Surgical Treatment of Velopharyngeal Insufficiency

Velopharyngeal insufficiency (VPI) is a condition where the soft palate and posterior oropharynx fail to close adequately, leading to complications such as abnormal speech, nasal regurgitation and nasal emission. Although there exist many approaches to treating VPI depending on the shape and severity of the insufficiency, this chapter describes the three most frequently used and well-researched techniques: the Furlow Palatoplasty (double-opposing Z-palatoplasty), the creation and placement of a pharyngeal flap, and a sphincter pharyngoplasty. This chapter contains an introduction to VPI causes and treatment, a description of patient assessment methods, step-by-step instructions for the different operative procedures, and the recovery process.

SYSTEMATIC REVIEW AND META-ANALYSIS OF THE PALATAL SURGERIES IN THE TREATMENT OF OBSTRUCTIVE SLEEP APNEA

Background The first description of a patient with obstructive sleep apnea was in ‘The Posthumous Papers of the Pickwick Club’ published by English writer Charles Dickens in 18361. The first introduction of the terms ‘sleep apnea syndrome’ and ‘obstructive sleep apnea syndrome’ was by Guilleminault et al in 1967. Subsequently, Guilleminault coined the term ‘upper airway resistance syndrome’ in 19932. Objectives This paper aims to examine published articles between January 2008 and January 2019 on the different palatal surgeries performed on OSA patients and the treatment outcomes, which in turn will be used to determine two things. The first being the effectiveness of various palatal surgical techniques in treating OSAS and the second (if applicable) the most effective of the palatal surgical techniques in treating OSAS. Patients and Methods The current review followed the guidelines of preferred reporting items for systematic reviews and meta-analysis statement 2009 (PRISMA)5. The detailed steps of methods were described elsewhere as well as PRISMA checklist. The quality of relevant studies was assessed using NIH quality assessment tool for observational cohort and cross -sectional studies as well as NIH tool for quality assessment for case series studies. Results Meta-analyses of relevant studies showed that the surgical technique that achieved the best reduction on AHI was the lateral pharyngoplasty followed by the Anterior Palatoplasty, with a significant mean reduction of [(SMD= -0.848, 95% CI (-1.209 – -0.487), p-value<0.001) and (SMD= -0.864, 95% CI (-1.234 – -0.494), p-value<0.001), respectively]. The technique responsible for the best improvement in ESS was the Relocation Pharyngoplasty, with a significant mean reduction of [SMD= -0.998, 95% CI (-1.253 – -0.743), p-value<0.001]. Minimal O2 saturation level improved most with the Expansion Sphincter Pharyngoplasty, with a significant mean reduction of [SMD= 1.011, 95% CI (0.581 – 1.440), p-value<0.001]. The surgical procedure that result in the best post-operative VAS was Z-Palatoplasty, with a significant mean reduction of [SMD= -1. 551, 95% CI (-2.049 – -1.052), p-value<0.001]. soft palate length change with a significant mean reduction of [SMD= -2.219, 95% CI (-2.730 – 1.708), p-value<0.001]. Finally, meta-analyses of relevant studies showed that expansion sphincter pharyngoplasty achieved the overall highest success rate [Event rate= 77%, 95% CI (65.4%– 85.5%), p-value<0.001] Conclusion The best procedure for treating OSA varies from patient to patient and there is no universal cure-all. Careful patient selection and pre-operative evaluation are mandatory.

Utilization of 3D MRI for the Evaluation of Sphincter Pharyngoplasty Insertion Site in Patients With Velopharyngeal Dysfunction

Sphincter pharyngoplasty is a surgical method to treat velopharyngeal dysfunction. However, surgical failure is often noted and postoperative assessment frequently reveals low-set pharyngoplasties. Past studies have not quantified pharyngoplasty tissue changes that occur postoperatively and gaps remain related to the patient-specific variables that influence postoperative change. The purpose of this study was to utilize advanced three-dimensional imaging and volumetric magnetic resonance imaging (MRI) data to visualize and quantify pharyngoplasty insertion site and postsurgical tissue changes over time. A prospective, repeated measures design was used for the assessment of craniometric and velopharyngeal variables postsurgically. Imaging was completed across two postoperative time points. Tissue migration, pharyngoplasty dimensions, and predictors of change were analyzed across imaging time points. Significant differences were present between the initial location of pharyngoplasty tissue and the pharyngoplasty location 2 to 4 months postoperatively. The average postoperative inferior movement of pharyngoplasty tissue was 6.82 mm, although notable variability was present across participants. The pharyngoplasty volume decreased by 30%, on average. Inferior migration of the pharyngoplasty tissue was present in all patients. Gravity, scar contracture, and patient-specific variables likely interact, impacting final postoperative pharyngoplasty location. The use of advanced imaging modalities, such as 3D MRI, allows for the quantification and visualization of tissue change. There is a need for continued identification of patient-specific factors that may impact the amount of inferior tissue migration and scar contracture postoperatively.

Use of a buccinator myomucosal flap and bilateral pedicled buccal fat pad transfer in wide palatal fistula repair: a case report

Primary palatoplasty for cleft palate places patients at high risk for scarring, altered vascularity, and persistent tension. Palatal fistulas are a challenging complication of primary palatoplasty that typically form around the hard palate–soft palate junction. Repairing palatal fistulas, particularly wide fistulas, is extremely difficult because there are not many choices for closure. However, a few techniques are commonly used to close the remaining fistula after primary palatoplasty. Herein, we report the revision of a palatal fistula using a pedicled buccal fat pad and palatal lengthening with a buccinator myomucosal flap and sphincter pharyngoplasty to treat a patient with a wide palatal fistula. Tension-free closure of the palatal fistula was achieved, as well as velopharyngeal insufficiency (VPI) correction. This surgical method enhanced healing, minimized palatal contracture and shortening, and reduced the risk of infection. The palate healed with mucosalization at 2 weeks, and no complications were noted after 4 years of follow-up. Therefore, these flaps should be considered as an option for closure of large oronasal fistulas and VPI correction in young patients with wide palatal defects and VPI.

Impact of Surgery for Velopharyngeal Insufficiency on Eustachian Tube Function in Children: Pharyngeal Flap Versus Sphincter Pharyngoplasty

Objective: Velopharyngeal insufficiency (VPI) is a common speech disorder in patients with a history of cleft palate (CP) or 22q11.2 deletion syndrome. Pharyngeal flap (PF) and sphincter pharyngoplasty (SP) are 2 common surgeries to treat this disorder by decreasing unwanted nasal air emission and hypernasal resonance. Because Eustachian tube dysfunction (ETD) in patients with CP may be more frequent after surgery for VPI, we examined whether ETD was associated with either type of surgery. Design: Retrospective cohort study. Setting: Children’s hospital-based tertiary referral center. Patients: A total of 225 children with VPI who underwent primary PF (201) or SP (24) between 2006 and 2017. Outcome measures: We examined differences in risk of ETD according to both surgical groups and proxies for postoperative nasal obstruction. These proxies included postoperative resonance measures and development of obstructive sleep apnea (OSA). Results: Both surgical groups had similar preoperative measures, except the PF group had higher hypernasality by PSA. Postoperatively, the PF group demonstrated lower hypernasal resonance by nasometry and PSA. There were no differences between PF and SP groups with regard to ETD. Proxies for postoperative nasal obstruction also were not predictive of postoperative ETD. Degree of CP and younger age were found to be risk factors for ETD. Conclusion: There was no significant difference in the effects of PF and SP on ETD in this study. Neither lower hypernasality nor incidence of OSA had any impact on ETD. Degree of CP and younger age were the only significant risk factors for ETD that this study identified.