Does initial Pirani score and age influence number of Ponseti casts in children?

Reproducibility of pop sensation, Thompson sign in achillotomy, and final Pirani score to predict clubfoot relapse: Achillotomy clinical signs and Pirani predictive ability

Ultrasound (US) can guide and confirm percutaneous release of the achilles tendon in the clubfoot. However, this technique may not always be available; therefore, surgeons' reported feelings of tendon release ("click" or "pop") and the Thompson sign could demonstrate that they are sensitive and reliable for confirming complete tendon release. The purpose of this study was to compare the reproducibility of clinical maneuvers that aim to detect the reported "click" or "pop" sensation by the surgeon and the Thompson sign after surgical release in percutaneous achilles tenotomy compare with US in patients with clubfoot. A cross-sectional reproducibility study of consecutive patients with idiopathic clubfoot was conducted. All the patients were scheduled to undergo tenotomy in the operating room using the standard percutaneous achilles tenotomy technique under sedation. The surgeon's reported surgical sensation ("click" or "pop") and Thompson signs were compared to the US assessment of the cut. The final Pirani score was used to predict recurrence risk and was correlated with the number of plaster casts and age. Forty-five feet were affected in 30 patients. Eighteen (60%) men. Age range: 1 to 60 months. The sensation of "click" or "pop" was recorded in 38 patients, and complete release was confirmed by US in 37 patients, for a sensitivity (Se) of 0.95 and specificity (Sp) of 0.63. Thompson signs were positive in 33 and 36 patients at 2 evaluations, with Se values of 0.87 and 0.92 and Sp values of 0.88 and 0.75, respectively. The Pirani final score, a predictor of recurrence risk, had an area under the curve of 0.80 (95% CI = 0.63-0.97; P = .005), Se = 0.78, and Sp = 0.56, with a cutoff point of 2.75. The feeling of achilles tendon release and Thompson sign had high sensitivity, prevalence, accuracy, and posttest probability. The confirmation of tendon release based on clinical signs could prevent the use of US.

Clinically Detected Leg Length Discrepancy in Patients With Idiopathic Clubfoot Deformity: Prevalence and Outcomes

BACKGROUND

This study evaluates the prevalence and outcomes of patients with idiopathic clubfoot and clinically detected limb length discrepancy (LLD).

METHODS

This is a retrospective cohort study of idiopathic clubfoot patients in a Research Ethics Board-approved clubfoot registry. Patients with LLD ≥0.5 cm (LLD+) were compared with those with no or <0.5 cm LLD (LLD-). LLD was determined by documented clinical examination. Exclusion criteria included nonidiopathic clubfoot deformity, <2-year follow-up, and incomplete records.

RESULTS

Of the 300 patients included, 27 (9.0%) had an LLD, of whom 23 patients had a unilateral clubfoot deformity. The prevalence of LLD was 15.3% and 2.67% in unilateral and bilateral clubfoot patients, respectively. The mean LLD was 1.21 cm (0.5 to 3.5 cm, SD: 0.78 cm) in LLD+ patients, with a mean of 1.27 cm (SD: 0.79 cm) in unilateral clubfoot patients and 0.88 cm (SD: 0.75 cm) in bilateral patients. The total number of casts applied in LLD+ unilateral clubfoot patients was significantly higher than in LLD- unilateral patients (9.5 vs. 6.8 casts; P =0.015). The overall relapse rate in all patients was 30.3% and was significantly higher in the unilateral only LLD+ group [relative risk (RR)=2.89] and the total LLD+ patient cohort (RR=1.68). The risk of repeat casting for relapse was also higher in the unilateral LLD+ group (RR=2.45) and the total LLD+ group (RR=1.87). The risk of surgery for relapse was significantly higher in the unilateral LLD+ group for any surgery ( P =0.046), and most specifically for open tendo-Achilles tenotomy ( P =0.008) and tibialis anterior tendon transfer ( P =0.019). There was no correlation between the severity of LLD and Pirani score at presentation.

CONCLUSIONS

LLD was present in 9% of idiopathic clubfoot patients, and most were <2 cm. There is a significantly higher risk of relapse in patients with unilateral clubfoot and LLD. The risk of surgery overall was higher in all patients with a unilateral LLD. Assessment of LLD should be routinely performed in clubfoot patients.

LEVEL OF EVIDENCE

Level III.

Semirigid Fiberglass Casting for the Early Management of Clubfoot: A Single-Center Experience

Background

Semirigid fiberglass (SRF) is an alternative material to plaster of Paris (POP) for idiopathic clubfoot casting in the Ponseti method. The purpose of this study was to evaluate early clinical outcomes in a series of idiopathic clubfoot patients treated with SRF at a single institution and to compare these findings to historical norms with POP casting present in the literature.

Methods

A series of idiopathic clubfoot patients managed exclusively with SRF in the Ponseti method was identified. Treatment efficacy was evaluated by number of casts, change in Pirani score, frequency of treatment-related complications, and frequency of surgery other than tenotomy. A comprehensive literature review was used for comparative historical norms.

Results

The study included 34 feet in 26 patients. Pirani score was 4.7±1.3 at presentation and 1.9±1.4 at the end of casting, representing a score change of 2.8±1.3 with SRF. Initial correction was obtained with 6.9±1.4 casts. Treatment-related complications occurred in six treated feet (17.6%) including 13 cast slippages in five feet and one cast-related thigh abrasion. A total of 25 (73.5%) feet underwent tenotomy. Two feet required an additional surgical procedure.

Conclusion

Clubfoot patients treated with SRF demonstrated acceptable deformity correction following Ponseti-style casting. The quantitative clinical outcomes evaluated appeared similar to norms using POP present in the literature. The findings of this study support SRF as a viable alternative to plaster casting for clubfoot correction utilizing the Ponseti method. As such, further investigation for rigorous comparative assessment is warranted.

Factors associated with the relapse in Ponseti treated congenital clubfoot

Objectives

We retrospectively investigated the clinical materials to seek the factors that lead to relapse after using the Ponseti method.

Methods

We retrospectively reviewed all children with congenital clubfoot treated with the Ponseti method in our hospital from June 2008 to June 2013. The data included the following factors: age, gender, initial Pinari score, number of casts, number of feet (unilateral or bilateral), age at the first casting, age of mother, tenotomy, walking age, and compliance with using bracing. All investigations were conducted in conformity with ethical standards. This study was approved by Guilin Peoples’ Hospital Ethics Committee.

Results

In this study, there were 148 cases (164 ft) in total that underwent the Ponseti method, with the follow–up period at least 5 years. Of them, 64 children presented with left side, 58 with right side, and 26 with bilateral cases. This study included 75 males and 73 females; sex did not affect the outcomes. The mean age of the first casting was 2.50 ± 2.15 months. The average initial Pirani score was 4.98 ± 1.33, and the average number of casts was 5.71 ± 2.28 times. The mean age of mothers at birth was 25.81 ± 2.38 years old. The walking age of children was at a mean of 14.83 ± 1.18 months. Forty-nine cases could not tolerate using braces, namely the rate of noncompliance in this study was 33.1%. Tenotomy was performed on 113 ft (76.4%). The average follow–up period was 7.27 ± 1.29 years (from 5 to 10 years). The rate of relapse was 21.6% (32 cases) at the end of the follow-up. The rate of relapse in the noncompliance with using bracing group was significantly higher compared to the compliance group .

Conclusion

The initial Pirani score, compliance with the foot abduction brace and the age at the first casting are three independent factors for relapse in clubfoot.

Prognostic factors for recurrent idiopathic clubfoot deformity: a systematic literature review and meta-analysis

Background and purpose - After initial clubfoot correction through Ponseti treatment, recurrence rates range from 26% to 48%. Even though various factors have been associated with increased recurrence risk, systematic assessments of the prognostic capacity of recurrence risk factors and their clinical relevance are lacking. Therefore we assessed clinically relevant prognostic factors for recurrent idiopathic clubfoot deformity after initial correction through Ponseti treatment. Methods - PubMed, Embase, Cinahl, and Web of Science were systematically searched for studies investigating the association between clinically relevant factors and recurrence rates. Prognostic factors were qualitatively assessed and included in the meta-analysis if ≥ 2 studies investigated the same factor and methods were comparable. Results - 34 articles were included in the qualitative synthesis, of which 22 were also included in the meta-analysis. Meta-analysis revealed that poor evertor muscle activity (OR = 255, 95% CI 30-2,190), brace non-compliance (OR = 10, CI 5-21), no additional stretching (OR = 31, CI 10-101), more casts (OR = 3.5, CI 1.6-7.8), lower education level of parents (OR = 1.8, CI 1.2-2.6), non-marital status of parents (OR = 1.8, CI 1.1-3.0), and higher Dimeglio scores (OR = 1.9, CI 1.2-3.3) were associated with higher recurrence rates. Interpretation - Brace non-compliance and poor evertor muscle activity have been identified as main recurrence risk factors and are therefore important to be closely monitored during clinical follow-up of clubfoot patients. Adding additional stretching during the bracing protocol might be promising in the quest to prevent relapse, but scientific evidence for clear clinical treatment recommendations is still limited.

Predictive ability of scoring systems towards casting in treatment of idiopathic clubfoot by the Ponseti method in infants

A prospective study to find a correlation between the severity of clubfoot and the number of casts required for the correction was conducted. The relationship of early relapse with the severity of the deformity was also studied. A total of 42 infants (61 feet) with primary and idiopathic clubfeet were included in the study. Previously treated and clubfeet due to secondary causes were excluded. All clubfeet were treated by the Ponseti method, and the Pirani score, Dimeglio score and Foot Bimalleolar (FBM) angle were taken at presentation and before every casting and at 6 months of follow-up. The average age of the child at presentation was 24 days, the average initial Pirani score was 4.172, the average initial Dimeglio score was 14.36 and the average FBM angle was 63.87 degrees. The average number of corrective casts given was 5.08 (range 2-8). The regression analysis showed a low correlation between Pirani and Dimeglio scores with the number of casts. There was no correlation between FBM angle and casting. Eleven of the 61 feet had a relapse (18%). Ten of 11 relapsed feet had a midfoot Pirani score of equal to or more than 2. The regression analysis shows a low correlation between Pirani and Dimeglio scores with the number of casts. There was no correlation between FBM angle and casting. Midfoot score equal to or more than 2 is a significant risk factor for relapse.

Management issues of congenital talipes equinovarus in the neonatal intensive care unit: A systematic review

BACKGROUND

The Ponseti method is the standard of care for managing idiopathic congenital talipes equinovarus (clubfoot) in the outpatient setting, but there are no clinical guidelines for inpatient treatment. Children in the neonatal intensive care unit (NICU) with clubfoot often delay treatment initiation due to medical reasons.

METHODS

We systematically reviewed literature related to the treatment of clubfoot in the NICU, non-idiopathic clubfoot, and older infants, as well as barriers to care.

RESULTS

In a mixed NICU population of syndromic and idiopathic clubfoot, the Ponseti method has good functional outcomes with minimal interference with medical management. The Ponseti method has good functional outcomes with reduced need for extensive surgical procedures in non-idiopathic clubfoot and idiopathic clubfoot with delayed presentation (under one year of age).

CONCLUSIONS

It is possible to begin Ponseti treatment in the NICU without compromising medical management. It is not clear if this confers an advantage over waiting for outpatient casting.

Can clubfoot scoring systems predict the number of casts and future recurrences in patients undergoing Ponseti method?

Background

Congenital clubfoot is one of the common congenital orthopaedic deformities. Pirani and Dimeglio scoring systems are two classification systems for measuring the severity of the clubfoot. However, the relation between the initial amount of each of these scores and the treatment parameters is controversial.

Methods

Patients with severe and very severe idiopathic clubfoot undergoing Ponseti treatment were entered. Their initial Pirani and Dimeglio scores, the number of castings as a short-term treatment parameter, and the recurrences as a long-term parameter until the age of three were prospectively documented.

Results

One hundred patients (143 feet) with mean age of 9.51 ± 2.3 days including 68 males and 32 females and the mean initial Pirani score of 5.5 ± 0.5 and the mean initial Dimeglio score of 17.1 ± 1.6 were studied. The incidence of relapse was 8.4 %( n = 12). The mean initial Pirani score (P < 0.001) and the mean initial Dimeglio score (P < 0.003) of the feet with recurrence were significantly more than the non-recurrence feet. The mean number of casts in the recurrence group (7 ± 0.9) was significantly more than the feet without recurrences (6.01 ± 1.04) (P = 0.002). The ROC curve suggested the Pirani score of 5.75 and the Dimeglio score of 17.5 as the cut-off points of these scores for recurrence prediction.

Conclusion

In our study, Pirani and Dimeglio scores are markedly related with more number of casts and recurrence in patients with severe and very severe clubfoot. Also, we have introduced new cut-off points for both classification systems for prediction of recurrence. To the best of our knowledge, this finding has not been introduced into the English literature.

Correlation of age and severity scores to the number of Ponseti casts in Indian infants with clubfeet

PURPOSE

World over, age and various severity scores are among the foremost variables studied in relation to the number of casts in clubfoot. We studied the correlation between child's age at presentation, initial Pirani, Dimeglio scores to the number of Ponseti casts in Indian clubfoot children. Further, we matched Pirani versus Dimeglio scores at different severities of deformity to derive a correlation between them.

METHODS

We included 90 idiopathic clubfeet in 55 infants and scored them according to Pirani and Dimeglio grading systems. Syndromic, neurological, surgically intervened, atypical or complex clubfeet were excluded from the study. The number of casts before percutaneous tenotomy was counted. Correlations were calculated between corrective casts and age, Pirani, Dimeglio scores and their individual components.

RESULTS

Mean age of children was 63.7 days and average number of casts applied was 3.2. Age at presentation and number of casts had no correlation with r = 0.034 (p < 0.001). The correlation between initial Pirani score (average 5.39) and Dimeglio score (average 13.4) to number of casts was 0.35 (p < 0.001)and 0.56 (p < 0.0001) respectively. Among individual components of Pirani score, medial crease and rigid equinus had maximum correlation to the number of casts whereas empty heel sign had the lowest. For Dimeglio score, equinus and varus correlated the most and posterior crease the least. Pirani and Dimeglio scores were highly correlated (r = 0.87) to each other except for very supple or severe deformity.

CONCLUSIONS

In infancy, the age at presentation had no bearing on number of casts. Both scoring systems had positive correlation in terms of corrective casts for our population. The Dimeglio fared slightly better than Pirani scores.

Clubfoot treatment with Ponseti method-parental distress during plaster casting

Background

Clubfoot is one of the most prevalent musculoskeletal congenital defects. Gold standard treatment of idiopathic clubfoot is the conservative Ponseti method, including the reduction of deformity with weekly serial plaster casting and percutaneous Achilles tenotomy. It is well known that parents of children with severe and chronic illnesses are mentally stressed, but in recent studies regarding clubfoot treatment, parents were only asked about their satisfaction with the treatment. Largely unknown is parental distress before and during plaster casting in clubfoot.

Therefore, we want to determinate first, how pronounced the parents’ worries are before treatment and if they decrease during the therapy. Second, we hypothesized that parents faced with an extreme deformity (high Pirani score), reveal more distress, than parents whose children have a less pronounced deformity (low Pirani score). Therefore, we wanted to investigate whether the Pirani score correlates with the parents’ mental resilience in relation to the therapy of the child as a global distress parameter.

Methods

To answer this question, we developed a questionnaire with the following emphases: Physical capacity, mental resilience, motion score, parents score, and child score with point scores 1 (not affected) to 6 (high affected). Subsequently, we interviewed 20 parents whose children were treated with clubfeet and determined the Pirani score of the infants at the beginning (T₀) and at the end (T_E) of the treatment with plaster casting.

Results

High values were obtained in child score (Mean (M) = 3.11), motion score (M = 2.63), and mental resilience (M = 2.25). During treatment, mental resilience improved (p = 0.015) significantly. Spearman correlation coefficient between Pirani score (T₀) and mental resilience (T₀) is 0.21, so the initial hypothesis had to be rejected.

Conclusion

The issues of the children are in the focus of parental worries concerning clubfoot treatment, especially the assumed future motion and the assumed ability to play with other children. Particular emphasis should be placed on educating parents about the excellent long-term results in the function of the treated feet especially as this topic shows the greatest parental distress.

Influence of Beginning Time of Casting for Clubfoot Treatment by Ponseti Method in Different Age Group Infants: A Retrospective Study

BACKGROUND

The clubfoot is one of the commonly found congenital deformities in newborn. The Ponseti method is the most effective nonoperative clubfoot management method. It is based on understanding of pathoanatomy of clubfoot. For classifying severity of clubfoot, Pirani score is used. The number of cast required for clubfoot correction is dependent on its initial Pirani score. This study aimed on how the number of cast for correction of clubfoot deformity depends on starting time of casting and pretreatment Pirani score.

MATERIALS AND METHODS

This study comprises of 200 patients with 297 affected foot nonoperatively managed with Ponseti technique of casting. We measured initial and final Pirani scores of patients with different age groups.

RESULTS

We found that initial severity was less in 0-1 month age group children but mean casting number was more while initial severity was more in 1-2 month age group, the mean number of casting was less. Tenotomy requirement was also less in 1-2 month age group.

CONCLUSION

We concluded that casting according to the Ponseti method should be started in 1-2 months age group which shows better results than the other age groups in clubfoot.

Correlation of scores with number of Ponseti casts required for clubfoot correction in the older child

BACKGROUND

We examined the correlation between initial Pirani and Dimeglio scores and their individual components to the number of casts for older clubfoot children.

METHODS

Twenty seven patients (39 feet) aged 2-11 years with idiopathic clubfeet were treated using the Ponseti technique and correlation with number of corrective casts calculated. The number of cast required was counted from application of primary cast to the time of initiation of the foot abduction orthosis.

RESULTS

Average 8.45 ± 2.31 (range, 4-13) casts were used for treatment. A low correlation (r = 0.203) was identified when total Dimeglio score was compared with the number of casts. No correlation was identified for Pirani score (r = 0.023). Among individual components, only cavus deformity had a significant positive correlation to cast numbers.

CONCLUSIONS

The Pirani and Dimeglio classifications still remain the most widely practiced clubfoot severity grading systems for the older clubfoot child. However, their prognostic value to predict the total cast duration from initial severity remains questionable.

A Modified Ponseti Method for the Treatment of Rigid Idiopathic Congenital Clubfoot

This study reviewed the efficacy of a modified Ponseti method (MP) for treating rigid clubfeet insufficiently corrected by the classic Ponseti method. Briefly, the MP consisted of 3 procedures. First, Achilles tenotomy, abductor hallucis tenotomy, and plantar fasciotomy were conducted through 3 small incisions. Second, the talocalcaneal and talonavicular joints were manually reduced. Third, plaster immobilization was introduced to maintain the initial correction. Dimeglio scores, radiographs, and pain evaluations were used to analyze outcomes. All 38 patients with 56 clubfeet enrolled in the present study achieved initial correction after the MP, followed by a mean of 3.68 ± 0.77 (range 3 to 5) cast immobilizations, which were changed each week. The average duration of treatment was 30.63 ± 6.45 days (range 23 to 47), and 6 (10.71%) clubfeet exhibited cast-related pressure injury. After a mean follow-up period of 19.71 ± 4.83 months (range 12.47 to 31.33), no child presented foot pain, and except for 1 patient with relapse, all patients received correction, with Dimeglio scores of 0.55 ± 1.06 points (range 0 to 7). The recurrence rate was 1.79% (1 of 56) at the first year. The anteroposterior talocalcaneal angle was 34.83° ± 10.65°, and the lateral talocalcaneal angle was 31.38° ± 9.86° at the last follow-up period, and both were significantly improved compared with the corresponding preoperative angles (p < .001). The anteroposterior talus-first metatarsal angle was 12.33° ± 10.04°, and the lateral calcaneal tibial angle was 74.15° ± 14.12°, which were significantly decreased compared with the preoperative values (p < .001). In conclusion, the present short-term evaluation of this minimally invasive soft-tissue release method showed promising results for treating rigid clubfoot that was not responsive to the traditional Ponseti method.

Prediction of Number of Casts and Need of Tenotomy Using Pirani Score in the Management of Clubfoot

BACKGROUND

Clubfoot also called as congenital tailpipes equinovarus is a complex ankle and foot deformity characterized by forefoot adduction and supination, midfoot cavus and hindfoot varus and equinus. It is estimated that more than 100,000 babies are born each year worldwide with clubfoot, and 80% are seen in developing nations. Different scoring systems are used for grading the severity of deformity or monitoring the natural history of clubfoot. The Pirani scoring system is now routinely used in most clubfoot clinics, including Cure Ethiopia, Children's Hospital.

METHODS

A facility based retrospective study was conducted on 278 idiopathic club feet successfully treated by the Ponseti method and scored by Pirani system between September 2013/14 to September 2017/2018. Age at presentation, number of casts required, need for percutaneous Achilles tenotomy, casting effects were recorded.

RESULTS

A total of 287 clinical folders of children were retrieved (424 feet). The mean (±SD) number of casts required for correction of the deformity was 5.54 ± 1.63. The number of cast required for correction is significantly, and positively correlated with initial severity of Pirani score (r = 0.62 for right foot; r = 0.675 for left foot). There is a significant difference on the overall initial Pirani score between tenotomy and non- tenotomy group (P value < 0.001).

CONCLUSION

The study revealed that severity of initial Pirani score can be used to estimate the number of Ponseti cast required for correction of clubfoot deformity and the need for tenotomy. Besides, the number of Ponseti cast required may not be affected by age of a child at the commencement of treatment.

Interobserver reliability of Diméglio and Pirani score and their subcomponents in the evaluation of idiopathic clubfoot in a clinical setting: a need for improved scoring systems

PURPOSE

Diméglio (DimS) and Pirani (PirS) scores are the most commonly used scoring systems for evaluation of clubfoot, with many centres performing both. Interobserver reliability of their global score has been rated high in a few studies, but agreement of their subcomponents has been poorly investigated. The aim of the study was to assess interrater reliability of global scores and of items in a clinical setting and to analyse overlapping features of the two scores.

METHODS

Fifty-six consecutive idiopathic clubfeet undergoing correction using the Ponseti method were independently evaluated at each casting session by two trained paediatric orthopaedic surgeons using both scores. Interobserver reliability of collected data was analysed; a kappa coefficient > 0.60 was considered adequate.

RESULTS

For DimS and PirS, the Pearson correlation coefficients were 0.87 and 0.91 (p < .0001) respectively, and kappa coefficients were 0.23 and 0.31. Among subcomponents, kappa values were rated > 0.60 only for equinus and curvature of lateral border in PirS; muscular abnormality in DimS was rated 0.74 but a high prevalence index (0.94) indicated influence of scarce prevalence of this feature. All other items showed k < 0.60 and were considered to be improved.For overlapping features: posterior and medial crease showed similar agreement in the two systems, items describing equinus and midfoot adduction were much more reliable in PirS than in DimS.

CONCLUSIONS

In a clinical setting, despite a high correlation of evaluations for total scores, the interobserver agreement of DimS and PirS was not adequate and only a few items were substantially reliable. Simultaneous use of two scores seemed redundant and some overlapping features showed different reliability according to criterion or scale used. Future scoring systems should improve these limitations.

LEVEL OF EVIDENCE

Level I - Diagnostic studies.

Proposal of an innovative casting technique for correction of clubfoot according to Ponseti method: a pilot study

A total of 70 clubfeet were treated by a posterior above-knee cast (pressure points on the talus and on the first metatarsal) according to Ponseti method. At diagnosis, average Pirani score was 4.44, and mean time of treatment was 50.32 days. Overall, 27 (38.6%) clubfeet had only conservative treatment (5.29 casts) and 43 (61.4%) also had Achilles tenotomy (6.38 casts). At the end 61/70 feet (87.14%) had Pirani score 0; 10/70 feet (5.71%) had Pirani score 0.5. The Pirani score gain/cast was β=-0.432 (P<0.001). This new casting technique is safe and effective at avoiding some adverse issues related to the removal of the conventional cast.

An Analysis of the Mechanical Properties of the Ponseti Method in Clubfoot Treatment

Congenital clubfoot is a complex pediatric foot deformity, occurring in approximately 1 in 1000 live births and resulting in significant disability, deformity, and pain if left untreated. The Ponseti method of manipulation is widely recognized as the gold standard treatment for congenital clubfoot; however, its mechanical aspects have not yet been fully explored. During the multiple manipulation-casting cycles, the tendons and ligaments on the medial and posterior aspect of the foot and ankle, which are identified as the rate-limiting tissues, usually undergo weekly sequential stretches, with a plaster of Paris cast applied after the stretch to maintain the length gained. This triggers extracellular matrix remodeling and tissue growth, but due to the viscoelastic properties of tendons and ligaments, the initial strain size, rate, and loading history will affect the relaxation behavior and mechanical strength of the tissue. To increase the efficiency of the Ponseti treatment, we discuss the theoretical possibilities of decreasing the size of the strain step and interval of casting and/or increasing the overall number of casts. This modification may provide more tensile stimuli, allow more time for remodeling, and preserve the mechanical integrity of the soft tissues.

Clinical outcomes and risk-factor analysis of the Ponseti Method in a low-resource setting: Clubfoot care in Haiti

Purpose

The Ponseti Method has dramatically altered the management of clubfoot, with particular implications for limited-resource settings. We sought to describe outcomes of care and risk factors for sub-optimal results using the Ponseti Method in Haiti.

Methods

We conducted a records review of patients presenting from 2011–2015 to a CURE Clubfoot clinic in Port-au-Prince, Haiti. We report patient characteristics (demographics and clinical), treatment patterns (cast number/duration and tenotomy rates), and outcomes (relapse and complications). We compared treatment with benchmarks in high-income nations and used generalized linear models to identify risk factors for delayed presentation, increased number of casts, and relapse.

Results

Amongst 168 children, age at presentation ranged from 0 days (birth) to 4.4 years, 62% were male, 35% were born at home, 63% had bilateral disease, and 46% had idiopathic clubfeet. Prior treatment (RR 6.33, 95% CI 3.18–12.62) was associated with a higher risk of delayed presentation. Risk factors for requiring ≥ 10 casts included having a non-idiopathic diagnosis (RR 2.28, 95% CI 1.08–4.83) and higher Pirani score (RR 2.78 per 0.5 increase, 95% CI 1.17–6.64). Female sex (RR 1.54, 95% CI 1.01–2.34) and higher Pirani score (RR 1.09 per 0.5 increase, 95% CI 1.00–1.17) were risk factors for relapse. Compared to North American benchmarks, children presented later (median 4.1 wks [IQR 1.6–18.1] vs. 1 wk), with longer casting (12.5 wks [SD 9.8] vs. 7.1 wks), and higher relapse (43% vs. 22%).

Conclusions

Higher Pirani score, prior treatment, non-idiopathic diagnosis, and female sex were associated with a higher risk of sub-optimal outcomes in this low-resource setting. Compared to high-income nations, serial casting began later, with longer duration and higher relapse. Identifying patients at risk for poor outcomes in a low-resource setting can guide counseling, program development, and resource allocation.

ARE SCORING SYSTEMS USEFUL FOR PREDICTING RESULTS OF TREATMENT FOR CLUBFOOT USING THE PONSETI METHOD?

Objective:

The aim of this study was to verify whether the Pirani and Dimeglio clinical scoring systems could predict results of Ponseti therapy.

Methods:

Forty-seven patients with clubfoot deformities treated with the Ponseti method were enrolled in the study. Clinical evaluation with the Pirani and Dimeglio scoring systems was performed before the treatment and after the second cast fixation. The number of fixations, necessity for achillotomy, and recurrence of the deformity were determined as parameters of the therapy results. The patients were divided into three groups according to the severity of their deformities, and the groups were compared with one another.

Results:

Clubfoot correction required an average of 6.8 casts. Five patients developed a recurrence. Comparing the therapy outcomes among the groups, we found statistically significant differences in the Pirani classification after the second fixation (the number of casts [p =.003] and necessity to perform an achillotomy [p =.014]) and in the Dimeglio scores before therapy (number of casts [p =.034]) and after the second fixation (number of relapses [p =.032]).

Conclusion:

Although clinical scoring systems showed some dependence on the parameters of treatment outcomes, their predictive function can be used in only a limited way. Level of evidence II, Prospective comparative study.

Prognosticating Factors of Relapse in Clubfoot Management by Ponseti Method

BACKGROUND

It is challenging that some Ponseti method corrected clubfeet have a tendency to relapse. Controversies remain as to the implication of initial severity, representing the deformity degree, as well as number of casts needed, representing the treatment process, in predicting relapse. However, no study has been reported to take these 2 parameters into comprehensive consideration for outcome measurement. The purpose of this study is to investigate the correlation between the initial Pirani score and the number of casts required to correct the deformity in our series; to evaluate noncompliance as a risk factor of the deformity recurrence in Ponseti treatment; to test the validity and predictive value of a new proposed parameter, ratio of correction improvement (RCI) which is indicated by the initial Pirani scores divided by the number of casts.

METHODS

A total of 116 consecutive patients with 172 idiopathic clubfeet managed by Ponseti method were followed prospectively for a minimum of 2 years from the start of brace wearing. RCI value and the other clinical parameters were studied in relation to the risk of relapse by using multivariate logistic regression analysis modeling.

RESULTS

A positive correlation between the initial Pirani score and the number of casts required to correct the deformity was found in our series (r=0.67, P<0.01). There were 45 patients (39%) with brace noncompliance. The relapse rate was 49% (22/45). The odds ratio of relapse in noncompliant patients was 10 times more that in compliant patients (odds ratio=10.30 and 95% confidence interval, 2.69-39.42; P<0.01). The multivariate logistic regression analysis showed that there was significant association between relapse and RCI value. There were 42 patients (36%) with RCI value <1, among them, the relapse rate was 57% in 24 patients. The odds ratio of relapse in patients with RCI value <1 was 27 times more likely to relapse than those >1 (odds ratio=26.77 and 95% confidence interval, 5.70-125.72; P<0.01).

CONCLUSIONS

On the basis of the findings from our study, we propose the RCI to be a new parameter in predicting the risk of relapse in Ponseti method of clubfoot management. Early intervention is recommended to optimize the brace compliance particularly in case with lower RCI value.

LEVEL OF EVIDENCE

Level II-prognostic.

The effectiveness of sustainable serial casting for clubfoot deformity in a low resource setting

Aims

Our aim was to assess the effectiveness of the Malawi Clubfoot Programme and comment on such health care strategies in developing countries.

Methods

Medical records of 1069 children attending 29 clinics within Malawi were identified between 2007 and 2013. Due to incomplete recording, only 596 patients had adequate data which could be further analysed.

Results

The mean age of presentation was 103 days (range 0–8 years) with a sex distribution of M1.76:F1. The mean Pirani score at presentation was 4.55 and on completion of casting was 1.39. A correlation was identified between the number of castings and the initial Pirani score (positive coefficient 0.2626 p<0.0001), the final casting score (negative coefficient -0.1441 p<0.0006) and the change in Pirani score (positive coefficient 0.3200 (p<0.0001)). The number of patients attending the clinics increased per year and the average number of castings was reduced from 6 to 5 between 2008 and 2012. There was also moderate correlation between the number of years the programme had been re-instated and the average change in Pirani score between in each casting (R score 0.36)

Conclusion

Serial casting performed by paramedical personnel within an established self- sustained national programme can effectively treat CTEV in low resource countries.

Comparison of Dimeglio and Pirani score in predicting number of casts and need for tenotomy in clubfoot correction using the Ponseti method

PURPOSE

The Dimeglio and the Pirani scores are largely used to rate clubfoot at presentation and monitor correction. To date, the accuracy of these scores in predicting appropriate treatment is controversial. The aim of this study was to investigate the accuracy of Dimeglio and Pirani scores in predicting the number of casts and the need for tenotomy in clubfoot correction using the Ponseti method.

METHODS

Ninety-one consecutive feet (54 patients; mean age at presentation: 28 ± 15 days) undergoing clubfoot correction using the Ponseti method were prospectively followed from first casting to correction. All feet were scored according to the Dimeglio and Pirani score. The relationships between the two scores, the number of casts and the need for tenotomy were analysed.

RESULTS

Initial correction was achieved in all feet. Both Dimeglio (r = .73; p value < .0005) and Pirani scores (r = .56; p value < .000) showed good association with the number of casts. Multiple linear regression showed a high collinearity of the two scores but a more significant contribution of the Dimeglio score. Among subcomponents, hindfoot score, midfoot score, varus and muscular abnormality were independent predictors of the number of casts. Both Dimeglio and Pirani scores were significantly associated with the need for tenotomy (p value = .0000), and odds ratios and cut-off points were calculated. The receiving operator curve (ROC) analysis showed slightly better performance of the Dimeglio in comparison with the Pirani score in predicting the need for tenotomy, but the difference between the two areas under the curve (AUC) was not significant (p = .48).

CONCLUSIONS

A quite accurate prediction of the number of casts and the need for tenotomy can be performed in most cases. The Dimeglio score showed slightly better accuracy in predicting both steps of Ponseti treatment.

Use of the Pirani score in monitoring progression of correction and in guiding indications for tenotomy in the Ponseti method: Are we coming to the same decisions?

PURPOSE

The Pirani score is widely used in the treatment of idiopathic clubfoot. Some authors recommended to base decision for Achilles tenotomy in Ponseti method on this score (hindfoot score [HFS] > 1, once reducibility of lateral head of talus (LHT) is zero) instead of originally described indications (dorsiflexion < -10-15° once complete abduction is achieved). Yet correspondence of these indications has not been evaluated. Aim of this study was to verify whether in a cohort, where decision is based on dorsiflexion, the Pirani score corresponds to the limits suggested. Secondarily, to describe temporal variation in Pirani score along treatment, which has not been previously investigated.

METHODS

In a prospective study, 79 idiopathic clubfeet in 47 cases consecutively treated with Ponseti method by a single orthopaedic surgeon were evaluated at each casting session with Pirani system; score progression and scores at time of decision to perform tenotomy were determined.

RESULTS

HFS and its subcomponents showed minimal improvement during subsequent sessions of casting and then rapid correction with tenotomy. Medial crease resolved rapidly. Midfoot score and its remaining subcomponents corrected gradually. Total Pirani score showed initially a progressive correction and then a more abrupt improvement with tenotomy. At the time of decision to perform tenotomy, in 8 (10.1%) of 79 cases, the decision whether or not to perform tenotomy based on dorsiflexion would have been different based on the cut-offs for Pirani score suggested.

CONCLUSION

Using Pirani score in guiding indication for tenotomy may imply different decisions in a portion of cases, which should be considered when comparing series.

A Self-Reported Needs Assessment Survey of Pediatric Orthopaedic Education in Haiti

OBJECTIVE

The burden of musculoskeletal disease remains high in low-income countries, with a high rate of pediatric disease. Efforts continue for orthopedic education, but there is little guidance on local needs and desires. Our aim was to determine the specific content and modalities that would be most useful for pediatric orthopedic educational programs abroad, and we demonstrate a practical method of identifying country-specific educational deficits through a self-reported needs survey in Haiti.

DESIGN

A cross-sectional survey was administered using an automated response system. We obtained demographic information as well as training and practice patterns, comfort levels with pediatric diagnoses, and desired topics for education using a 5-point Likert Scale.

SETTING

Haitian Annual Assembly for Orthopaedic Trauma (HAAOT), the only national, continuing medical education conference for orthopedic providers in Haiti.

PARTICIPANTS

Of 60 eligible participants, 51 were included in the final analysis.

RESULTS

Time spent on pediatric orthopedics varied widely, centered at 10% to 25%. Median comfort level with pediatric orthopedics was 3 of 5. Skills with lowest self-reported competence included spica casting, clubfoot casting, and management of supracondylar humerus fractures. Skills with highest self-reported competence were long-leg casting and Salter-Harris classification. Modes of education highly requested included didactics/lectures, hands-on sessions, dedicated rotations, and exchanges with foreign peers/mentors. Diagnoses most encountered were osteomyelitis, trauma, and clubfoot; lowest comfort levels were in neuromuscular, spine, lower extremity deformity, congenital hip, and clubfoot; and most requested for future teaching were congenital hip, neuromuscular, and spine.

CONCLUSIONS

Haitian orthopedic providers express a strong desire and need for ongoing pediatric orthopedic education. They describe a high prevalence of trauma and infection, but convey a requirement for more comprehensive, multimodal teaching that also includes congenital deformities/dysplasias, neuromuscular, and spine. Our results demonstrate the importance of assessing country-specific needs and involving local care providers in curriculum development.

The Correlation of Pirani and Dimeglio Scoring Systems for Ponseti Management at Different Levels of Deformity Severity

The Pirani and Dimeglio scoring systems both have excellent inter-observer and intra-observer reliability, but no research has been conducted to determine their inter-observer reliability and their relationship at different levels of deformity. A total of 173 idiopathic clubfoot cases were reviewed using Pirani and Dimeglio scoring systems, and the number of casts needed was also recorded. For clubfeet with a cast number equal to 2 or 7 and 8, the inter-observer reliability of the two scoring systems was poor or moderate, and there was no correlation between the two scoring systems. There was also no correlation between the Dimeglio scoring score with the number of casts for grade II or IV clubfeet. A binary regression of the number of casts on initial Pirani or Dimeglio scores showed that there was a Quadratic or Cubic relation between the scores and the cast numbers. In conclusion, in the case of mild and very severe clubfoot deformity, the interobserver reliability and its ability to predict the number of casts needed for clubfoot deformity correction was poor. A more objective evaluation system may be required.

Nail changes in casted and braced clubfoot: A preliminary study

BACKGROUND

The study aimed at finding whether there are any nail changes specific to treatment in clubfoot.

METHODS

Sixty new, 26 undergoing serial corrective casting, and 247 clubfoot patients using foot abduction braces were prospectively studied. The casted and braced group formed the basis of the study to observe nail changes, if any. The new patients and opposite normal foot (in unilateral casted cases) were taken as controls.

OBSERVATIONS

Acute paronychia, ingrown toe nail, onychoshizia, onychorrhexis, nail plate concavity, latent onychomadesis, and distal onycholysis were observed in feet undergoing corrective casting and bracing. Micronychia, malalignment and thinning of nail plate were the observed congenital nail anomalies.

CONCLUSIONS

Nail changes in clubfeet are not infrequent. Certain nail changes might be etiologically linked to casting and bracing. Some of nail changes might require urgent medical care.

Evolution of clubfoot deformity and muscle abnormality in the Ponseti method: evaluation with the Dimeglio score

PURPOSE

The modality of progression of the correction along casting sessions of Ponseti method has been poorly investigated and information regarding evolution of muscular abnormalities is missing. The aim of the study was to investigate dynamics of correction of the different components of clubfoot deformity in a clinical setting.

METHODS

In a prospective study, 124 clubfeet consecutively treated by a single orthopaedic surgeon were evaluated with the Dimeglio system at each casting session and score progression was determined.

RESULTS

For each component a typical pattern was recorded. Cavus and medial crease showed a rapid correction. Rotation, adduction and varus corrected gradually and simultaneously. The posterior crease usually persisted until final cast was discontinued. Equinus improved progressively after each cast and then to a larger extent with Achilles tenotomy. The parameter describing poor muscular condition, reported at presentation in 39 feet (31.5%), was the only item showing extremely different dynamics of correction (from rapid and complete resolution to persistence at last cast removal), which could be explained by the large diversity of entities included (hypertonia, imbalance, fatty infiltration, fibrosis, aplasia).

CONCLUSIONS

This study confirmed that dynamics of correction in clinical setting correspond essentially to theoretical principles of Ponseti method. Muscle abnormalities are not uncommon in clubfeet and have great influence on the progression of correction. If abnormalities are recorded, their evolution along the treatment should be monitored. A more objective evaluation would be required.