An Algorithm for Application of Furlow Palatoplasty to the Treatment of Velocardiofacial Syndrome–Associated Velopharyngeal Insufficiency

What's New in Cleft Palate and Velopharyngeal Dysfunction Management: An Update

LEARNING OBJECTIVES

After studying this article, the participant should be able to: (1) Describe the pathology of velopharyngeal dysfunction (VPD) as it relates to patients with a cleft palate. (2) Use the perceptual speech assessment and objective diagnostic tools to determine the presence or absence of VPD. (3) Describe the surgical options available for the treatment of patients with VPD. (4) Develop an evidence-based, customized treatment plan for VPD founded on objective considerations.

SUMMARY

To treat patients with cleft palate effectively, the surgeon must understand the diagnosis and surgical management of cleft-associated velopharyngeal dysfunction. The authors review diagnostic modalities including perceptual speech assessment, video nasendoscopy, fluoroscopy, magnetic resonance imaging, and nasometry. Surgical treatments including palatal lengthening with buccal myomucosal flaps, conversion Furlow palatoplasty, sphincter pharyngoplasty, and pharyngeal flap are discussed. Selection of an optimal surgical treatment is addressed.

Surgical Management of Submucous Cleft Palate by Radical Muscle Dissection Veloplasty: Speech Outcomes in Patients with 22q11.2 Deletion Syndrome

OBJECTIVE

To evaluate the benefit of anatomical muscle dissection repair for velopharyngeal insufficiency (VPI) in patients with submucous cleft palate (SMCP) with 22q11.2 deletion syndrome.

DESIGN

Retrospective blinded randomised analysis of a surgeon's management over 10 years.

SETTING

The study was performed at a specialised Paediatric hospital in the United Kingdom.

PATIENTS

Children with SMCP and 22q11.2 deletion syndrome.

INTERVENTIONS

All participants underwent radical muscle dissection veloplasty.

OUTCOMES MEASURED

Pre- and post- operative measurements included severity of anatomical defect, speech samples and lateral images which were digitised, randomised then externally and blindly analysed using validated techniques. Stata software was used to perform statistical analysis.

RESULTS

57 children with 22q11.2 deletion syndrome were included in this analysis. Intra-operatively, the majority of cases were identified as SMCP Grade I anomalies. Post-operatively, a statistically significant improvement in hypernasality, resting palate length, palate length at maximum closure, palate excursion and gap size at maximum closure was observed. Secondary surgery was performed for 59% of patients by ten years.

CONCLUSION

Muscle dissection repair improves hypernasality, palate closure function and the closure gap in patients with 22q11.2 deletion syndrome. Although over 50% of patients may require further surgery, muscle dissection repair should be a first step due to its utility at a younger age, when invasive investigations are impossible, its lower morbidity, speech and language benefits or altering the plans for less obstructive secondary surgery when it lead to reduced velo-pharyngeal gap and improved palate mobility even when adequate velo-pharyngeal closure was not achieved.

Adult-onset obstructive sleep apnea and pediatric pharyngoplasty in 22q11.2 deletion syndrome

OBJECTIVE/BACKGROUND

We aimed to evaluate adult-onset obstructive sleep apnea (OSA) and related risk factors, including history of pediatric palatal/pharyngeal surgery to remediate velopharyngeal dysfunction, in 22q11.2 deletion syndrome (22q11.2DS).

PATIENTS/METHODS

Using a retrospective cohort design and standard sleep study-based criteria, we determined presence of adult-onset OSA (age ≥16 years) and relevant variables through comprehensive chart review in a well-characterized cohort of 387 adults with typical 22q11.2 microdeletions (51.4% female, median age 32.3, interquartile range 25.0-42.5, years). We used multivariate logistic regression to identify independent risk factors for OSA.

RESULTS

Of the 73 adults with sleep study data, 39 (53.4%) met criteria for OSA at median age 33.6 (interquartile range 24.0-40.7) years, indicating a minimum OSA prevalence of 10.1% in this 22q11.2DS cohort. History of pediatric pharyngoplasty (odds ratio 2.56, 95% confidence interval 1.15-5.70) was a significant independent predictor of adult-onset OSA, while accounting for other significant independent predictors (asthma, higher body mass index, older age), and for male sex. An estimated 65.5% of those prescribed continuous positive airway pressure therapy were reported as adherent.

CONCLUSIONS

In addition to factors of known importance in the general population, delayed effects of pediatric pharyngoplasty may contribute to risk of adult-onset OSA in individuals with 22q11.2DS. The results support increased index of suspicion for OSA in adults with a 22q11.2 microdeletion. Future research with this and other homogeneous genetic models may help to improve outcomes and to better understand genetic and modifiable risk factors for OSA.

Outcomes of Furlow Double-Opposing Z-Plasty Palatoplasty for the Treatment of Symptomatic Overt and Occult Submucous Cleft Palate: A Comparison Study

BACKGROUND

The submucous cleft palate can be overt or occult and may require surgical repair. The double-opposing Z-plasty (Furlow repair) is the authors' center's preferred approach. This study evaluated complication rates, differences in outcome between overt and occult types, and patient factors associated with surgical failure.

METHODS

This retrospective study reviewed documentation on all patients who underwent Furlow Z-plasty for submucous cleft palate at a single center between 2004 and 2018. Speech pathology was quantified using the Pittsburgh Weighted Speech Score.

RESULTS

A total of 351 patients were included (125 overt and 226 occult cases). Furlow Z-plasty was successful (postoperative Pittsburgh Weighted Speech Score <7 without recommendation for secondary speech surgery) in 291 patients (82.1 percent). Apart from those requiring secondary surgery, there were no documented complications. Occult-type patients were 7.5 years old at palatoplasty with a speech score of 14.1; overt-type patients were 6.5 years old with a score of 15.7. Postoperative speech scores were similar for both groups. Secondary speech surgery patients had a higher preoperative score (16.9 versus 14.2). Age at time of palatoplasty and submucous cleft palate type were not predictive of the need for secondary surgery. Syndromic patients had higher preoperative and postoperative speech scores (15.6 and 7.5, respectively) than nonsyndromic patients (14.3 and 4.3) and needed secondary surgery more often (24.4 percent versus 9.2 percent). V-shaped velar vaulting on preoperative assessment was present in 92 percent of occult-type patients.

CONCLUSIONS

Furlow palatoplasty is a safe and effective means of repairing submucous cleft palate. Patients with the occult type presented later with a lower Pittsburgh Weighted Speech Score. High preoperative speech score and syndromic status were associated with the need for secondary speech surgery. V-shaped velar vaulting is a reliable sign of occult submucous cleft palate.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Risk, II.

Carotid artery mobilization prior to pharyngeal flap inset for patients with 22q11.2 deletion syndrome

The management of velopharyngeal insufficiency (VPI) in patients with 22q11.2 deletion syndrome (22q11DS) poses a significant clinical challenge due to presence of a large velopharyngeal gap and a relatively high rate of internal carotid artery (ICA) medialization. To our knowledge, we are the first group to have successfully managed VPI in a series of seven pediatric patients with 22q11DS with medialized ICAs via a novel surgical technique involving carotid artery mobilization followed by pharyngeal flap insertion. Thus far, we have found this technique to be reliably safe with no significant morbidity and caregivers have reported postoperative improvement in speech, swallowing and nasal regurgitation symptoms. Herein, we provide a detailed description of our novel surgical approach, including an instructional video, for correction of VPI in patients with medialized ICAs, who have previously had limited management options.

A Comparative Study Evaluating Speech Outcomes in Classic versus Occult Submucous Cleft Palate Using a Primary Furlow Palatoplasty Technique

BACKGROUND

No consensus exists on the selection of procedures for the treatment of submucous cleft palate, with scarce reports on long-term outcomes from single-surgeon experience. This study assessed the outcomes of using extended indication criteria of Furlow palatoplasty as the first-line procedure for the management of submucous cleft palate-associated velopharyngeal insufficiency.

METHODS

Consecutive nonsyndromic patients with submucous cleft palate (n = 216) treated by a single surgeon between 1998 and 2018 were reviewed. Furlow palatoplasty was performed in all patients diagnosed with submucous cleft palate-associated velopharyngeal insufficiency, regardless of the age cutoff, number of Calnan triad features, or velopharyngeal gap size and pattern. Postoperative velopharyngeal function outcome (adequate, marginal, or inadequate) and the need for secondary surgery were investigated. Age at surgery, sex, submucous cleft palate type (classic and occult), and presence of complication were evaluated for potential associations with this outcome.

RESULTS

Forty-seven patients aged 8.3 ± 4.6 years with occult submucous cleft palate were significantly (p < 0.001) older than those with the classic type (n = 169; 5.6 ± 3.1 years). Most (p < 0.001) of the included patients [n = 181 (83.8 percent)] achieved adequate postoperative velopharyngeal function outcome. Three patients (1.4 percent) presented surgery-related complications, including bleeding and partial wound disruption. Secondary speech surgery was recommended in 24 patients (11.1 percent). In the bivariate and multivariate analyses, none of the tested variables was found to be associated (all p > 0.05) with the postoperative velopharyngeal function outcome.

CONCLUSION

The extended indication criteria of Furlow palatoplasty provided adequate velopharyngeal insufficiency management with a low complication rate and satisfactory speech outcome.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Risk, III.

Management of velopharyngeal dysfunction in patients with 22q11.2 deletion syndrome: A survey of practice patterns

OBJECTIVE

To determine demographics and practice patterns of surgeons treating velopharyngeal dysfunction (VPD) in patients with 22q11.2 deletion syndrome (22q11.2DS).

METHODS

An anonymous electronic survey study was administered to the surgical membership of the American Cleft Palate-Craniofacial Association and the Society for Ear Nose and Throat Advances in Children. The survey queried surgeon demographics and differences in management practices for submucous cleft palate (SMCP), pharyngoplasty algorithms, and self-reported complications for nonsyndromic versus 22q11.2DS patients.

RESULTS

126 surveys were returned from 9 international regions with the majority from the United States (73%), followed by Western Europe (9.5%) and Canada (7.9%). Plastic surgery was the most common specialty (61.9%), followed by otolaryngology (27.8%). 88.1% reported fellowship training, and 33% completed multiple fellowships. Prior to proceeding with pharyngoplasty in 22q11.2DS patients, surgeons required the following assessments: speech evaluation (79.4%), velopharyngeal imaging (51.6%), cardiac evaluation (50.0%), carotid artery MRI (29.4%), and cervical spine x-rays (11.1%). Nasoendoscopy was the most common modality used for imaging the velopharynx. Overall, providers managed patients with 22q11.2DS similarly to nonsyndromic patients, with several significant exceptions including that they were more likely to perform SMCP repair alone as a first approach in nonsyndromic patients (p = 0.031) and posterior pharyngeal flap without SMCP repair in those with 22q11.2DS (p = 0.017).

CONCLUSIONS

Practice patterns for the management of VPD in patients with 22q11.2DS vary across providers. Further collaborative studies are needed to develop optimal treatment paradigms for VPD in patients with 22q11.2 DS.

Outcomes of Sphincter Pharyngoplasty in the Cleft Population

INTRODUCTION

Sphincter pharyngoplasty (SP) is becoming increasingly popular for correction of velopharyngeal insufficiency (VPI) after cleft palate repair because of high success rate, low incidence of postoperative obstructive sleep apnea (OSA), and ease of revision in case of failure. This study is a meta-analysis of SP outcomes, reasons for failure, and revision strategies.

METHODS

A comprehensive review of the literature on SP outcomes was conducted. Sphincter pharyngoplasty failure was defined as persistent hypernasality, incomplete velopharyngeal port (VP) closure on instrumental evaluation with concomitant VPI, or nonresolving hyponasality and/or OSA persisting >3 months after surgery. Two-tailed paired Student t test was used to compare outcomes between syndromic versus nonsyndromic patients and preoperative versus postoperative OSA rates.

RESULTS

Forty-four publications evaluating 2402 patients were included. Overall SP success rate was 78.4% (77.3% in nonsyndromic vs 84.8% in syndromic patients, P = 0.11). Overall primary revision rate was 17.8% (20% in nonsyndromic vs 15.4% in syndromic patients P = 0.97). Most failures (89.5%) manifested as persistent VPI with continued hypernasality requiring revision, whereas 10.5% of failures manifested as obstructive symptoms and/or severe hyponasality requiring revision. Causal factors of SP failure were the following: large central port (62.8%), dehiscence (15.5%), tight port (12.1%), and low-inset (9.7%). Primary revision success rate was 75.6%. Obstructive sleep apnea rates increased from 5.1% to 18.4% (P = 0.02).

CONCLUSIONS

This study suggests that SP can resolve VPI in 78.4% of patients, which can be increased to 94.7% after one revision. Most failures are technique-dependent; therefore, there could be significant ground for improvement of outcomes.

22q11.2 Deletion: Surgical and Speech Outcomes of Patients With Velopharyngeal Insufficiency Treated With a Superiorly Based Pharyngeal Flap as the Primary Surgery

The most frequent palate diagnoses in patients with chromosome 22q11.2 deletion syndrome are a classic submucous cleft, occult, and velopharyngeal insufficiency without cleft, which generates alterations in speech that require surgery. Surgical protocols are controversial owing to syndrome characteristics that make their handling more complex. Pharyngeal flap pharyngoplasty is effective for this type of patient. The objective of this study is to examine the surgical management of velopharyngeal insufficiency in patients with chromosome 22 deletion, using a pharyngeal flap as the primary surgery. The clinical records of patients with chromosome 22 deletion and velopharyngeal insufficiency between 2015 and 2017 were analyzed retrospectively. Eight patients underwent pharyngeal flap pharyngoplasty as a primary surgery, including 1 with velopharyngeal insufficiency without a cleft, 1 with a classic submucous cleft, and 6 with occult submucous cleft. The pre- and postoperative protocol performed by speech therapists and surgeons included clinical evaluation of the oral cavity; perceptual, video recording, and nasometry speech evaluation; and videonasopharyngoscopy. All perceptual parameters and nasometry results significantly changed. Of the cases, 88% achieved a flap with the expected width and height and complete closure of the velopharyngeal sphincter. One patient required flap revision. Four of the 8 patients achieved normal resonance, and 2 of 8 showed mild hypernasality. Using the pharyngeal flap pharyngoplasty as a primary technique to correct velopharyngeal insufficiency in patients with chromosome 22 deletion provides satisfactory outcomes and decreases the number of surgeries. Preoperative planning must be conducted carefully and needs to be individualized to be successful.

Speech Therapy in Velocardiofacial Syndrome After Palatopharyngeal Pharyngoplasty

Velocardiofacial syndrome (VCFs) is a rare congenital disease with an incidence of 1:4000 to 1:6000. Previous studies have found that the abnormality is associated with 22qDS. As reported at the international VCFs conference held in 2006, >180 phenotypes have been identified with this syndrome. Accordingly, there is a wide range of clinical manifestations including congenital defects of the heart and palate, immune deficiencies, psychiatric illness, and speech, learning, and cognitive disabilities Among all the symptoms above, however, pharyngopalatine dysplasia has been observed in nearly every patient. Patients with VCFs often have velopharyngeal insufficiency, which may cause serious disorders in functional speech, with poor intelligibility, a glottal stop with hypernasality and a pharyngeal fricative, and dropping and weakening of consonants. Most also show defects in language learning. Therefore, specialized speech therapy is essential for patients with VCFs, mainly focused on correction of abnormal pronunciation. Long-term clinical experience has shown that speech therapy is based on 2 components: velopharyngeal function and behavior therapy. Our study focused mainly on establishing a corrective behavior guidance model of pronunciation for patients with VCFs.

Craniofacial syndromes and sleep-related breathing disorders

Children with craniofacial syndromes are at risk of sleep disordered breathing, the most common being obstructive sleep apnea. Midface hypoplasia in children with craniosynostosis and glossoptosis in children with Pierre Robin syndrome are well recognized risk factors, but the etiology is often multifactorial and many children have multilevel airway obstruction. We examine the published evidence and explore the current management strategies in these complex patients. Some treatment modalities are similar to those used in otherwise healthy children such as adenotonsillectomy, positive pressure ventilation and in the refractory cases, tracheostomy. However, there are some distinct approaches such as nasopharyngeal airways, tongue lip adhesion, mandibular distraction osteogenesis in children with Pierre Robin sequence, and midface advancement in children with craniosynostoses. Clinicians should have a low threshold for referral for evaluation of sleep-disordered-breathing in these patients.

Results of Primary Repair of Submucous Cleft Palate with Furlow Palatoplasty in Both Syndromic and Nonsyndromic Children

Objective

We hypothesize that primary repair of submucous cleft palate (SMCP) with Furlow palatoplasty will not lead to significant differences in speech outcomes for syndromic and nonsyndromic children.

Design

Retrospective analysis of patients with primary Furlow repair of SMCP between 2004 and 2012.

Setting

Tertiary care center.

Patients/Participants

Thirty-four patients (15 boys; 44%) satisfied our inclusion criteria: multidisciplinary consensus on diagnosis of SMCP, failed trial of speech-language rehabilitation, at least 4 years old at the time of primary surgery, at least 6 months follow-up with a repeat set of postoperative speech assessments.

Interventions

Primary Furlow palatoplasty for SMCP.

Main Outcome Measures

Primary outcomes were based on postoperative perceptual speech assessments and the need for revision surgery. Secondary outcomes included improvement in nasalance scores, postoperative complications, and change in and time to normalization of velar closing ratios.

Results

Mean age at surgery = 7.7 years. Of the patients, 17 (50%) were syndromic and 11 (32%) had associated hearing loss. Mean follow-up = 48 months. No patients had postoperative complications, such as wound dehiscence or fistula; however, two patients (one syndromic, one nonsyndromic) required secondary procedures. Velar closing ratios for all patients increased ( P < .05) and approached normal at an average of 1.3 years postoperatively.

Conclusions

Although the Furlow palatoplasty can correct anatomic anomalies, it cannot achieve normal perceptual resonance in syndromic patients, possibly because of inherent higher-order deficiencies that affect speech production. Further studies with greater patient numbers are necessary to achieve population statistical significance.

Obstructive sleep apnea syndrome in children with 22q11.2 deletion syndrome after operative intervention for velopharyngeal insufficiency

INTRODUCTION

Surgical treatment of velopharyngeal insufficiency (VPI) in 22q11.2 deletion syndrome is often warranted. In this patient population, VPI is characterized by poor palatal elevation and muscular hypotonia with an intact palate. We hypothesize that 22q11.2 deletion patients are at greater risk of obstructive sleep apnea (OSA) after surgical correction of VPI, due, in part, to their functional hypotonia, large velopharyngeal gap size, and the need to surgically obstruct the velopharynx.

METHODS

We performed a retrospective analysis of patients with 22q11.2 deletion syndrome treated at a tertiary pediatric hospital between the years of 2002 and 2012. The incidence of VPI, need for surgery, post-operative polysomnogram, post-operative VPI assessment, and OSA treatments were evaluated.

RESULTS

Forty-three patients (18 males, 25 females, ages 1-14 years) fitting the inclusion criteria were identified. Twenty-eight patients were evaluated by speech pathology due to hypernasality. Twenty-one patients had insufficient velopharyngeal function and required surgery. Fifteen underwent pharyngeal flap surgery, three underwent sphincter pharyngoplasty, two underwent Furlow palatoplasty, and one underwent combined sphincter pharyngoplasty with Furlow palatoplasty. Of these, eight had post-operative snoring. Six of these underwent polysomnography (five underwent pharyngeal flap surgeries and one underwent sphincter pharyngoplasty). Four patients were found to have OSA based on the results of the polysomnography (average apnea/hypopnea index of 4.9 events/h, median = 5.1, SD = 2.1). Two required continuous positive airway pressure (CPAP) due to moderate OSA.

CONCLUSION

Surgery is often necessary to correct VPI in patients with 22q11.2 deletion syndrome. Monitoring for OSA should be considered after surgical correction of VPI due to a high occurrence in this population. Furthermore, families should be counseled of the risk of OSA after surgery and the potential need for treatment with CPAP.

Velopharyngeal dysfunction

Velopharyngeal dysfunction (VPD) is a generic term which describes a set of disorders resulting in the leakage of air into the nasal passages during speech production. As a result, speech samples can demonstrate hypernasality, nasal emissions, and poor intelligibility. The finding of VPD can be secondary to several causes: anatomic, musculoneuronal, or behavioral/mislearning. To identify the etiology of VPD, patients must undergo a thorough velopharyngeal assessment comprised of perceptual speech evaluation and functional imaging, including video nasendoscopy and speech videofluoroscopy. These studies are then evaluated by a multidisciplinary team of specialists, who can decide on an optimal course for patient management. A treatment plan is developed and may include speech therapy, use of a prosthetic device, and/or surgical intervention. Different surgical options are discussed, including posterior pharyngeal flap, sphincter pharyngoplasty, Furlow palatoplasty, palatal re-repair, and posterior pharyngeal wall augmentation.

Genomic disorders on chromosome 22

PURPOSE OF REVIEW

Chromosome 22, the first human chromosome to be completely sequenced, is prone to genomic alterations. Copy-number variants (CNVs) are common because of an enrichment of low-copy repeat sequences that precipitate a high frequency of nonallelic homologous misalignments and unequal recombination during meiosis. Among these is one of the most common multiple anomaly syndromes in humans and the most common microdeletion syndrome, velocardiofacial syndrome (VCFS), also known as 22q11.2 deletion syndrome and DiGeorge syndrome. This review will focus on the recent literature dealing with both the molecular and clinical aspects of chromosome 22 genomic variations. Although the literature covering this area is expansive, the majority is descriptive or analytical of the problems presented by these genomic disorders, and there is little evidence of translational research including treatment outcomes.

RECENT FINDINGS

With the increased use of microarray analysis in both research and clinical practice, variations in CNVs are becoming elucidated. Genomic analysis continues to characterize genes and gene effect. Research on the COMT gene continues to yield interesting findings, including a possible sex-mediated effect because of its regulatory role with estrogen. There is a small amount of treatment outcome data relevant to neuropsychiatric disorders in VCFS, but based on small samples and short-term follow-up.

SUMMARY

Although hundreds of studies in the past year have focused on genomic disorders of chromosome 22, little progress has been made in the implementation of translational research, even for more common disorders including VCFS.

In search of the optimal surgical treatment for velopharyngeal dysfunction in 22q11.2 deletion syndrome: a systematic review

BACKGROUND

Patients with the 22q11.2 deletion syndrome (22qDS) and velopharyngeal dysfunction (VPD) tend to have residual VPD following surgery. This systematic review seeks to determine whether a particular surgical procedure results in superior speech outcome or less morbidity.

METHODOLOGY/ PRINCIPAL FINDINGS

A combined computerized and hand-search yielded 70 studies, of which 27 were deemed relevant for this review, reporting on a total of 525 patients with 22qDS and VPD undergoing surgery for VPD. All studies were levels 2c or 4 evidence. The methodological quality of these studies was assessed using criteria based on the Cochrane Collaboration's tool for assessing risk of bias. Heterogeneous groups of patients were reported on in the studies. The surgical procedure was often tailored to findings on preoperative imaging. Overall, 50% of patients attained normal resonance, 48% attained normal nasal emissions scores, and 83% had understandable speech postoperatively. However, 5% became hyponasal, 1% had obstructive sleep apnea (OSA), and 17% required further surgery. There were no significant differences in speech outcome between patients who underwent a fat injection, Furlow or intravelar veloplasty, pharyngeal flap pharyngoplasty, Honig pharyngoplasty, or sphincter pharyngoplasty or Hynes procedures. There was a trend that a lower percentage of patients attained normal resonance after a fat injection or palatoplasty than after the more obstructive pharyngoplasties (11-18% versus 44-62%, p = 0.08). Only patients who underwent pharyngeal flaps or sphincter pharyngoplasties incurred OSA, yet this was not statistically significantly more often than after other procedures (p = 0.25). More patients who underwent a palatoplasty needed further surgery than those who underwent a pharyngoplasty (50% versus 7-13%, p = 0.03).

CONCLUSIONS/ SIGNIFICANCE

In the heterogeneous group of patients with 22qDS and VPD, a grade C recommendation can be made to minimize the morbidity of further surgery by choosing to perform a pharyngoplasty directly instead of only a palatoplasty.