A new ratio based on manometric esophageal length in relation to patient height could offer an objective means of preoperatively identifying shortened esophagus, which could improve surgical planning and outcomes with hiatal hernia repair, according to investigators.
In a retrospective analysis, patients with a lower manometric esophageal length-to-height (MELH) ratio had a higher rate of hiatal hernia recurrence, reported lead author, of the Cleveland Clinic, and colleagues.
A short esophagus increases tension at the gastroesophageal junction, which may necessitate a lengthening procedure in addition to hiatal hernia repair, the investigators wrote in the. As lengthening may require additional expertise, preoperative knowledge of a short esophagus is beneficial; however, until this point, short esophagus could only be identified intraoperatively. Since previous attempts to define short esophagus were confounded by patient height, the investigators devised the MELH ratio to account for this variable.
The investigators evaluated data from 245 patients who underwent hiatal hernia repair by Nissen fundoplication, of whom 157 also underwent esophageal lengthening with a Collis gastroplasty. The decision to perform a Collis gastroplasty was made intraoperatively if a patient did not have at least 2-3 cm of intra-abdominal esophageal length with minimal tension.
For all patients, the MELH ratio was determined by dividing manometric esophageal length by patient height (both in centimeters).
On average, patients who needed a Collis gastroplasty had a shorter esophagus (20.2 vs. 22.4 cm; P less than .001) and a lower MELH ratio (0.12 vs. 0.13; P less than .001).
Multivariable hazard regression showed that regardless of surgical approach, for every 0.01 U-increment increase in MELH ratio, risk of hernia recurrence decreased by 33% (hazard ratio, 0.67; P less than .001). In contrast, regardless of MELH ratio, repair without Collis was associated with a 500% increased risk of recurrence (HR, 6.1; P less than .001). Over 5 years, the benefit of Collis gastroplasty translated to a significantly lower rate of both hernia recurrence (18% vs. 55%; P less than .001) and reoperations for recurrence (0% vs. 10%; P less than .001).
“We suggest that surgeons and gastroenterologists calculate the MELH ratio before repair of a hiatal hernia, and be cognizant of patients with a shortened esophagus,” the investigators concluded. “An esophageal lengthening procedure such as a Collis gastroplasty may reduce the risk of hernia recurrence and reoperation for recurrence, especially for patients with a MELH ratio less than 0.12.”The investigators reported no conflicts of interest.
SOURCE: Lal P et al. J Clin Gastroenterol. 2020 Jan 20. .