Can the Pirani Score Predict the Number of Casts and the Need for Tenotomy in the Management of Clubfoot by the Ponseti Method?

Non-zero Pirani score in corrected clubfoot due to empty heel: A prognostic dilemma

Purpose

The aim of this study was to track the correction of individual components of Pirani scoring system (PSS) over the manipulation and tenotomy phase of Ponseti casting method in idiopathic clubfoot. Additionally, non-zero PSS scores were analysed to find out the residual deformities.

Methods

The included feet were assessed initially according to the six component PSS. The individual scores of each component of midfoot and hindfoot were scored at each visit till the final follow up. The final scoring was done before the start of the bracing phase of the feet (with or without tenotomy).

Results

Evaluation was performed for 42 feet in 28 infants (14 bilateral) with mean age of 42.5 ± 39.2 days (range, 15-150 days). All the six components of PSS showed a significant change from the first cast till the pre tenotomy cast. Post tenotomy, there was a significant change in the scores of posterior crease (0.4 ± 0.2 to 0.1 ± 0.1, p < 0.001) and rigid equinus (0.8 ± 0.3 to 0.1 ± 0.2, p < 0.001). 66.7 % (28/42) of the feet had an abnormal empty heel sign of either 0.5 [22/42 (52.3 %)] or 1 [6/42 (14.4 %)] at initiation of bracing.

Conclusions

The individual components of Pirani scoring system changed to a variable extent as the treatment progressed. Curvature lateral border and talar head reached normalcy prior to tenotomy. Posterior crease and rigid equinus showed a significant reduction after tenotomy. The non-zero empty heel component may require careful interpretation both post treatment and during follow ups.

Factors Predictive of Tenotomy After Ponseti Casting for Idiopathic Clubfoot: A Tertiary Care Center Study

INTRODUCTION

Parents of children with clubfoot are likely to inquire about the need for tenotomy and about any factors that may be predictive. The present study was done to identify factors that may help predict the need for tenotomy in children undergoing Ponseti treatment for idiopathic clubfoot.

METHODS

A prospective observational study was conducted on patients under 5 years of age with idiopathic clubfoot and no previous treatment history treated at Hospital and Rehabilitation Centre for Disabled Children. The relationship between the Pirani score, Dimeglio score, age, and passive ankle dorsiflexion (DF) and the need for heel cord tenotomy was analyzed using appropriate statistical methods.

RESULTS

Of 83 patients (125 feet) with a mean age of 6 months, 93 feet (74.4%) required a percutaneous tenotomy. The mean initial Pirani and Dimeglio score for 125 club feet was 4.5 (SD=1.68) and 13.5 (SD=6.1), respectively. The mean initial passive ankle DF was -40.4 (SD=22.31). The Dimeglio ( P =0.000), Pirani scores ( P =0 .000), and passive ankle DF ( P =0.000) showed significant association with the need for tenotomy.

CONCLUSIONS

This study shows a strong association between initial Pirani and Demiglio scores and initial passive ankle DF as predictive of a heel cord tenotomy. However, age, sex, and laterality were not associated with the need for tenotomy.

Dimeglio's derotation of calcaneo pedal block and Pirani's talar head reduction: a quantitative matching

We aimed to determine the quantitative value of derotation of calcaneo pedal block (DCPB) of Dimeglio system equivalent to talar head reduction of Pirani system. We also compared the ankle dorsiflexion obtained post tenotomy for different measures of DCPB. The study involved 53 idiopathic clubfoot children (86 feet) treated with Ponseti technique. Percutaneous Achilles tenotomy to correct ankle equinus was performed when forefoot adduction, heel varus were corrected and ankle dorsiflexion was <10°. Pirani's coverage of lateral head of talus was taken as a determinant of adequate DCPB and to perform tenotomy. Mean patient age at enrollment was 60.9 ± 71.1 days. The median pre and posttreatment Dimeglio scores were 13 (range 4-20) and 0 (range 0-3), respectively. DCPB at the time of talar head reduction was 53.8 ± 9.8°. In 85% feet, talar head reduction was obtained by DCPB 60° and all were reduced by 70°. The average ankle dorsiflexion improved significantly with DCPB ≥ 50°. The measure at which DCPB matched with talar head reduction of Pirani system was variable (40-70°). In all feet, talar head was reduced by 70° DCPB. Post tenotomy, ankle dorsiflexion was better with DCPB ≥ 50°.

Is the Denis Browne Splint a Myth? A Long-Term Prospective Cohort Study in Clubfoot Management using Denis Browne Splint Versus Daily Exercise Protocol

The Ponseti technique is successful in idiopathic clubfoot management. However, the leading cause of relapse and recurrence is nonadherence to the Denis Brown bracing protocol. This necessitates more extensive soft tissue surgeries. Based on a detailed up-to-date search, we have found that no other studies provide such a modified Ponseti technique. This study is unique, as it depends on using specific stretching exercises instead of bracing during management. Between August 2009 and June 2019, a consecutive series of 194 isolated idiopathic clubfoot patients (251 feet) were included in this study. The mean follow-up was 93 months (range 72 to 146), mean 91.8 months. All patients underwent a clinical and functional assessment using the Laaveg-Ponseti score and radiological assessments. There were 132 boys (68.1%) and 62 girls (31.9%), a male-to-female ratio of 2:1. The mean age at initiation of treatment was 14.9 days. According to the Laaveg-Ponseti score, 51.7% yielded excellent results, 35.3% yielded good results, 11.55% yielded fair results, and 1.59% yielded poor results. Bracing noncompliance has been identified as a major cause for treatment failure. This presented exercise protocol not only eliminates the need for bracing and reduces the cost for the affected individuals but also provides excellent clinical and radiographic end results, comparable to the original treatment protocol using the Denis Brown brace.