensation and pain intensity to TS, and completed questionnaires related to pain descriptors and quality of life.

Results

Long-lasting changes in mechanical and cold sensitivity was detected up to 45 min after HFS at homotopic C6 dermatome, and a temporary increase in cold sensitivity at 20 min in the contralateral C6 dermatome (p < 0.05). A slow development of bilateral depotentiation to electrical pain TS was also detected from 40 min after HFS (p < 0.05). Higher HFS-induced mechanical and cold sensitivity was identified in women (p < 0.05). Age and quality of life were associated with pain intensity (p < 0.05).

Conclusion

Long-term unilateral and bilateral changes in sensation and pain following electrical HFS have been found. These findings may suggest a new insight into the development of persistent pain mechanisms. Further studies are now needed.

"Antero-medial load shift" in unilateral plantar heel pain - A cross-sectional exploratory study

BACKGROUND AND PURPOSE

Plantar foot pressure provides an insightful data in the ankle and foot complex which may aid in the detection of underlying pathology. Since individuals with unilateral plantar heel pain (PHP) tend to develop compensatory loading strategies, this study aimed to observe the foot loading pattern compared to the asymptomatic side and its relationship with the morphological variations in individuals with unilateral PHP.

METHODS

It was a prospective cross-sectional study done on 17 participants with unilateral PHP. The calcaneal inclination and calcaneal first metatarsal angles were measured using lateral weight-bearing radiographs for both symptomatic and asymptomatic feet. Static and dynamic plantar foot pressures for both sides were obtained using a "Portable baropodometry platform 0, 5 m Entry Level footscan®.

RESULTS

On the symptomatic side, the pressure in the lateral heel was reduced by 65% in static and 67% in dynamic measurements, while in the medial heel, it was reduced by 16 % in static and 47 % in dynamic measurements compared to that of the asymptomatic side. There was a transfer of pressure from the hind foot to the forefoot by 44 % in static and 46 % in dynamic measurements resulting in anterior load shift. It was also observed that the prevalence of PHP was higher in the normal arched foot (59%).

CONCLUSION

Based on the observations, compared to the asymptomatic side, patients with unilateral plantar heel pain exhibited an anteromedial load shift (AMLS) in their plantar pressures. PHP was reported higher in the foot with normal morphology.

LEVEL OF EVIDENCE

Level 4.

Impact of Plantar Fasciitis on Foot-Specific and Generic Health-Related Quality of Life in King Khalid University Hospital, Saudi Arabia

Objectives The objective is to assess the extent of foot-specific and generic health-related quality of life (HRQoL) impairment among individuals diagnosed with plantar fasciitis (PF) at King Khalid University, Saudi Arabia, and to determine the influence of various sociodemographic and clinical factors. Methods In this cross-sectional study, we administered an online survey from March to June 2023 to patients with PF at King Khalid University Hospital. This questionnaire covered sociodemographic, and clinical characteristics, and included the translated Foot Health Status Questionnaire (FHSQ). Further, patient data were obtained from hospital records between 2016 and 2023 using the E-SIHI system. Results We recruited 209 patients for the study. Lower FHSQ scores were found in unemployed and low-income participants indicating a worse quality of life (QoL) in the Foot Pain domain, while those aged over 40 years and with low income showed greater impairment in the General Foot Health domain. No single factor influenced the Foot Function or Footwear domains. Worse General Health and Physical Activity scores were associated with low-education and low-income participants and those who did not exercise. Women exhibited a lower QoL than men in all domains except for General Health. Conclusion The QoL of Saudi women with PF was similar to that of women in other countries. However, the patients in the present study reported poorer footwear scores but better General Health scores. Therefore, focusing more on proper footwear-related treatments may help improve the QoL of patients with PF.