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Mayhew et al: Effect of conventional multilevel brachycephalic obstructive airway syndrome surgery on clinical and videofluoroscopic evidence of hiatal herniation and gastroesophageal reflux in dogs
Veterinary Surgery 2, 2023

🔍 Key Findings

  • Owner-reported regurgitation improved after CMS, especially post-eating and during activity (P = .012 and P = .002)
  • No significant improvement in VFSS measures of SHH or GER postoperatively (P > .05 for all comparisons)
  • Laryngeal ventriculectomy and soft palate resection were performed in all dogs, alaplasty in 14/16
  • Aspiration pneumonia occurred in 1 dog immediately post-op and resolved with treatment
  • Post-op esophagoscopy results varied, with persistent esophagitis in some cases
  • Clinical response was variable, with ~25–30% of dogs being “non-responders” based on owner scoring
  • 13/16 dogs showed partial or full clinical improvement, despite no change in objective SHH/GER indicators
  • Final follow-up at median 36.5 months showed some dogs still on medical therapy; one underwent further surgery

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← Articles

Mayhew et al: Effect of conventional multilevel brachycephalic obstructive airway syndrome surgery on clinical and videofluoroscopic evidence of hiatal herniation and gastroesophageal reflux in dogs
Veterinary Surgery 2, 2023

🔍 Key Findings

  • Owner-reported regurgitation improved after CMS, especially post-eating and during activity (P = .012 and P = .002)
  • No significant improvement in VFSS measures of SHH or GER postoperatively (P > .05 for all comparisons)
  • Laryngeal ventriculectomy and soft palate resection were performed in all dogs, alaplasty in 14/16
  • Aspiration pneumonia occurred in 1 dog immediately post-op and resolved with treatment
  • Post-op esophagoscopy results varied, with persistent esophagitis in some cases
  • Clinical response was variable, with ~25–30% of dogs being “non-responders” based on owner scoring
  • 13/16 dogs showed partial or full clinical improvement, despite no change in objective SHH/GER indicators
  • Final follow-up at median 36.5 months showed some dogs still on medical therapy; one underwent further surgery

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Multiple Choice Questions on this study

In Mayhew 2023 et al., on BOAS surgery effects, which surgical procedures were consistently performed in all dogs in the study?

A. Soft palate resection and alarplasty
B. Laryngeal ventriculectomy and nares resection
C. Laryngeal ventriculectomy and soft palate resection
D. Nares resection and tonsillectomy
E. Tonsillectomy and alaplasty

Answer: Laryngeal ventriculectomy and soft palate resection

Explanation: All dogs underwent laryngeal ventriculectomy and soft palate resection; alaplasty was performed in 14/16.
In Mayhew 2023 et al., on BOAS surgery effects, what was a significant clinical benefit observed in owner-reported symptoms post-CMS?

A. Reduced vomiting
B. Improved weight gain
C. Reduced regurgitation after eating and during activity
D. Improved cough resolution
E. Decreased diarrhea

Answer: Reduced regurgitation after eating and during activity

Explanation: Owner-reported regurgitation improved post-CMS, especially related to eating and activity.
In Mayhew 2023 et al., on BOAS surgery effects, what long-term clinical outcome was reported at the median 36.5-month follow-up?

A. All dogs discontinued medication
B. GER was eliminated in all dogs
C. One dog underwent further surgery, some remained on meds
D. All dogs developed aspiration pneumonia
E. All dogs had persistent regurgitation

Answer: One dog underwent further surgery, some remained on meds

Explanation: At final follow-up, some dogs still required medical management and one required additional surgery.
In Mayhew 2023 et al., on BOAS surgery effects, what percentage of dogs were considered “non-responders” based on owner scoring?

A. 5%
B. 15%
C. 25–30%
D. 40%
E. 50%

Answer: 25–30%

Explanation: Approximately 25–30% of dogs had minimal to no improvement based on owner reports.
In Mayhew 2023 et al., on BOAS surgery effects, what was the impact of CMS on videofluoroscopic signs of hiatal herniation and gastroesophageal reflux?

A. Significant improvement in both SHH and GER
B. Improved SHH but not GER
C. No significant improvement in either SHH or GER
D. Worsening of GER but not SHH
E. Complete resolution of SHH in all cases

Answer: No significant improvement in either SHH or GER

Explanation: CMS did not significantly affect objective VFSS findings of SHH or GER (P > .05).

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