An<i>Ex Vivo</i>Model to Evaluate the Effect of Cyclical Adductory Forces on Maintenance of Arytenoid Abduction After Prosthetic Laryngoplasty Performed With and Without Mechanical Arytenoid Abduction

McClellan, Nathaniel R.; Santschi, Elizabeth M.; Hurcombe, Samuel D.A.; Litsky, Alan S.

doi:10.1111/j.1532-950x.2014.12178.x

Cited by 5 publications

(8 citation statements)

References 30 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is exacerbated most during exercise due to the high negative pressures present within the upper respiratory tract 3,4 . The condition is variable in prevalence among breeds with prior studies reporting 10% of thoroughbreds and up to 40% of draft horses affected 5–7 …”

Section: Introductionmentioning

confidence: 99%

“…3,4 The condition is variable in prevalence among breeds with prior studies reporting 10% of thoroughbreds and up to 40% of draft horses affected. [5][6][7] Dynamic or exercising laryngeal function is evaluated using the Rakestraw grading system. 8 Horses with exercising Rakestraw grade A and most with grade B are not generally considered candidates for a laryngoplasty surgery.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of unilateral and bilateral vocal cordectomy on airflow across cadaveric equine larynges at different Rakestraw grades of arytenoid abduction

2022

View full text Add to dashboard Cite

ObjectiveTo assess the effect of vocal cordectomy on airflow across equine larynges at different Rakestraw grades of arytenoid abduction using a unidirectional airflow model.Study designEx vivo, repeated measures.Sample populationTwenty cadaveric equine larynges.MethodsThe right arytenoid cartilage was maximally abducted in all larynges. Each larynx was assigned a Rakestraw grade A or B, and the left arytenoid was abducted accordingly. Each larynx was tested under 3 conditions: intact, left vocal cordectomy (LVC), and bilateral vocal cordectomy (BVC). Translaryngeal pressure and airflow were measured, and digital video footage was obtained. Translaryngeal impedance (TLI) was calculated, and the arytenoid left‐to‐right quotient angle (LRQ) and rima glottis cross‐sectional area (CSA) were measured from standardized still images.ResultsVocal cordectomy reduced TLI by 14.5% in LVC in comparison with intact larynges at Rakestraw grade B (P = .014). In Rakestraw grade A position, neither unilateral nor bilateral vocal cordectomy had any effect on TLI. Regardless of Rakestraw allocation, both LVC and BVC increased CSA in comparison with intact larynges (P < .005), with BVC larynges experiencing a greater effect than LVC (P < .0001).ConclusionUsing a unilateral airflow model, LVC improved TLI in larynges where arytenoid position approximated Rakestraw grade B. However, when the arytenoid position approximated Rakestraw grade A, there was no effect on TLI following LVC or BVC.Clinical significanceSurgeons considering a vocal cordectomy should take into account the degree of arytenoid abduction before performing the procedure, as it may not be warranted from a TLI point of view.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of unilateral and bilateral vocal cordectomy on airflow across cadaveric equine larynges at different Rakestraw grades of arytenoid abduction

2022

View full text Add to dashboard Cite

show abstract

“…Research efforts have focused on improving biomechanical testing techniques, including recent cyclical testing, to identify components of the laryngoplasty construct that could stabilize the degree of rima glottis abduction . In parallel, multiple techniques for laryngeal prosthesis have been developed to reduce suture/cartilage failure .…”

Section: Introductionmentioning

confidence: 99%

“…Another line of research deals with methods of anchoring the prosthesis to the muscular process, relying mainly on single cycle to failure models . Among those, predrilling a hole prior to placing a trocar needle seemed to offer no biomechanical advantage over direct suture placement . More recently, single screw fixation (Corkscrew device, Arthrex, Naples, Florida) resulted in more stable constructs in cyclical testing than double or single loops .…”

Section: Introductionmentioning

confidence: 99%

“…In the same study, the strongest construct in single cycle to failure consisted of a double loop, whereas the weakest included a single loop, screw fixation displaying intermediate properties. The last field of research focuses the influence of prosthetic materials and implantation techniques, on arytenoid abduction, as measured by cross‐sectional area and or left to right quotient angle ratio (LRQ) …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In vitro comparison of 3 techniques of prosthesis attachment to the muscular process of the equine arytenoid cartilage

et al. 2017

View full text Add to dashboard Cite

show abstract

The impact of grade of laryngeal function immediately prior to laryngoplasty and ipsilateral ventriculocordectomy on postoperative performance: 623 Thoroughbred racehorses (1998‐2013)

Broyles

Embertson

Woodie

et al. 2021

Equine Veterinary Journal

View full text Add to dashboard Cite

Background There is persistent concern among some trainers, owners and veterinarians regarding the effect of preoperative laryngeal function grade on the outcome of laryngoplasty and ventriculocordectomy (LPVC). Objectives To determine the effect of laryngeal function grade prior to LPVC on postoperative performance. Study design Retrospective case‐series. Methods Medical and race records of Thoroughbred racehorses diagnosed with recurrent laryngeal neuropathy (RLN) and treated with LPVC between 1998 and 2013 were reviewed. Horses were placed into three groups based on preoperative laryngeal function grade (grade III.1, grades III.2/III.3, and grade IV). The effect of preoperative laryngeal function grade on postoperative performance was determined by multivariable logistic regression, Cox proportional hazard model and multivariable linear regression analysis. Results In a multivariable logistic regression, grade III.2/III.3 horses had 1.88 times higher odds (95% CI = 1.03‐3.43) of racing after LPVC than grade IV (P = .04). A multivariable Cox's proportional hazard analysis controlling for race prior to surgery (P < .01) showed that likelihood of racing postoperatively was not different between grade III.1 and grade IV (P = .6), and although not statistically significant, there was a tendency for grades III.2/III.3 to be more likely to race postoperatively than horses with grade IV (P = .07). Kaplan–Meier survival analysis showed that grade IV horses took a longer time to race compared with grade III.1 and grade III.2/III.3. Laryngeal function grade did not influence the mean earnings per start. Main limitations The small number of horses in the grade III.1 group compared with the III.2/III.3 and IV groups influenced the effect of grade III.1 on outcome. Conclusions Laryngeal function grade may affect likelihood of racing after LPVC, but not earnings per start. Grade III. 2/III.3 horses were more likely to race postoperatively than grade IV horses, and grade IV horses took a longer time to first race after LPVC.

show abstract

AnEx VivoModel to Evaluate the Effect of Cyclical Adductory Forces on Maintenance of Arytenoid Abduction After Prosthetic Laryngoplasty Performed With and Without Mechanical Arytenoid Abduction

Abstract: Ex vivo cyclical adductory forces produced a significant loss of laryngoplasty abduction. The use of a clamp to abduct the arytenoid cartilage before knot tying did not reduce the loss of abduction.

Cited by 5 publications

References 30 publications

Influence of unilateral and bilateral vocal cordectomy on airflow across cadaveric equine larynges at different Rakestraw grades of arytenoid abduction

Influence of unilateral and bilateral vocal cordectomy on airflow across cadaveric equine larynges at different Rakestraw grades of arytenoid abduction

In vitro comparison of 3 techniques of prosthesis attachment to the muscular process of the equine arytenoid cartilage

The impact of grade of laryngeal function immediately prior to laryngoplasty and ipsilateral ventriculocordectomy on postoperative performance: 623 Thoroughbred racehorses (1998‐2013)

Contact Info

Product

Resources

About