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Home > Vol 36, No 1 (2018) > Tintara

Evaluation of a Novel Fluid Monitoring Device for Hysteroscopic Surgery

Hatern Tintara, Kanadit Chetpattananondh, Hordia Binyara

Abstract

Objective: To evaluate the performance of a simplified fluid monitoring device for monitoring fluid deficit and uterine perforation during hysteroscopic surgery.
Material and Method: A novel fluid deficit monitoring device was developed using a weighing system operated by a microcontroller. The deficit volume in milliliters (mL) is continuously monitored with an updated display every 30 seconds. The deficit LED is preset to begin flashing with an alarm sound if a fluid deficit reaches 750 mL, 1,000 mL, and 2,500 mL. A new algorithm for detection of small uterine perforations was also developed. The device can be loaded with a maximum of four bottles of 1 liter distention media and has two 2 liters collecting canisters. After having passed laboratory testing, the prototype was clinically used in hysteroscopic surgeries.
Results: The laboratory testing showed a precision of ±7 mL at 500 mL, with an accuracy of ±8.9% for deficit volume measurement with 100% alarm at the preset levels. The perforation alarm could detect a small uterine perforation with 80.0% accuracy in an average (±standard deviation; S.D.) latency time of 3.2±0.2 minutes with an average (±S.D.) fluid leakage of 472±35 mL. The device performed well in a preliminary series of 42 hysteroscopic surgery cases from October 2014 to February 2016. Deficit-volume detection by the device correlated well with clinical evaluations by operating room personnel (r=0.840, p-value<0.001).
Conclusion: The newly developed fluid monitoring device can provide acceptable precision and accuracy for monitoring fluid deficits and detection of small uterine perforations during hysteroscopic surgery.

 Keywords

fluid balance, fluid management, fluid monitoring, hysteroscopic surgery, uterine perforation

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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About The Authors

Hatern Tintara
Department of Obstetrics and Gynecology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Thailand

Kanadit Chetpattananondh
Department of Electrical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Thailand

Hordia Binyara
Songklanagarind Hospital, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Thailand

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