Botulinum toxin A does not improve the results of cast treatment for idiopathic toe-walking: a randomized controlled trial

Red Flags in the Evaluation of the Tiptoeing Child

BACKGROUND

Tiptoeing is a common phenomenon in gate development. However, in some cases, it can be the first clinical sign of a medical condition, more often a neurological or muscle disorder.

AIM

To provide a practical guide for paediatricians on how to approach tiptoeing and its possible causes.

METHODS

Input from the literature were used to construct this guide. We evaluated articles both on the general topic and the various conditions associated with tiptoeing.

RESULTS

Red flags in tiptoeing are its persistence for more than 6 months after the establishment of independent walking, its persistence after 2 years of age and its appearance afterwards. Historical and physical examination clues, together with few blood tests and radiological investigations, are key elements to direct the clinician's diagnosis in the right direction, especially nowadays, considering that many of these conditions have a specific treatment.

CONCLUSION

In presence of red flags, tiptoeing should never be underestimated and must be considered a sign of a pathological condition until proven otherwise.

Little Evidence for Conservative Toe Walking Interventions in Autism Spectrum Disorders: a Systematic Review

This systematic review summarizes the evidence about toe walking (TW) interventions in persons with autism. Following the PRISMA guidelines, a systematic search of MEDLINE, CINAHL, PsycINFO, The Cochrane Library, Google Scholar, and Opengrey was performed. Nine articles (all case reports or case series) were included. Methodological quality was assessed using the Mayo Evidence-Based Practice Centre tool. The included studies considered 17 subjects (16 males; age range: 4–15 years). All studies reported a reduction of TW frequency, but the follow-up was lacking in seven studies. There is a lack of high-quality studies with a sufficiently large and well-characterized sample to assess the effectiveness of TW interventions in autistic persons. These findings strongly support the need for further research in this area.

Current developments in surface electromyography

Background/aim

Surface electromyography (surface EMG) is a primary technique to detect the electrical activities of muscles through surface electrodes. In recent years, surface EMG applications have grown from conventional fields into new fields. However, there is a gap between the progress in the research of surface EMG and its clinical acceptance, characterized by the translational knowledge and skills in the widespread use of surface EMG among the clinician community. To reduce this gap, it is necessary to translate the updated surface EMG applications and technological advances into clinical research. Therefore, we aimed to present a perspective on recent developments in the application of surface EMG and signal processing methods.

Materials and methods

We conducted this scoping review following the Joanna Briggs Institute (JBI) method. We conducted a general search of PubMed and Web of Science to identify key search terms. Following the search, we uploaded selected articles into Rayyan and removed duplicates. After prescreening 133 titles and abstracts, we assessed 91 full texts according to the inclusion criteria.

Results

We concluded that surface EMG has made innovative technological progress and has research potential for routine clinical applications and a wide range of applications, such as neurophysiology, sports and art performances, biofeedback, physical therapy and rehabilitation, assessment of physical exercises, muscle strength, fatigue, posture and postural control, movement analysis, muscle coordination, motor synergies, modelling, and more. Novel methods have been applied for surface EMG signals in terms of time domain, frequency domain, time-frequency domain, statistical methods, and nonlinear methods.

Conclusion

Translating innovations in surface EMG and signal analysis methods into routine clinical applications can be a helpful tool with a growing and valuable role in muscle activation measurement in clinical practices. Thus, researchers must build many more interfaces that give opportunities for continuing education and research with more contemporary techniques and devices.

Development of the Idiopathic Toe Walking Outcome (iTWO) proforma: A modified delphi study and online parent survey for measurement consensus

BACKGROUND

Idiopathic toe walking (ITW) is an exclusionary diagnosis given when children toe walk without a medical reason. Treatment effectiveness studies rarely collect data other than ankle range of motion or presence of toe walking.

RESEARCH QUESTION

To develop a set of outcome measures identified by health professionals for use when providing treatment with children who have ITW, to understand if parents agreed with this set, and if parents believed they could perform these measures in clinician absence.

METHODS

Study 1 developed consensus and agreement on outcome measures for children receiving treatment for ITW through the modified Delphi technique with 10 expert health professionals. Parents of children who toe walked were invited to participate in an online survey for the second study, in which they were asked to rate the importance of these measures and if they believed they may be able to collect the data about their child without the health professional being present.

RESULTS

Ten health professionals developed nine questions and assessments through consensus and agreement over the three rounds. There were 34 parents providing information about satisfaction with toe walking assessments and treatments. Of these, 27 provide detailed responses about the outcome questions and assessments. The majority (91 % of 24 parents) in support of the outcome measures identified by experts. Parents expressed a willingness to self-complete questions or be taught assessments to monitor their child's progress.

SIGNIFICANCE

Use of these clinically based measures may enable consistent data collection regardless of the setting and provide the foundation for large data pooling in future treatment research.

Idiopathic Toe Walking: An Update on Natural History, Diagnosis, and Treatment

Toe walking is a common presenting report to an orthopaedic practice. Evaluation of a child with toe walking includes a thorough history and physical examination to elucidate the diagnosis. When no other diagnosis is suspected, a diagnosis of idiopathic toe walking is often given. Despite the high prevalence of the condition, there is notable controversy of the nomenclature of the disease. Recent research has shed more light on both the natural history and the genetic basis. The use of motion analysis, including EMG and multisegment foot model, may help both differentiate children with mild forms of cerebral palsy and evaluate outcomes after treatment. Early treatment for young children with adequate range of motion (ROM) is generally reassurance because most young children with idiopathic toe walking are expected to resolve spontaneously. When the toe walking persists, treatment options include both surgical and nonsurgical management. Nonsurgical management centers on obtaining ROM through stretching and serial casting, followed by gait retraining and bracing treatment. Surgical lengthening at either the Achilles or gastrocnemius level improves the ROM of the ankle and then similarly requires therapy and bracing treatment to obtain a more normalized gait.

Effects of wearing a foot orthosis on ankle function in children with idiopathic toe walking during gait

Background

Idiopathic toe walking (ITW) is a gait deviation characterized by forefoot contact with the ground, possibly enhancing the risk of falling and causing Achilles' tendon shortening and psychological discomfort. Between possible treatments, foot orthosis may limit ITW when worn. With these premises, the effects of a novel foot orthosis (A.Dyn.O.®) on ankle function were analyzed in children with ITW during gait.

Methods

Twenty-one children were recruited in the study after ITW diagnosis. At follow-up assessment after a habituation period of at least two weeks, participants walked in barefoot condition and while wearing A.Dyn.O.®. Kinetics and kinematics were derived from a multi-segment foot model using an optoelectronic system. Gait spatiotemporal parameters, ankle kinetic and kinematic and rockers timing were analyzed. Lastly, ITW severity was classified according to Alvarez classification. Differences between conditions were verified with paired t-test. Statistical parametric mapping was used to evaluate differences in the entire kinematic and kinetic waveforms.

Findings

Wearing A.Dyn.O.®, step cadence was reduced, step length, stance phase and stride duration increased; physiological heel rocker was present, thus postponing the timing of ankle and forefoot rockers; ankle dorsiflexion angular excursion, range of motion, maximal dorsiflexor and plantarflexor moments together with maximal power absorption and production were all amplified.

Interpretation

While wearing it, A.Dyn.O.® limited gait deviations typical of ITW and improved ITW severity classification for most of the participants. These findings suggest that the use of A.Dyn.O.® may assist ITW treatment, preventing children from toe walking and thus limiting its side effects.

The Management of Toe Walking in Children with Autism Spectrum Disorder: "Cast and Go"

Background: Toe walking is associated with autism spectrum disorders (ASD). Correction of this “behavior” is a health challenge. The toe walker is affected by the contact refusal with the outside world: touching the ground as little as possible, trying to avoid any contact. A structured equines foot is a possible consequence. Method: We present the “Cast and Go” protocol, used in 22 idiopathic toe walker children with ASD treated from 2015 to 2020. The treatment was performed by a single senior experienced doctor with botulinum injection, ankle casts and rehabilitative therapies. All patients underwent pre- and post-treatment clinical evaluation using ankle dorsiflexion angle and casting number as treatment. We aimed to identify the intervention with the shortest acquisition time for the management of toe walking. Results: Our findings demonstrated the baseline ankle dorsiflexion angle influenced the casting number (p < 0.01) and male patients had a higher baseline ankle dorsiflexion angle than female patients (p < 0.01). No adverse events were observed. Conclusions: These findings suggested that the “Cast and Go” protocol could be a promising, dynamic and effective practice for toe walking disease in ASD patients.

Children with idiopathic toe walking display differences in lower limb joint ranges and strength compared to peers: a case control study

Background

Idiopathic toe walking (ITW) is an exclusionary diagnosis. There has been limited exploration of lower limb active range of motion and strength measures in children with ITW. This researched aimed to determine any differences in lower limb muscle active range of motion and strength in children who have ITW, compared to normative data collected from children who displayed typical gait.

Methods

Children were recruited with had a diagnosis of ITW, aged between 4 and 10 years, and no recent treatment. Data collected included parent reported data such as time spent toe walking, percentage of time spent toe walking, and clinician collected data such as age, height and weight. Joint ranges of motion and strength measures were collected by an experience clinician. Active and weight bearing joint ranges of motion were evaluated with a goniometer or digital inclinometer. Lower limb muscle strength measures were evaluated with a hand-held dynamometer. Published normative data sets were used for comparison. Measures were analysed with regression analyses to determine differences between groups in different measures, considering measures known to impact range and strength. Odds ratios (OR), 95% confidence intervals (CI) and p values were reported.

Results

Twenty-six children with ITW participated. Reduced weight bearing ankle range of motion, when measured with the knee bent, was associated with being in the ITW group (p = 0.009), being older (p < 0.001) and weighing less (p < 0.001). Reduced ankle plantar flexion range was only associated with being in the ITW group (p = 0.015). For all lower limb strength measures, excluding hip external rotation, children who displayed greater strength, did not toe walk (p < 0.002), were older (p < 0.001) and weighed more (p < 0.014). with ITW.

Conclusion

Children with ITW displayed reduced overall plantar and dorsiflexion at the ankle, compared to non-toe walking children. Reduced plantarflexion is children with ITW has not been described before, however reduced dorsiflexion is commonly reported. Children with ITW were weaker in many lower limb measures, even when age and weight were considered. This should lead clinicians and researchers to pay greater attention to lower limb strength measures in this population.

Children who idiopathically toe-walk have greater plantarflexor effective mechanical advantage compared to typically developing children

PURPOSE

The effective mechanical advantage (EMA) of the plantarflexor muscles is important for gait function and is likely different from typical in equinus gait. However, this has never been quantified for children who idiopathically toe-walk (ITW), despite being routinely altered through clinical intervention.

METHODS

This study quantified the Achilles tendon and ground reaction force (GRF) moment arms, and the plantarflexor EMA of 5 children who ITW and 14 typically developing (TD) children, whilst walking on an instrumented treadmill.

RESULTS

There was no difference in the Achilles tendon moment arm length throughout stance between groups (p > 0.05). Children who ITW had a significantly greater GRF moment arm length in early stance (20-24% p = 0.001), but a significantly shorter GRF moment arm length during propulsion (68-74% of stance; p = 0.013) than TD children. Therefore, children who ITW had a greater plantarflexor EMA than TD children when active plantarflexion moments were being generated (60-70% of stance; p = 0.007). Consequently, it was estimated that children who ITW required 30% less plantarflexor muscle force for propulsion.

CONCLUSION

Clinical decision making should fully consider that interventions which aim to restore a typical heel-toe gait pattern risk compromising this advantageous leverage and thus, may increase the strength requirements for gait.

Idiopathic Toe-Walking in Children and Adolescents: Diagnosis, Natural History, and Treatment Options

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Idiopathic toe-walking is a diagnosis of exclusion.

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The natural history of idiopathic toe-walking has not been studied in many children; we identified only 1 prospective study. Of children without equinus contractures who were toe-walking before the age of 5.5 years, 59% had spontaneous resolution of toe-walking by 5.5 years of age, and 79%, by the age of 10 years.

»

Adverse consequences of toe-walking into adulthood have not been reported, but may exist, and further research is needed to define and clarify.

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If parents desire treatment to resolve their child's toe-walking, surgical lengthening of the Achilles tendon is the treatment with the highest chance of success and lowest relapse rate, and thus far, no complications have been reported in any surgical series.

Idiopathic Toe-Walking: A Review from 1967 to 2021

Idiopathic toe-walking (ITW) is considered a diagnosis of exclusion for which no underlying neurological, neuromuscular, neurodevelopmental, or orthopedic condition can be identified. The purpose of this review was to examine multiple aspects of ITW: natural history, evaluation, treatment, musculoskeletal manifestations, and developmental issues through the review of studies from the initial description of condition in 1967 to the present. From a PubMed search and review of reference lists of individual articles, 64 articles were selected and reviewed. The studied samples were variably described and often not well-defined. Gait analysis found gait characteristics associated with ITW that varied from normal. Children with ITW can be differentiated from children with cerebral palsy on the basis of several gait pattern features, but findings from electromyographic comparisons were variable. Treatments included orthoses, casting, botulinum toxin type A, and surgery. The evidence to support any specific treatment is limited by the small sample size and short duration of follow-up in the majority of studies. The inadequacy of the current literature suggests the need for a longitudinal multi-center study to more clearly define the population of children with ITW and to determine indications, timing, and effectiveness of the various available treatments.

Investigation of Muscle Strength, Motor Coordination and Balance in Children with Idiopathic Toe Walking: A Case-control Study

Purpose: To compare muscle strength, ankle dorsiflexion range of motion (ROM), motor coordination and balance, between children with and without Idiopathic Toe Walking (ITW).Materials and methods: This is an observational case-control study. The primary outcome is the triceps surae muscle strength. The secondary outcomes are the anterior tibialis muscle strength, lower limb balance, motor coordination, and ankle dorsiflexion ROM. Thirty-eight children were recruited: 19 between 5 to 11 years old with ITW and 19 healthy (control). Ankle dorsiflexion ROM, triceps surae, anterior tibialis muscle strength, motor coordination, and balance were assessed.Results: Children with ITW showed reduced triceps surae strength [mean difference (MD): 16.2 kgf/kg*100; 95% confidence interval (CI) -32.72 to 0.28; p = .05], reduced anterior tibialis strength (MD: 8.5 kgf/kg*100; 95% CI -13.35 to -3.05; p ≤ 0.001), reduced ankle dorsiflexion ROM (MD: 19.6 degrees; 95% CI 15.43 to 23.77; p ≤ 0.001) and impaired motor coordination and balance (MD: 17.7; 95% CI -25.54 to -9.82; p ≤ 0.001) compared to healthy children.Conclusion: Children with Idiopathic Toe Walking, presented in this study, demonstrated triceps surae and anterior tibialis muscle strength reduction, ankle dorsiflexion ROM reduction, impaired motor coordination, and balance compared to healthy children.

In vivo operating lengths of the gastrocnemius muscle during gait in children who idiopathically toe-walk

NEW FINDINGS

What is the central question of this study? What are the in vivo operating lengths of the gastrocnemius muscle in children who idiopathically toe-walk? What is the main finding and its importance? Children who idiopathically toe-walk operate at more plantarflexed positions but at longer fascicle lengths than typically developing children during gait. However, these ranges utilised during gait correspond to where children who idiopathically toe-walk are optimally strong. This should be considered when prescribing clinical treatments to restore typical gait.

ABSTRACT

Children who idiopathically toe-walk (ITW) habitually operate at greater plantarflexion angles than typically developing (TD) children, which might result in shorter, sub-optimal gastrocnemius fascicle lengths. However, currently no experimental evidence exists to substantiate this notion. Five children who ITW and 14 TD children completed a gait analysis, whilst gastrocnemius fascicle behaviour was simultaneously quantified using ultrasound. The moment-angle (hip, knee and ankle) and moment-length (gastrocnemius) relationships were determined from isometric maximum voluntary contractions (MVC) on an isokinetic dynamometer combined with ultrasound. During gait, children who ITW operated at more plantarflexed angles (Δ = 20°; P = 0.013) and longer muscle fascicle lengths (Δ = 12 mm; P = 0.008) than TD children. During MVC, no differences in the peak moment of any joint were found. However, peak plantarflexor moment occurred at significantly more plantarflexed angles (-16 vs. 1°; P = 0.010) and at longer muscle fascicle lengths (44 vs. 37 mm; P = 0.001) in children who ITW than TD children. Observed alterations in the moment-angle and moment-length relationships of children who ITW coincided with the ranges used during gait. Therefore, the gastrocnemius muscle in children who ITW operates close to the peak of the force-length relationship, similarly to TD children. Thus, this study indicates that idiopathic toe-walking is truly an ankle joint pathology, and children who ITW present with substantial alterations in the gastrocnemius muscle functional properties, which appear well adapted to the characteristic demands of equinus gait. These findings should be considered when prescribing clinical treatments to restore typical gait.

Orthotic treatment of idiopathic toe walking with a lower leg orthosis with circular subtalar blocking

BACKGROUND

There is no universally accepted treatment standard for idiopathic toe walking patients (ITW) in the current literature. None of the established methods provide homogenous satisfying results. In our department we treat ITW patients with lower leg orthoses with a circular foot unit for a total of 16 weeks. In this study we reviewed our database to evaluate the success of our treatment protocol for a 24 months follow up period.

RESULTS

Twenty-two patients were included in this study. Age at the beginning of treatment was 7.0 years +/- 2.9 (range 2.5-13.1). Percentage of ITW at the beginning of treatment according to the perception of the parents was 89% +/- 22.2 (range 50-100). Immediately after the treatment with our device, percentage of ITW dropped to 11% +/- 13.2 (range 0-50). After 12 months, 73% of the patients (16/22) walked completely normal or showed ITW less than 10% of the day. After 24 months, 64% of the patients kept a normal gait (14/22).

CONCLUSION

This study provides evidence that the treatment of idiopathic toe walking with lower leg orthoses with a circular foot unit results in satisfying long-term results in two thirds of the patients.

Surgical Outcomes for Severe Idiopathic Toe Walkers

BACKGROUND

Idiopathic toe walking (ITW) is a diagnosis of exclusion and represents a spectrum of severity. Treatment for ITW includes observation and a variety of conservative treatment methods, with surgical intervention often reserved for severe cases. Previous studies reviewing treatment outcomes are often difficult to interpret secondary to a mixture of case severity. The goal of this study was to review surgical outcomes in patients with severe ITW who had failed prior conservative treatment, as well as determine differences in outcomes based on the type of surgery performed.

METHODS

After IRB approval, all patients with surgical management of severe ITW at a single institution were identified. Zone II or zone III plantar flexor lengthenings were performed in all subjects. Clinical, radiographic, and motion analysis data were collected preoperatively and at 1 year following surgery.

RESULTS

Twenty-six patients (46 extremities) with a diagnosis of severe ITW from 2002 to 2017 were included. Zone II lengthenings were performed in 25 extremities (mean age=9.9 y) and zone III lengthenings were performed in 21 extremities (mean age=8.6 y). At the most recent follow-up, 100% of zone III lengthening extremities and 88% of zone II lengthening demonstrated decreased severity of ITW. Six extremities required additional treatment, all of which were initially managed with zone II lengthenings.

CONCLUSIONS

Severe ITW or ITW that has not responded to conservative treatment may benefit from surgical intervention. More successful outcomes, including continued resolution of toe walking, were observed in subjects treated with zone III lengthenings.

LEVEL OF EVIDENCE

Level III-case series.

A Retrospective Analysis of Nonoperative Treatment Techniques for Idiopathic Toe Walking in Children: Outcomes and Predictors of Success

BACKGROUND

The lack of consensus regarding optimal nonoperative management of idiopathic toe walking (ITW) results in wide variation in treatment across providers and institutions. Untreated toe walking can cause persistence of abnormal gait and symptomatic foot deformity in adulthood.

OBJECTIVE

To examine the outcomes of multiple commonly used nonoperative treatment techniques in a large cohort of children with ITW to better inform management of this condition.

DESIGN

Retrospective cohort study.

SETTING

Single tertiary care children's hospital from 2008 to 2015.

PATIENTS

Two hundred four children with ITW, aged 4 to 7 years at time of diagnosis, nonoperatively managed in orthopedic surgery, rehabilitation medicine, neurodevelopmental medicine, neurology, or physical therapy clinics.

INTERVENTIONS

Nonoperative techniques included observation, home stretching program, physical therapy program, use of ankle-foot orthoses (AFOs), and serial casting.

MAIN OUTCOME MEASURES

Greater than or equal to 10° of ankle dorsiflexion with the knee extended or walking on toes less than 25% of the time at last visit. Failure of treatment was defined as not achieving resolution criteria or requiring surgical intervention following failed nonoperative management.

RESULTS

Only 121 children (59.3%) attended at least one follow-up visit. Of those, 55 (45.5%) had a successful outcome. Increasing severity of ITW was associated with increased rate of follow-up (P = .03) and lower rates of successful treatment (P = .03). The use of AFOs was the only treatment modality associated with a successful outcome (unadjusted/adjusted odds ratio 3.97; [95% confidence interval, 1.80-8.74] and 4.81 [95% confidence interval, 1.91-12.1], respectively; P = .001).

CONCLUSIONS

Loss to follow-up is common in children with ITW. Of those children who returned to clinic, less than half had a successful outcome. The only treatment technique statistically associated with short-term resolution of toe walking was the use of AFOs.

An Assessment of Randomized Controlled Trial Quality in The Journal of Bone & Joint Surgery: Update from 2001 to 2013

BACKGROUND

The quality of reporting of randomized controlled trials (RCTs) published in The Journal of Bone & Joint Surgery (JBJS) from 1988 to 2000 was previously analyzed. The purpose of this current study was to analyze the quality of reporting of RCTs published in JBJS from 2001 to 2013 to identify trends over time and potential areas of improvement for future clinical trials.

METHODS

A manual search of the JBJS database identified RCTs published between January 2001 and December 2013. Quality assessments, using the Detsky quality-of-reporting index (Detsky score), a modified Cochrane risk-of-bias tool, and abstraction of relevant data identifying predictors of quality, were conducted.

RESULTS

A total of 5,780 publications were identified in JBJS from 2001 to 2013, with 285 RCTs (4.9%), representing an increase from the prior 13-year period. The overall mean transformed Detsky score (and standard error) increased significantly (p < 0.001) from 68.1% ± 1.67% to 76.24% ± 0.72%. The percentage of multicenter RCTs decreased from 67% to 31%. The percentage of positive trials also decreased from 80% to 50.5%, as did the mean sample size (212 to 166). Regression analysis indicated that trials with an epidemiologist as the first author and nonsurgical trials were significantly associated (p = 0.001) with a higher overall trial quality score. The categories of the lowest mean methodology scores were randomization and concealment, eligibility criteria, and reasons for patient exclusion, as identified with the Detsky score, and patient and assessor blinding, as identified with the risk-of-bias assessment.

CONCLUSIONS

The quantity and quality of published RCTs in JBJS have increased in the 2001 to 2013 time period compared with the previous time period. Although these improvements are encouraging, trends to smaller, single-center trials were also observed. To efficiently determine the efficacy of orthopaedic treatments and limit bias, high-quality randomized trials of appropriate sample size and rigorous design are needed.

Exploring health professionals' understanding of evidence-based treatment for idiopathic toe walking

BACKGROUND

Idiopathic toe walking (ITW) is an exclusionary diagnosis resulting in a child walking on the balls of their feet. Preferred treatment options may be due to the severity of the toe or the health professional preference There are limited guidelines supporting consistent treatment recommendations for this condition. This research aimed to understand agreement between health professionals' knowledge of evidence for common treatment strategies for ITW and if health professionals supported these strategies being used in clinical practice.

METHODS

An international online survey was opened to registered health professionals who treat children with ITW between July 2017 and March 2018. The survey had two components: (a) demographic variables and variables relating to knowledge of evidence about ITW treatments and (b) support for common treatment strategies. Additional data on strategy use, referrals, and preference were collected. Kappa statistics described intra-rater agreement between evidence knowledge and support. Multivariable regression analyses identified factors associated with the 10 most commonly preferred treatments.

RESULTS

There were 908 international responses. Kappa agreement for paired correct responses determined a fair agreement for evidence support knowledge for four strategies including watch and wait (Kappa = 0.24), stretching (Kappa = 0.30), sensory integration strategies (Kappa = 0.40), and motor control strategies (Kappa = 0.24) and moderate responses for 13 others. No strategies had greater than moderate agreement between correct knowledge of evidence and strategy support. Profession, location, number of children seen in practice, and not correctly identifying the evidence factored into many of the most commonly used strategies for ITW (p < .05).

CONCLUSIONS

The results from this study, which confirm a variety of interventions, are utilized in the management of ITW around the world. Furthermore, there remains a disconnection between paediatric health professionals' understanding of the evidence of common treatment strategies of ITW and a consensus for the treatment of this condition.

Interventions for idiopathic toe walking

BACKGROUND

Idiopathic toe walking (ITW) is an exclusionary diagnosis given to healthy children who persist in walking on their toes after they should typically have achieved a heel-toe gait. The literature discusses conservative and surgical interventions using a variety of treatment modalities. Young children and children without a limitation in ankle dorsiflexion (the upwards movement of the foot towards the shin of the leg) are commonly treated with conservative interventions. Older children who continue toe walking and present with limitations in ankle dorsiflexion are sometimes treated with surgical procedures. This systematic review is needed to evaluate the evidence for any intervention for the treatment of ITW. The conclusions of this review may support decision making by clinicians caring for children with ITW. It may also assist families when deciding on treatment options for their children with ITW. Many of the treatments employed have financial implications for parents or healthcare services. This review also aims to highlight any deficits in the current research base.

OBJECTIVES

To assess the effects of conservative and surgical interventions in children with ITW, specifically effects on gait normalisation, ankle range of motion, pain, frequency of recurrence, and any adverse effects.

SEARCH METHODS

On 29 April 2019, we searched the Cochrane Neuromuscular Specialised Register, CENTRAL, MEDLINE, Embase, CINAHL Plus, and PEDro. We searched the following registers of clinical trials for ongoing and recently completed trials: the World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP, apps.who.int/trialsearch), and ClinicalTrials.gov (clinicaltrials.gov). We searched conference proceedings and other grey literature in the BIOSIS databases and System for Information on Grey Literature in Europe (OpenGrey, opengrey.eu). We searched guidelines via the Turning Research Into Practice database (TRIP, tripdatabase.com) and National Guideline Clearinghouse (guideline.gov). We did not apply language restrictions.

SELECTION CRITERIA

We considered randomised or quasi-randomised trials for inclusion in the review if they involved participants diagnosed with ITW gait in the absence of a medical condition known to cause toe walking, or associated with toe walking. As there is no universally accepted age group for ITW, this review includes ITW at any age, who have been toe walking for more than six months, who can or cannot walk with a heel-toe gait, and who may or may not have limited dorsiflexion of the ankle joint.

DATA COLLECTION AND ANALYSIS

We used standard Cochrane methodological procedures. The primary outcome was improvement in toe walking (defined as greater than 50% of time spent heel-toe walking). Secondary outcomes were active and passive range of motion of the ankle joint, pain, recurrence of ITW after treatment, and adverse events. We assessed the certainty of the evidence using the GRADE framework.

MAIN RESULTS

Four studies, comprising 104 participants, met the inclusion criteria. One study did not report data within the appropriate follow-up timeframe and data from two studies were insufficient for analysis. The single study from which we extracted data had 47 participants and was a randomised, controlled, parallel-group trial conducted in Sweden. It tested the hypothesis that combined treatment with serial casting and botulinum toxin type A (BTX) was more effective than serial casting alone in reducing ITW gait.This study found that more participants treated with BTX improved (defined as toe walking less than 50% of the time, as reported by parents) (risk ratio (RR) 1.21, 95% confidence interval (CI) 0.57 to 2.55; 1 trial, 46 participants; very low-certainty evidence). However, there was little or no difference between groups in passive ankle joint dorsiflexion range of movement on the right with the knee extended (mean difference (MD) -1.48º, 95% CI -4.13 to 1.16; 1 trial, 47 participants), on the right with the knee flexed (MD -0.04º, 95% CI -1.80 to 1.73; 1 trial, 46 participants), on the left with the knee flexed (MD 1.07, 95% CI -1.22 to 3.37), or on the left with the knee extended (MD 0.05, 95% CI -0.91 to 1.91). Nor was there a clear difference between the groups in recurrence of toe-walking gait (assessed via severity of toe walking (graded 1 (mild), 2 (moderate), or 3 (severe)) on gait analysis, analysed as continuous data: MD 0.34 points, 95% CI -0.09 to 0.78; 46 participants). In principle, MDs greater than zero (i.e.) positive values) would favour BTX and casting and negative values would favour casting alone. We have not reported effects as better or worse because all results were from evidence of very low certainty. We downgraded the certainty of evidence because of study limitations (outcome assessment was not blinded) and imprecision. Outcomes of pain and active range of motion were not reported in the included study.In terms of adverse events, calf pain was reported twice in the casting-only group and three times in the BTX group. There were three minor skin problems in each group and one reported case of pain directly after BTX injection. The report did not state if calf pain and skin irritation were from the same or different participants. The study authors reported that adverse events did not alter treatment adherence.

AUTHORS' CONCLUSIONS

The certainty of evidence from one study, which compared serial casting with serial casting with BTX for ITW in children, was too low for conclusions to be drawn. A further three studies reported outcomes relating to BTX, footwear, exercises, and different types of orthoses as interventions, however the outcome data were too limited to assess their effects.

Effect of Plantar Flexor Muscle Strengthening on the Gait of Children With Idiopathic Toe Walking: A Study Protocol

PURPOSE

To evaluate the effect of plantar flexor strengthening associated with conventional physical therapy treatment in participants with idiopathic toe walking.

METHODS

Thirty participants, of both sexes diagnosed with idiopathic toe walking, aged 5 and 11 years, will be recruited and randomized into 2 groups: the control group, who will undergo gait training, triceps surae muscle stretching, anterior tibial muscle strengthening, and motor sensory training, and the intervention group, who will undergo the same training as the control group and, additionally, triceps surae muscle strengthening. The intervention will be performed twice a week for 8 weeks. The participants will undergo a 3-dimensional gait kinematic analysis, passive amplitude of dorsiflexion movement, isometric dynamometry of the anterior tibial and triceps surae muscles, motor coordination, quality of life, and perception of the parents regarding the equinus gait at baseline and at the end of treatment. Quality of life will be reevaluated during a 24-week follow-up.

Outcomes of Noninvasively Treated Idiopathic Toe Walkers

Idiopathic toe walking (ITW) causes a common problem in pediatric orthopaedics. In the literature, numerous treatment options have been reported, but consensus about the management of ITW is still missing. The aim of the current study was to evaluate conservative treatment with pyramidal insoles. A total of 193 patients underwent conservative treatment between January 2010 and June 2013. Mean age at the beginning of the treatment was 7.75 ± 0.23 years (range 2.0-17.0 years). For all patients, demographic data, comorbid diseases, passive range of motion (ROM), persistent toe walking, and performed operations were retrospectively evaluated. Following operative treatment was defined failure. Eight (4.15%) patients underwent Achilles tendon lengthening operation after mean therapy time of 2.72 years (range 0.1-7.0 years), 174 cases were treated successfully (90.16%). In 50 cases, toe walking suspended completely after mean therapy time of 2.83 years. In cases of failure, patients were older at diagnosis and at the beginning of the treatment. Mean passive ROM increased over the time. In cases of failure, ROM decreased from the first to the second examination. Conservative treatment of ITW using pyramidal insoles can be effective. Ankle dorsiflexion significantly improved in the patients who were successfully treated. Therapy should start early. A decrease of ROM under therapy should lead to critical revisal of individual therapy. Levels of Evidence: Therapeutic, level IV: Case series.

Identifying methods for quantifying lower limb changes in children with idiopathic toe walking: A systematic review

BACKGROUND

Idiopathic toe walking (ITW) is a diagnosis of exclusion for children walking on their toes with no medical cause. This systematic review aimed to identify and evaluate the clinical utility, validity and reliability of the outcome measures and tools used to quantify lower limb changes within studies that included children with ITW.

METHODS

The following databases were searched from inception until March 2018: Ovid MEDLINE, EBESCO, Embase, CINAHL Plus, PubMed. Inclusion criteria were studies including children with ITW diagnosis, reporting use of measurement tools or methods describing lower limb characteristics, published in peer-reviewed journals, and in English. The relevant psychometric properties of measurement tools were extracted, and assessed for reported reliability and validity. Included articles were assessed for risk of bias using McMaster quality assessment tool. Results were descriptively synthesized and logistic regression used to determine associations between common assessments.

RESULTS

From 3164 retrieved studies, 37 full texts were screened and 27 full texts included. There were 27 different measurement tools described across joint range of motion measurement, gait analysis, electromyography, accelerometer, strength, neurological or radiology assessment. Interventional studies were more likely to report range of motion and gait analysis outcomes, than observational studies. Alvarez classification tool in conjunction with Vicon motion system appeared the contemporary choice for describing ITW gait. There was no significant association between the use of range of motion and gait analysis outcomes and any other outcome tool or assessment in all studies (p > 0.05).There was limited reliability and validity reporting for many outcome measures.

SIGNIFICANCE

This review highlighted that a consensus statement should be considered to guide clinicians and researchers in the choice of the most important outcome measures for this population. Having a standard set of measures will enable future treatment trials to collect similar measures thus allowing future systematic reviews to compare results.

Long-term gait outcomes following conservative management of idiopathic toe walking

BACKGROUND

Idiopathic toe walking is a diagnosis of exclusion characterized by a persistent toe-toe gait pattern after three years of age. Treatment for toe walking includes physical therapy, orthotics, casting, Botulinum Toxin A injection into gastrocnemius/soleus muscles, and/or surgery; yet, little evidence exists regarding long-term treatment effects.

RESEARCH QUESTION

The objective of this study was to explore the differences in longer-term gait outcomes and severity of idiopathic toe walking between children treated actively with casting or inactively following recommendations for stretching.

METHODS

Forty-three adolescents and young adults (14.3-28.8 years; 21 females, 22 males) who had participated in an idiopathic toe walking classification study as children, returned for repeat physical examination and three-dimensional computerized gait analysis (13.4 years follow-up, range 9.4-17.8 years); 23 participants had received active treatment with casting and ankle foot orthotics ± Botulinum Toxin A injection as children and 20 participants had received inactive treatment with recommended stretching exercises. Gait analysis data were compared retrospectively from baseline to follow-up using analysis of variance; toe walking severity was compared using a Wilcoxin Signed-Rank Sums test.

RESULTS

Ankle angle at initial contact, peak dorsiflexion in stance, and toe walking severity improved significantly in the active treatment group only at follow-up. Significant improvement in peak ankle power and timing of ankle kinematics and kinetics in the gait cycle were found in both groups; however, greater changes occurred in the active treatment group. Both groups showed significantly improved internal plantar flexor moments, whereas knee extension increased in stance and passive ankle dorsiflexion decreased in both groups at follow-up (p = 0.001). Intermittent toe walking was reported in 49% (21/43) of participants at follow-up.

SIGNIFICANCE

The results of this study suggest that improvement in ankle kinematic timing and ankle kinetic gait analysis variables is sustainable, independent of conservative treatment for idiopathic toe walking in childhood.

Idiopathic Toe-Walking: Prevalence and Natural History from Birth to Ten Years of Age

BACKGROUND

Children with idiopathic toe-walking, a common pediatric condition, walk some or all of the time on their toes. This condition often causes parental concern, with repeated medical contacts and a range of interventions including stretching, casts, injection of botulinum toxin A, and surgical procedures. The purpose of this cohort study was to document the natural history of this condition.

METHODS

In a population-based cohort of 1,401 healthy 5.5-year-old Swedish children, we found the prevalence of idiopathic toe-walking to be approximately 5% (63 of 1,401). Of the 63 children who had ever been a toe-walker, 26 still were at the age of 5.5 years and were followed in the current study at 8 and 10 years of age. At the 8-year follow-up, parents were asked by telephone whether their child had received any treatment or diagnosis since the 5.5-year assessment, as well as to what extent (approximately 25%, 50%, 75%, or 100% of the time) the child still walked on the toes. At the visit when the children were 10 years of age, their parents were asked the same questions. All 26 children also underwent a neurological examination and an orthopaedic examination focusing on the lower extremities.

RESULTS

At 8 years of age, 6 of 26 children had ceased toe-walking, and by the age of 10 years, 50 (79%) of the original 63 patients had spontaneously ceased toe-walking. Idiopathic toe-walking did not result in contractures of the triceps surae. One subgroup of children displayed early contracture of the ankle and should thus not be considered idiopathic toe-walkers. Four of the children who still toe-walked at the age of 10 years demonstrated some neurodevelopmental comorbidity.

CONCLUSIONS

By the age of 10 years, 79% of the children who have ever been a toe-walker spontaneously develop a typical gait, without intervention or contractures of the ankle dorsiflexion. The diagnosis of short tendo Achilles should be retained as a separate diagnosis as there is a subset of children with this entity who should be treated early in childhood. Neurodevelopmental comorbidities are common among those who continue to toe-walk.

LEVEL OF EVIDENCE

Prognostic Level I. See Instructions for Authors for a complete description of levels of evidence.

Evidence-based Recommendations for Pediatric Orthopaedic Practice

BACKGROUND

Evidence-based medicine has become the cornerstone to guide clinical practice decision-making. Evidence-based medicine integrates the strongest available evidence with clinical expertise to make decisions about clinical care. The quality of the evidence depends upon the soundness of the study methodology to allow for meaningful interpretation of the clinical results. The purpose of this review is to analyze the methodological design and clinical findings of published pediatric orthopaedic studies to determine their ability to change or influence clinical practice.

METHODS

This is the first in a series of evidence-based reviews in pediatric orthopaedics. The pediatric orthopaedic literature was reviewed for randomized controlled trials (RCTs) published in 2013 to 2014. Two RCTs were selected from the Journal of Bone and Joint Surgery for in depth methodological review and analysis. Methodological reviews were performed by 2 orthopaedic surgeons with advanced research degrees. Following this, 2 clinical experts reviewed the articles to rate the clinical impact or value of each study. Methodological and clinical reviews were compiled, and a final recommendation on impact to change clinical practice was made based on both review components at the consensus of the panel.

RESULTS

The first study reviewed investigated the impact of physical therapy on function following supracondylar humeral fractures in children. The reviewers deemed the superiority study to of sound design, and conclusions appropriate for the methodology used and clinical findings. The results do not compel a recommendation to change clinical practice. The second study investigated the impact of Botulinum Toxin A with casting for the treatment of idiopathic toe-walking in children. Although of relatively sound design, the sample size was too small to appropriately perform some statistical comparisons. No recommendation to change clinical practice could be made.

CONCLUSION

Both RCTs reviewed were superiority studies with a negative result. No recommendation to change clinical practice could be made.

SIGNIFICANCE

Interpretation of superiority studies with nonsignificant findings must be done with caution. The findings of both of these RCTs highlight the need for more noninferiority trials in the pediatric orthopaedic literature in order to appropriately demonstrate no difference between 2 treatment options.

The effect of persistent toe walking on the skeletal development of the pediatric foot and ankle

The aim of this study was to determine whether persistent idiopathic toe walking leads to compensatory skeletal changes in the pediatric foot and ankle. Foot radiographs of children diagnosed with idiopathic toe walking and sex-matched and age-matched controls were retrospectively reviewed. Five blinded providers assessed the foot radiographs for skeletal changes to the ankle. The relationship between each measure and toe-walking status was examined. Providers observed radiographic evidence of skeletal changes of the talus in idiopathic toe walkers compared with controls, suggesting that persistent toe walking impacts the skeletal development of the talus.

LEVEL OF EVIDENCE

prognostic level III.

Reliability and Validity of the 50-ft Walk Test for Idiopathic Toe Walking

PURPOSE

To evaluate interrater reliability and concurrent validity of the 50-ft walk test (FWT) for children with idiopathic toe walking (ITW).

METHODS

Thirty children, 6 to 13 years old, with ITW participated. During the 50-FWT, an accelerometer counted total steps. A physical therapist counted the number of toe-walking steps. The number of toe-walking steps was divided by the total steps to calculate a toe-walking percentage. Interrater reliability was assessed by correlating the toe-walking percentage obtained by 2 raters using an intraclass correlation coefficient. Concurrent validity was evaluated by correlating the toe-walking percentage calculated by the GAITRite and therapist using a Spearman ρ.

RESULTS

There was excellent interrater reliability and concurrent validity. Experience level did not impact the therapist's ability to identify a toe-walking step.

CONCLUSIONS

The 50-FWT demonstrated excellent interrater reliability and concurrent validity. It can be used to obtain a percentage of toe walking in children 6-13 years of age with ITW.

The 3-Step Pyramid Insole Treatment Concept for Idiopathic Toe Walking

The idiopathic toe walking (ITW) gait pattern is characterized in children for walking since the beginning on their first steps on the forefoot; however, these children are able to support their whole foot on the ground. ITW can only be diagnosed in the absence of any orthopaedic or neurological condition known to cause tiptoe walking. The aim of this article is to review other references and provide an outline of the different treatment options, including the 3-step-pyramid insole treatment concept for children with ITW.

METHODS

Fifty-four articles in English, German, and Spanish were reviewed. There were comparative, retrospective or case studies, classifications or literature reviews and they were divided according with these categories. All the literature reviewed was published between 2000 and 2015.

RESULTS

There are some studies that proved the 3-step pyramid insole treatment concept as an effective option compared with other therapeutic modalities such as physical therapy, casting, botolinum toxin type A (BTX), and surgery.

CONCLUSION

There is a wide spectrum regarding the therapeutic options for children with ITW, from physical therapy to surgery options. However, any of these treatment modalities have been reported to be fully successful for the whole toe walking population. Some procedures seem to have achieved faster results or seem to have longer lasting effects. Therefore, further research on the causes of ITW is recommended.

LEVELS OF EVIDENCE

Therapeutic, Level II: Systematic review, prospective, comparative.

Whole-Body Vibration Results in Short-Term Improvement in the Gait of Children With Idiopathic Toe Walking

This study aimed to determine the impact of multiple doses of whole-body vibration on heel strike, spatial and temporal gait parameters, and ankle range of motion of children with idiopathic toe walking. Whole-body vibration was applied for 5 sets of 1 minute vibration/1 minute rest. Gait measures were collected pre intervention, 1, 5, 10, and 20 minutes postintervention with the GaitRite(®) electronic walkway. Ankle range of motion was measured preintervention, immediately postintervention, and 20 minutes postintervention. The mean (SD) age of the 15 children (n = 10 males) was 5.93 (1.83) years. An immediate increase in heel contact (P = .041) and ankle range of motion (P = .001 and P = .016) was observed. These changes were unsustained 20 minutes postvibration (P > .05). The gait improvement from whole-body vibration could potentially be due to a rapid increase in ankle range of motion or a neuromodulation response.

Toe walking: causes, epidemiology, assessment, and treatment

PURPOSE OF REVIEW

The present review includes the most up-to-date literature on the causes, epidemiology, diagnosis, and treatment of toe walking.

RECENT FINDINGS

The prevalence of toe walking at age 5.5 years is 2% in normally developing children, and 41% in children with a neuropsychiatric diagnosis or developmental delays. A recent systematic review concluded that there is good evidence for casting and surgery in the treatment of idiopathic toe walking, with only surgery providing long-term results beyond 1 year. Botox combined with casting does not provide better outcomes compared with casting alone. Ankle-foot-orthoses restrict toe walking when worn, but children revert to equinus gait once the orthosis is removed.

SUMMARY

Toe walking can occur because of an underlying anatomic or neuromuscular condition, but in the majority of cases toe walking is idiopathic, without a discernable underlying cause. For some families, toe walking may simply be a cosmetic concern, whereas in other cases it can cause pain or functional issues. Treatment for toe walking is based on age, underlying cause, and the severity of tendon contracture. Described treatments include casting, chemical denervation, orthotics, physical therapy, and surgical lengthening of the gastroc-soleus-Achilles complex. A careful history, clinical exam, and selective diagnostic testing can be used to differentiate between different types of toe walking and determine the most appropriate treatment for each child.

Long term gait outcomes of surgically treated idiopathic toe walkers

Toe walking is a common gait deviation which in the absence of a known cause is termed idiopathic toe walking. Surgical treatment in the presence of a triceps surae contracture includes tendo-Achilles or gastrocnemius/soleus recession and has been shown to be effective in improving kinematic outcomes at a one year follow up. The purpose of this study was to assess longer term kinematic and kinetic outcomes of children with idiopathic toe walking treated surgically for gastrocnemius/soleus contractures. Eight subjects with a diagnosis of idiopathic toe walking who had surgical lengthening of the gastrocnemius/soleus and had previous motion analysis laboratory studies pre-operative and 1 year post-operative, returned for a motion analysis laboratory study greater than 5 years since surgery. Subjects completed lower extremity physical exam and 3-D computerized kinematics and kinetics. Significant improvements for mean pelvic tilt, peak dorsiflexion in stance and swing, and overall kinematics index at 1 year post-operative were maintained at 5 years post-operative. Kinetic variables of ankle moment and power were improved at 1 year and 5 years post-operative. On physical exam, dorsiflexion with knee extended was tighter from 1 to 5 year follow-up which did not correspond to the functional changes of gait. Idiopathic toe walkers who were treated surgically for triceps surae contractures showed significant improvements in key kinematic and kinetic gait analysis variables at 1 year post-operative that were maintained at 5 years post-operative. Overall, subjects were satisfied with outcomes of the surgery, unrestricted in activities, and reported minimal pain.

Safety and Efficacy of Botulinum Toxin A in Children Undergoing Lower Limb Lengthening and Deformity Correction: Results of a Double-blind, Multicenter, Randomized Controlled Trial

BACKGROUND

Lengthening of the lower limb is a complex procedure in which pain management and complications such as pin-site infections and muscle contractures impact the family and affect the child's quality of life. As a result, the paralytic and antinociceptive actions of neurotoxins may be indicated in managing these complications; however, few studies have explored ways to improve outcomes after lengthenings. The objective of this study was to evaluate the safety and efficacy of botulinum toxin A (BTX-A) in children undergoing lower limb lengthenings and deformity correction.

METHODS

Participants with a congenital or acquired deformity of the lower extremity requiring surgery to one limb were randomized to receiving either BTX-A as a single dose of 10 units per kilogram body weight, or an equivalent volume of saline solution. Pain, medication, quality of life, and physical function were assessed at different time-points. Adverse events were recorded in all participants. T test and χ tests were used to compare potential differences across both groups.

RESULTS

Mean age of the 125 participants was 12.5 years (range, 5 to 21 y), and lengthenings averaged 4.2 cm. Maximum pain scores on day 1 postoperatively were lower in the BTX-A group (P=0.03) than in the placebo group, and remained significant favoring botox when stratifying by location of lengthening (femur vs. tibia). Clinical benefits for BTX-A were found for 3 quality of life domains at mid-distraction and end-distraction. When stratifying according to location of lengthening, there were significantly fewer pin-site infections in the tibia favoring botox (P=0.03). The amount of adverse events and bone healing indices were no different in both groups.

CONCLUSIONS

The clinical differences in quality of life, the lower pain on the first postoperative day, and the lower number of pin-site infections in the tibia favoring BTX-A support its use as an adjunctive treatment to the lengthening process. The detailed analyses of pain patterns help inform families on the pain expectations during lower limb lengthenings. The amount of adverse events were no different in both groups, and bone healing rates were similar, indicating that the use of BTX-A in children undergoing limb lengthening and deformity correction is safe.

LEVEL OF EVIDENCE

Level I.

Fifteen-minute consultation: A child with toe walking

Toe walking is a common developmental phenomenon in young children. It is usually benign and self-limiting. Toe walking can be a presenting sign of some serious underlying disorders and idiopathic toe walking is a diagnosis of exclusion. Persistent toe walking can lead to limited ankle dorsiflexion which may cause functional problems. Specific interventions depend on underlying cause and may range from verbal reinforcement to serial casting and surgery.