The yield and safety of string capsule endoscopy in patients with dysphagia.
BACKGROUND
Dysphagia is a contraindication for the use of conventional capsule endoscopy (CE). Because string CE (SCE) allows for the immediate retrieval of the device, it eliminates the risk of capsule retention.


OBJECTIVE
To assess the yield and safety of SCE in patients with dysphagia.


METHODS
Comparative study of SCE and EGD.


METHODS
Phoenix Veteran Affairs Medical Center.


METHODS
Patients with dysphagia underwent SCE and EGD.


RESULTS
In 40 patients with dysphagia, the EGD findings were normal in 13 (32.5%); Schatzki's ring in 10 (25%); esophageal tumors in 9 (22.5%), with 1 of these having 2 separate and distinct malignancies; erosive esophagitis in 4 (10%); strictures in 2 (5%); and a web and large esophageal varices in 1 patient each (2.5%). The sensitivity of SCE for diagnosing anatomic pathology as the likely cause of dysphagia was 92.9%, with a specificity of 92.3%, a positive predictive value of 96.3%, and negative predictive value of 85.7%. The overall agreement between SCE and EGD was 92.7% and the kappa index was 0.83. There were no complications with either procedure. There was no case of capsule retention. The SCE recording time was 385.8 seconds; 77.5% patients preferred SCE to EGD.


CONCLUSIONS
(1) SCE was safe, well tolerated, and accurate for the diagnosis of pathology responsible for dysphagia; (2) SCE was preferred to EGD by more than three fourths of patients; (3) SCE can be safely performed in patients with dysphagia.
Gilani
Nooman
N
Gastroenterology Section, Department of Medicine, Carl T. Hayden Veterans Affairs Medical Center, Phoenix, Arizona 85012, USA.
Stipho
Sally
S
Shaukat
Masud S
MS
Akins
Rodney
R
Ramirez
Francisco C
FC
D002214:Capsules; D003680:Deglutition Disorders / Q000175:diagnosis*; D004867:Equipment Design; D004932:Esophageal and Gastric Varices / Q000145:classification / Q000175:diagnosis*; D004945:Esophagoscopy / Q000379:methods*; D004947:Esophagus / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012449:Safety; D012680:Sensitivity and Specificity
D002214:Capsules