Type 1 Laryngeal Cleft and feeding and swallowing difficulties in infants and toddlers: A Review

Indication and efficacy of injection laryngoplasty for laryngeal clefts - A retrospective cohort study

PURPOSE

Laryngeal cleft (LC) is an anatomical defect of the larynx, where there is a gap (or cleft) between the arytenoids. Milder types can be treated with injection laryngoplasty (IL), involving injection with a filler, resulting in a decreased depth of the cleft and thereby reducing tracheal penetration or aspiration. The effect, however, is temporary. The aim of this study was to investigate the possible indications and the efficacy of IL for LC.

METHODS

Patients who underwent IL for LC between March 2018 and June 2023 were retrospectively evaluated. The following parameters were studied: incidence of LC symptoms and objective swallowing evaluations before and after IL, the duration of possible symptom improvement, complications, and the number of subsequent suture repairs.

RESULTS

Eighty-five patients were included. Before IL, 81 (96 %) patients had symptoms of aspiration during feeding, compared to 41 (54 %) patients after IL (p ≤ 0.001). In 42 (49 %) patients, temporary symptom relief occurred, in 22 (26 %) patients symptoms persisted, in 16 (19 %) patients symptoms decreased permanently. Mild complications such as cough and desaturations in the direct postoperative period occurred.

CONCLUSION

This study shows a statistically significant decrease in the number of parents/caretakers reporting swallowing symptoms after injection laryngoplasty, and a decrease in the average percentage of parents/caretakers reporting various other symptoms. Based on our results, injection laryngoplasty can be recommended as a diagnostic tool in the treatment of laryngeal cleft. Furthermore, it can be used as bridge therapy (i.e. until patients outgrow their symptoms, or until suture repair).

International perspective of injection laryngoplasty for laryngeal cleft - A survey study

OBJECTIVES

Laryngeal Cleft (LC) is an anatomical defect that can cause swallowing difficulties and subsequent recurrent respiratory symptoms. LC can be treated surgically by performing suture repair or by Injection Laryngoplasty (IL). The indications and efficacy of IL are debated among pediatric otolaryngologists. The aim of this survey study was to review the international perspective on IL for LC.

METHODS

An online survey was conducted to assess international opinions on the indications and efficacy of IL for LC patients. An online survey was sent to 250 pediatric otolaryngologists worldwide. The survey included questions on the management of LC, the physicians' experience with IL, and their use of IL.

RESULTS

Sixty two (25 %) pediatric otolaryngologists, from 47 medical centers, completed the survey. Of the respondents, 38 (62 %) perform IL. The most reported indication was as a diagnostic tool. For the respondents who did not perform IL, the reasons most reported were that the effect is temporary and that there is a need for a second surgery after IL.

CONCLUSION

According to this survey, the perspectives on the use of IL for LC differ among pediatric otolaryngologists, and there is variation in peri-and postoperative standard of care. The respondents' opinions on IL were partly dependent on the intended outcome of its use, i.e., as a permanent treatment or for other indications.

Laryngeal clefts in Prader-Willi syndrome: Feeding difficulties and aspiration not always caused by hypotonia

Feeding difficulties, aspiration, and failure to thrive in infancy are commonly seen in patients with Prader-Willi Syndrome (PWS) and attributed to hypotonia. Patients with PWS and laryngeal clefts were identified by review of medical records at three tertiary care children's hospitals between 2017 and 2022. We present three patients with PWS with feeding difficulties who were also found to have laryngeal clefts which likely contributed to their feeding difficulties. Additional factors such as airway anomalies should be considered in patients with PWS, especially when swallowing dysfunction, dysphagia, or abnormal swallow evaluations are present.

Beyond Laryngeal Clefts: Interarytenoid Injection Augmentation to Predict Success of Suture Augmentation in Children

OBJECTIVE

To assess the efficacy of interarytenoid injection augmentation (IAIA) and the ability of IAIA to predict response to interarytenoid suture augmentation (IASA) based on diet advancement on video fluoroscopic swallow studies (VFSS).

METHODS

Retrospective cohort analysis of patients with persistent pharyngeal dysphagia at a tertiary children's hospital with VFSS pre- and post-IAIA were included between March 2011 and June 2019.

RESULTS

Median age of the 229 patients was 2.2 years (5.8 months-19 years). Interarytenoid mucosal height (IAMH) was found to be above the false vocal folds in 112 patients (53.4%) and at true vocal folds in 10 (4.9%) patients. On VFSS post-IAIA, 95 (41.5%) patients were successfully advanced in recommended diet consistency, 115 (50.2%) were stable, and 19 (8.3%) needed thicker consistency. Paired t-tests on pre- and post-operative consistency scores showed significant improvement, p-value of <0.0001, 95% confidence interval (CI; 0.50-0.85). Poisson regression found no covariates with significant association with improvement on IAIA. For IASA patients, 35/60 (58.3%) improved on post-op VFSS. Paired t-tests on pre- and post-operative consistency scores showed significant improvement, p-value of <0.0001, 95% CI (0.63-1.33). Positive predictive value for IAIA predicting response to IASA was 77% with positive likelihood ratio of 2.3. The response to IAIA versus no response to IAIA likelihood ratios were found to have a statistically significant difference (p < 0.05).

CONCLUSIONS

Our study suggests IAIA yields objective improvement in swallow function on VFSS in nearly half of our patients and may be a reliable diagnostic tool to predict response to IASA in patients with persistent pharyngeal dysphagia with or without a laryngeal cleft.

LEVEL OF EVIDENCE

Level 3 Laryngoscope, 2022.

Injection laryngoplasty for laryngeal cleft type I in an 8-week-old infant

A laryngeal cleft is a rare anatomical deformity which is increasingly treated with injection laryngoplasty. Since diagnosis of laryngeal cleft type I is often made between 2 and 5 years of age, this treatment is rarely performed on very young children. In this case, we describe how injection laryngoplasty is performed safely on an 8-week-old child, and we illustrate its added value for the diagnostic process and for temporary symptom relief.

Optimal timing and technique for endoscopic management of dysphagia in pediatric aerodigestive patients

INTRODUCTION

The best strategy to manage an interarytenoid defect [Type 1 laryngeal cleft (LC-1) or deep interarytenoid groove (DIG)] in pediatric aerodigestive patients with dysphagia remains uncertain. This study compared benefit of interarytenoid augmentation (IAA) to suture repair or clinical observation alone in pediatric patients.

METHODS

A 3-year retrospective, single-center analysis of children with dysphagia undergoing endoscopic airway evaluation was performed. Physician preference guided treatment plan: suture repair with CO2 laser, IAA (carboxy methylcellulose or calcium hydroxyapatite), or observation. Primary outcome was improved post-operative diet. Significance was assumed at p < 0.05.

RESULTS

449 patients underwent diagnostic endoscopy. Mean age (±SD) at procedure was 21 ± 13 months, with nearly one fourth (28 %) of children ≤ 12 months. Eighty (18 %) had either an LC-1 (n = 55) or DIG (n = 25). Of these, 35 (42 %) underwent suture repair, 22 (28 %) IAA, and 23 (30 %) observation only. Aspiration improved overall in the interventional groups compared to observational controls (58 % vs. 9 %, p < 0.05), with no change in benefit observed by age of intervention. IAA was as effective as suture repair (59 % vs 55 %, p = 0.46). In patients with only a DIG, IAA intervention alone significantly improved swallow function (66.6 % vs. 0 %, p < 0.05).

CONCLUSION

In pediatric aerodigestive patients with dysphagia, 18 % of children have an addressable lesion. IAA or suture repair similarly improves dietary advancement. IAA improves swallow function in patients with DIG. These findings support a novel protocol to intervene in dysphagia patients with LC-1 or DIG via IAA at the initial operative evaluation.

Endoscopic Repair of Type 1 Laryngeal Clefts and Deep Interarytenoid Notches: Cold Steel Versus Laser

OBJECTIVES/HYPOTHESIS

Endoscopic repair is the preferred surgical treatment for type 1 laryngeal clefts (T1LCs) and deep interarytenoid notches (DINs). No studies exist showing differences in repair rates using laser and cold steel. Our objective is to assess overall success and revision rate for endoscopic cleft repair and determine whether there is any difference in surgical outcomes between cold steel and laser techniques.

STUDY DESIGN

Retrospective chart review, cohort study.

METHODS

Retrospective review at a quaternary care pediatric hospital. Included all patients who underwent endoscopic repair for T1LCs and DINs between January 2010 and December 2019. Demographics, comorbidities, surgical data, outcomes, and revision status were collected and analyzed. We excluded patients who did not have a follow-up at our institution.

RESULTS

A total of 194 patients were identified, 14 were excluded for lack of follow-up data so 180 were analyzed. Of these, 127 had cold steel repair and 53 had laser repair. There is no significant difference in demographics or comorbidities. In the cold steel group, 4 of 127 (3.1%) had breakdown and in the laser group, 10 of 53 (18.9%) had breakdown. Patients who failed after a cold steel repair tended to break down later (median 12.7 months) when compared to laser repairs (median 2.1 months). Nine of the 10 patients with breakdown after laser repair were noted on initial postoperative evaluation.

CONCLUSIONS

Endoscopic cleft repair is a well-described and effective method for repair of T1LCs and DINs. Both cold steel and laser have high success rates; however, higher failure rates were noted in the laser repair group. Failure after laser repair may occur earlier than failure after cold steel repair. But this did not reach significance.

LEVEL OF EVIDENCE

III Laryngoscope, 2021.

Injection Laryngoplasty for the Treatment of Type 1 Laryngeal Clefts: A Single Institution Experience

OBJECTIVE

Standards for treatment of laryngeal clefts remain poorly defined. There are no large case series that report the efficacy of injection laryngoplasty (IL) in the treatment of pediatric Type 1 laryngeal clefts (LC-1). The objective of this study is to measure the effect of IL in young children with LC-1.

METHODS

A retrospective case series of 130 patients was completed over 3 years at a at a single institution included patients aged 1 month to 8 years, diagnosed with aspiration and penetration issues during swallowing based on a Videofluoroscopic Swallow Study (VFSS). Patients underwent surgical evaluation and intervention using carboxymethylcellulose gel injection. Collected data points included age in months at time of first injection, gender, race, pre- and post-operation VFSS scores, number of injections, co-morbidities and post-operative complications. VFSS scores were evaluated pre- and post-operatively to assess efficacy of intervention. A secondary outcome was efficacy in patients with aspiration compared to those with penetration alone.

RESULTS

This study included 77 male and 53 female patients. Sixty-two patients (48%) demonstrated a significant post-operative improvement in their swallowing function (P < .05). There were no statistical differences in age, number of injections, or the volume of the first injection. Patients that showed a post-operative improvement in swallowing function were on average 5 months older and had more severe aspiration and penetration compared to those who did not demonstrate a post-operative benefit and underwent less injections. The volume of injection did not appear to play a role in the success rate.

CONCLUSION

Injecting the inter-arytenoid area in patients with LC-1 appears to confer some benefit to close to half of our patient population. Successful procedures seemed to occur in patients with more severe aspiration and penetration and older age.