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Polarization-resolved transmission matrices of specialty optical fibers.
Rev Sci Instrum
December 2024
OFS Laboratories, 19 Schoolhouse Road, Somerset, New Jersey 08873, USA.
Transmission matrix measurements of multimode fibers are now routinely performed in numerous laboratories, enabling control of the electric field at the distal end of the fiber and paving the way for the potential application to ultrathin medical endoscopes with high resolution. The same concepts are applicable to other areas, such as space division multiplexing, targeted power delivery, fiber laser performance, and the general study of the mode coupling properties of the fiber. However, the process of building an experimental setup and developing the supporting code to measure the fiber's transmission matrix remains challenging and time consuming, with full details on experimental design, data collection, and supporting algorithms spread over multiple papers or lacking in detail.
View Article and Find Full Text PDFFlexible endoscopic treatment of Zenker's diverticulum: a retrospective study in a single center from Turkey.
Clin Endosc
December 2024
Department of Gastroenterology, Ankara Bilkent City Hospital, Ankara, Turkiye.
Article Synopsis
- The study focused on patients with Zenker's diverticulum who were treated using cricopharyngeal myotomy with flexible endoscopic septal division.
- A total of 15 patients underwent this procedure, with a reported clinical success rate of 80%, although 20% experienced a return of symptoms.
- The findings suggest that despite new techniques in endoscopy, traditional cricopharyngeal myotomy is still an effective treatment for this condition.
Endoscopic Screening for Laryngotracheal Complications in Children Following Prolonged Mechanical Ventilation Maintained Through Endotracheal Intubation: A Cross-Sectional Pilot Project.
Ann Otol Rhinol Laryngol
December 2024
Department of Otorhinolaryngology & Head-Neck Surgery, Medical College & Hospital, Kolkata; West Bengal, India.
Background: An endoscopic screening program following successful weaning from prolonged mechanical ventilation maintained through endotracheal tube (ET; ) may be justified to assess the upper (laryngotracheal) airway in children who may not always be symptomatic for intubation-related complications.
Objectives: To evaluate effects of prolonged intubation in children through endoscopic screening of the laryngotracheal airway.
Methods: In this cross-sectional pilot project, children (2 months-12 years) successfully extubated following prolonged intubation were selected, irrespective of having symptoms, for a 1-time flexible nasolaryngoscopy at third to sixth month post-extubation (follow-up window).
Innovative use of the new pulsed-thulium: YAG laser for ureteroscopic lithotripsy: can the "kidney stone calculator" predict lithotripsy duration?
Urolithiasis
December 2024
Groupe de Recherche Clinique sur la Lithiase Urinaire, GRC n°20, Hôpital Tenon, Sorbonne Université, Paris, 75020, France.
To assess the accuracy of Kidney Stone Calculator(KSC), a software designed for surgical planning, in predicting the duration of lithotripsy during flexible ureteroscopy(FURS) when using the novel pulsed-Thulium: YAG(p-Tm: YAG) laser. From February to August 2023, a single-center prospective study was conducted, including patients with kidney or ureteral stones through non-contrast computed tomography(NCCT), who underwent FURS with p-Tm: YAG laser lithotripsy. KSC used three-dimensional segmentation of the stones from NCCT images, along with an interactive user interface for laser settings, to estimate the stone volume(SV) and the lithotripsy duration(LD).
View Article and Find Full Text PDFWe present a case of an infant patient with Robin sequence (Pierre Robin sequence; PRS) who underwent general anesthesia for a glossopexy procedure. Pediatric patients with PRS are prone to upper airway obstruction during general anesthesia induction and intubation difficulties due to micrognathia and glossoptosis. In this case, we facilitated mask ventilation by inserting a nasopharyngeal airway before induction and successfully intubated the patient using a 2-person technique that combined the use of a video laryngoscope and a flexible fiber-optic scope.
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