Search Results
Background
Heel pain is a prevalent concern in orthopedic clinics, and there are numerous pathologic abnormalities that can cause heel pain. Plantar fasciitis is the most common cause of heel pain, and the plantar fascia thickens in this process. It has been found that thickening to greater than 4 mm in ultrasonographic measurements can be accepted as meaningful in diagnoses. Herein, we aimed to measure normal plantar fascia thickness in adults using ultrasonography.
Methods
We used ultrasonography to measure the plantar fascia thickness of 156 healthy adults in both feet between April 1, 2011, and June 30, 2011. These adults had no previous heel pain. The 156 participants comprised 88 women (56.4%) and 68 men (43.6%) (mean age, 37.9 years; range, 18–65 years). The weight, height, and body mass index of the participants were recorded, and statistical analyses were conducted.
Results
The mean ± SD (range) plantar fascia thickness measurements for subgroups of the sample were as follows: 3.284 ± 0.56 mm (2.4–5.1 mm) for male right feet, 3.3 ± 0.55 mm (2.5–5.0 mm) for male left feet, 2.842 ± 0.42 mm (1.8–4.1 mm) for female right feet, and 2.8 ± 0.44 mm (1.8–4.3 mm) for female left feet. The overall mean ± SD (range) thickness for the right foot was 3.035 ± 0.53 mm (1.8–5.1 mm) and for the left foot was 3.053 ± 0.54 mm (1.8–5.0 mm). There was a statistically significant and positive correlation between plantar fascia thickness and participant age, weight, height, and body mass index.
Conclusions
The plantar fascia thickness of adults without heel pain was measured to be less than 4 mm in most participants (~92%). There was no statistically significant difference between the thickness of the right and left foot plantar fascia.
Ultrasonographic Evaluation of Plantar Fascia Bands
A Retrospective Study of 211 Symptomatic Feet
The authors measured the thickness of the medial, central, and lateral bands of the plantar fascia using ultrasonographic techniques in 109 symptomatic patients with 211 painful heels. Plantar fasciitis was diagnosed by the presence of plantar heel pain and tenderness of the plantar fascia on palpation and was correlated with plantar fascia thickness. All of the symptomatic feet had medial band tenderness, with an average thickness of 5.9 mm, 68% had central band tenderness, with an average thickness of 5.3 mm, and 26% had lateral band tenderness, with an average thickness of 4.4 mm. The average thickness of all symptomatic bands was 5.35 mm, which was significantly greater than that for all asymptomatic bands, which was 2.70 mm. There were also significant differences in the thickness of the three plantar fascia bands in symptomatic patients. A plantar fascia index was established consisting of the ratio of the mean thickness of symptomatic medial, central, and lateral plantar fascia bands to that of asymptomatic bands; for this study, the index value is 1.98 (5.35/2.70 mm). (J Am Podiatr Med Assoc 92(8): 444-449, 2002)
Many procedures have been described for the resection of plantar calcaneal spurs as treatment of heel spur syndrome and chronic plantar fasciitis. Most of these techniques involve a medial incision of between 2 and 6 cm for adequate exposure of the calcaneal spur. This article describes a new technique for resecting a calcaneal spur with a smaller medial incision using the holmium:yttrium-aluminum-garnet (Ho:YAG) laser. This laser permits adequate resection of a plantar calcaneal spur as well as coagulation of the bone and surrounding tissues. This minimally invasive procedure has been used with good results over the past year by the senior author (W.K.S.) for the resection of calcaneal spurs. (J Am Podiatr Med Assoc 91(3): 142-146, 2001)
Biomechanical Consequences of Total Plantar Fasciotomy
A Review of the Literature
Background: Plantar fascia release for chronic plantar fasciitis has provided excellent pain relief and rapid return to activities with few reported complications. Cadaveric studies have led to the identification of some potential postoperative problems, most commonly weakness of the medial longitudinal arch and pain in the lateral midfoot.
Methods: An electronic search was conducted of the MEDLINE, ScienceDirect, SportDiscus, EMBASE, CINAHL, Cochrane, and AMED databases. The keywords used to search these databases were plantar fasciotomy and medial longitudinal arch. Articles published between 1976 and 2008 were identified.
Results: Collectively, results of cadaveric studies suggested that plantar fasciotomy leads to loss of integrity of the medial longitudinal arch and that total plantar fasciotomy is more detrimental to foot structure than is partial fasciotomy. In vivo studies, although limited in number, concluded that although clinical outcomes were satisfactory, medial longitudinal arch height decreased and the center of pressure of the weightbearing foot was excessively medially deviated postoperatively.
Conclusions: Plantar fasciotomy, in particular total plantar fasciotomy, may lead to loss of stability of the medial longitudinal arch and abnormalities in gait, in particular an excessively pronated foot. Further in vivo studies on the long-term biomechanical effects of plantar fasciotomy are required. (J Am Podiatr Med Assoc 99(5): 422–430, 2009)
Background: Because ultrasound measurement of plantar fascia thickness is widely used in the diagnosis and evaluation of plantar fasciitis, it is important to understand and minimize the errors that occur with this measurement. The aim of this systematic review was to identify and synthesize studies reporting on intrarater and interrater reliability of ultrasound measurement of plantar fascia thickness.
Methods: After comprehensive searches in the MEDLINE, Embase, and Cochrane Library databases, 11 studies involving 238 healthy participants and 68 patients with pathologic foot disorders were included.
Results: Seven of 11 studies revealed a low risk of bias. Most of the studies reported good to excellent intrarater and interrater reliability for ultrasound measurement of plantar fascia thickness (intrarater intraclass correlation coefficient [ICC], 0.77–0.98; interrater ICC, 0.76–0.98). In addition, two studies on intrarater reliability and one study on interrater reliability showed moderate reliability (ICCs, 0.65, 0.67, and 0.59, respectively). Overall, the standard error of measurement was less than 5% and did not exceed 7%.
Conclusions: The findings of this review suggest that ultrasound measurement of plantar fascia thickness is reliable in terms of both relative and absolute reliability. Reliability can be optimized by using the average of multiple measurements and an experienced operator.
Plantar heel pain is often managed through podiatric and physical therapy interventions. Numerous differential diagnoses may be implicated in patients presenting with plantar heel pain; however, symptoms are often attributed to plantar fasciitis. Abductor hallucis, flexor digitorum brevis, and quadratus plantae share proximal anatomic attachment sites and mechanical function with the plantar fascia. Although these plantar intrinsic muscles each perform isolated digital actions based on fiber orientation and attachment sites, they function collectively to resist depression of the lateral and medial longitudinal arches of the foot. Overuse injury is the primary contributing factor in tendinopathy. The close anatomic proximity and mechanical function of these muscles relative to the plantar fascia suggests potential for proximal plantar intrinsic tendinopathy as a result of repetitive loading during gait and other weightbearing activities. To date, this diagnosis has not been proposed in the scientific literature. Future studies should seek to confirm or refute the existence of proximal plantar intrinsic tendinopathic changes in patients with acute and chronic plantar heel pain through diagnostic imaging studies, analysis of lactate concentration in pathologic versus nonpathologic tendons, and response to specific podiatric and physical therapy interventions germane to tendinopathy of these muscles.
Metatarsalgia is characterized by pain in the forefoot, which is associated with increased stress over the metatarsal head region. Despite the availability of a variety of conservative or surgical treatments for this condition, a few cases have demonstrated relapse or poor response to treatment. Pulsed radiofrequency (PRF) can provide pain relief in patients with diverse chronic conditions without causing neural injury. Recently, studies have shown that ultrasound-guided PRF may be beneficial for adhesive capsulitis, carpal tunnel syndrome, tarsal tunnel syndrome, and recalcitrant plantar fasciitis. Here, we describe a successful case of significant pain relief achieved by using ultrasound-guided PRF targeting the posterior tibial nerve (PTN) at the ankle of a 67-year-old woman with recalcitrant metatarsalgia. Ten minutes after ultrasound-guided PRF was applied at the PTN, the patient reported decreased pain (from 8 to 3 on a visual analogue scale) and did not exhibit any particular side effects. Three months after PRF application, the patient's visual analogue scale score remained more than 50% below the baseline, and she did not need additional conservative treatment during the follow-up period. To the best of our knowledge, we present the first case report using ultrasound-guided PRF at the PTN for treatment of recalcitrant metatarsalgia. We hypothesize that ultrasound-guided PRF at the PTN may be a potentially novel approach for treating recalcitrant metatarsalgia.
The authors review various pedal conditions affecting the rearfoot, including plantar fasciitis, Achilles tendon pathology, fractures, arthritides, coalitions, and tumors. Various diagnostic imaging modalities such as routine radiography, radionuclide bone scanning, computed tomography, and magnetic resonance imaging are discussed.
In Vivo Forces in the Plantar Fascia During the Stance Phase of Gait
Sequential Release of the Plantar Fascia
Plantar fasciotomies have become commonplace in podiatric and orthopedic medicine for the treatment of plantar fasciitis. However, several complications have been associated with plantar fascial release. It has been speculated that the cause of these complications is excessive release of the plantar fascia. The aim of this project was to determine whether the amount of fascia released, from medial to lateral, causes a significant increase in force in the remaining fascia. A dynamic loading system was developed that allowed a cadaveric specimen to replicate the stance phase of gait. The system was capable of applying appropriate muscle forces to the extrinsic tendons on the foot and replicating the in vivo timing of the muscle activity while applying force to the tibia and fibula from heel strike to toe-off. As the plantar fascia was sequentially released from medial to lateral, from intact to 33% released to 66% released, the real-time force and the duration of force in the remaining fascia increased significantly, and the force was shifted later in propulsion. In addition, the subtalar joint was unable to resupinate as the amount of fascia release increased, indicating a direct relationship between the medial band of the plantar fascia and resupination of the subtalar joint during late midstance and propulsion. (J Am Podiatr Med Assoc 93(6): 429-442, 2003)
Foot Overuse Diseases in Rock Climbing
An Epidemiologic Study
Background:
Literature examining the incidence of foot diseases in rock climbing is limited to traumatic injuries. We examined a large sample of climbers, assessed the chronic diseases of the foot, and correlated them with foot morphology, shoe type, and type of climbing practiced.
Methods:
Between May 1 and September 30, 2009, 144 climbers (mean age, 31.7 years) were examined to analyze the effect of rock climbing on the various foot diseases found at the time of the evaluation.
Results:
Eighty-six percent of the climbers were affected by a pathologic condition. Nail disease was found in 65.3% of patients, followed by recurrent ankle sprains (27.8%), retrocalcaneal bursitis (19.4%), Achilles tendinitis (12.5%), metatarsalgia (12.5%), and plantar fasciitis (5.6%). Male sex, the use of high-type shoes, the high degree of climbing difficulty, and the competitive level were often related to the onset of foot diseases. Climbing shoes are usually smaller than common footwear. This “shoe-size reduction” averaged 2.3 sizes, forcing the foot into a supinated and cavus posture that favors lateral instability. The posterior edge of the shoe aperture produces increased pressure on the heel, with retrocalcaneal bursitis.
Conclusions:
Overuse foot diseases related to rock climbing are particularly frequent and debilitating. Detailed knowledge of these diseases and their predisposing factors may help us implement effective preventive or therapeutic measures, including changes in the type of climbing, correction of body weight, degree of difficulty, footwear, orthoses, and measures that maximize the support of the foot to the ground. (J Am Podiatr Med Assoc 103(2): 113–120, 2013)
