Abstract
Background
The functional lumen imaging probe (FLIP) is a novel diagnostic tool that can be used to measure esophagogastric junction (EGJ) distensibility. In this study, we performed intraoperative FLIP measurements during laparoscopic Heller myotomy (LHM) and peroral esophageal myotomy (POEM) for treatment of achalasia and evaluated the relationship between EGJ distensibility and postoperative symptoms.
Methods
Distensibility index (DI) (defined as the minimum cross-sectional area at the EGJ divided by distensive pressure) was measured with FLIP at two time points during LHM and POEM: (1) at baseline after induction of anesthesia, and (2) after operation completion.
Results
Measurements were performed in 20 patients undergoing LHM and 36 undergoing POEM. Both operations resulted in an increase in DI, although this increase was larger with POEM (7 ± 3.1 vs. 5.1 ± 3.4 mm2/mmHg, p < .05). The two patients (both LHM) with the smallest increases in DI (1 and 1.6 mm2/mmHg) both had persistent symptoms postoperatively and, overall, LHM patients with larger increases in DI had lower postoperative Eckardt scores. In the POEM group, there was no correlation between change in DI and symptoms; however, all POEM patients experienced an increase in DI of >3 mm2/mmHg. When all patients were divided into thirds based on final DI, none in the lowest DI group (<6 mm2/mmHg) had symptoms suggestive of reflux (i.e., GerdQ score >7), as compared with 20 % in the middle third (6–9 mm2/mmHg) and 36 % in the highest third (>9 mm2/mmHg). Patients within an “ideal” final DI range (4.5–8.5 mm2/mmHg) had optimal symptomatic outcomes (i.e., Eckardt ≤ 1 and GerdQ ≤ 7) in 88 % of cases, compared with 47 % in those with a final DI above or below that range (p < .05).
Conclusions
Intraoperative EGJ distensibility measurements with FLIP were predictive of postoperative symptomatic outcomes. These results provide initial evidence that FLIP has the potential to act as a useful calibration tool during operations for achalasia.
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Acknowledgments
The authors would like to acknowledge Rowena Martinez, RN, and Colleen Krantz, RN, for their help coordinating the clinical aspects of this study. This work was supported by the National Institute of Diabetes and Digestive and Kidney Diseases Grant R01 DK-079902 (J.E. Pandolfino).
Disclosures
Nathaniel Soper is on the scientific advisory boards of TransEnterix and Miret Surgical, which are unrelated to this study. Ezra Teitelbaum, John Pandolfino, Peter Kahrilas, Lubomyr Boris, Frederic Nicodeme, Zhiyue Lin, and Eric Hungness have no conflicts of interest or financial ties to disclose.
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Teitelbaum, E.N., Soper, N.J., Pandolfino, J.E. et al. Esophagogastric junction distensibility measurements during Heller myotomy and POEM for achalasia predict postoperative symptomatic outcomes. Surg Endosc 29, 522–528 (2015). https://doi.org/10.1007/s00464-014-3733-1
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DOI: https://doi.org/10.1007/s00464-014-3733-1