Guillermo Plaza

Dr. Guillermo Plaza

orcid

Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 November 2020 in JMIR mHealth and uHealth
Verified
Journal Article
Open access
Carlos O'Connor-ReinaCarlos O'Connor-Reina
Carlos O'Connor-Reina
JGJose Maria Ignacio Garcia
Jose Maria Ignacio Garcia
ERElisa Rodriguez Ruiz
Elisa Rodriguez Ruiz
MDMaria Del Carmen Morillo Dominguez
Maria Del Carmen Morillo Dominguez
VBVictoria Ignacio Barrios
Victoria Ignacio Barrios
GPGuillermo Plaza
Guillermo Plaza
Background: Myofunctional therapy has demonstrated efficacy in treating sleep-disordered breathing. We assessed the clinical use of a new mobile health (mHealth) app that uses a smartphone to teach patients with severe obstructive sleep apnea–hypopnea syndrome (OSAHS) to perform oropharyngeal exercises. Objective: We conducted a pilot randomized trial to evaluate the effects of the app in patients with severe OSAHS. Methods: Forty patients with severe OSAHS (apnea–hypoxia index [AHI]>30) were enrolled prospectively and randomized into an intervention group that used the app for 90 sessions or a control group. Anthropometric measures, Epworth Sleepiness Scale (0-24), Pittsburgh Sleep Quality Index (0-21), Iowa Oral Performance Instrument (IOPI) scores, and oxygen desaturation index were measured before and after the intervention. Results: After the intervention, 28 patients remained. No significant changes were observed in the control group; however, the intervention group showed significant improvements in most metrics. AHI decreased by 53.4% from 44.7 (range 33.8-55.6) to 20.88 (14.02-27.7) events/hour (P<.001). The oxygen desaturation index decreased by 46.5% from 36.31 (27.19-43.43) to 19.4 (12.9-25.98) events/hour (P=.003). The IOPI maximum tongue score increased from 39.83 (35.32-45.2) to 59.06 (54.74-64.00) kPa (P<.001), and the IOPI maximum lip score increased from 27.89 (24.16-32.47) to 44.11 (39.5-48.8) kPa (P<.001). The AHI correlated significantly with IOPI tongue and lip improvements (Pearson correlation coefficient −0.56 and −0.46, respectively; both P<.001). The Epworth Sleepiness Scale score decreased from 10.33 (8.71-12.24) to 5.37 (3.45-7.28) in the app group (P<.001), but the Pittsburgh Sleep Quality Index did not change significantly. Conclusions: Orofacial exercises performed using an mHealth app reduced OSAHS severity and symptoms, and represent a promising treatment for OSAHS. Trial Registration: Spanish Registry of Clinical Studies AWGAPN-2019-01, ClinicalTrials.gov NCT04438785; https://clinicaltrials.gov/ct2/show/NCT04438785

1 July 2007 in Otolaryngology–Head and Neck Surgery
Verified
Journal Article
Closed access
GPGuillermo Plaza
Guillermo Plaza
CHCarlos Herráiz
Carlos Herráiz

1 May 2007 in Ophthalmic Plastic & Reconstructive Surgery
Verified
Journal Article
Closed access
GPGuillermo Plaza
Guillermo Plaza
FBFernando Beteré
Fernando Beteré
ANAraceli Nogueira
Araceli Nogueira
Purpose: To evaluate the effectiveness of transcanalicular dacryocystorhinostomy with diode laser in treatment of epiphora in adults. Methods: A prospective, noncomparative, interventional case series of transcanalicular dacryocystorhinostomy in 25 patients presenting with epiphora due to nasolacrimal obstruction. Patient age ranged from 32 to 72 years. Patients were evaluated postoperatively at 12, 24, and 36 months. Patients were evaluated for symptom improvement through a visual analog scale, and patency of osteotomy by lacrimal system irrigation with fluorescein and direct visualization by nasal endoscopy. Success was defined as resolution of epiphora. Results: Transcanalicular dacryocystorhinostomy was able to re-establish patency of the lacrimal system in 88% of cases after 36 months of surgery. No differences were found between patients older than 65 years and younger patients (chi-square, p > 0.05). Early (12 months) and late (36 months) results were similar (chi-square, p > 0.05). Conclusions: In this prospective series, transcanalicular dacryocystorhinostomy was effective in treatment of epiphora in adults with little morbidity.

30 April 2011 in Acta Otorrinolaringológica Española
Verified
Journal Article
Closed access
GPGuillermo Plaza
Guillermo Plaza
EDEnrique Durio
Enrique Durio
CHCarlos Herráiz
Carlos Herráiz
TRTeresa Rivera
Teresa Rivera
JBJosé Ramón García Berrocal
José Ramón García Berrocal

9 December 2021 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
Carlos O'Connor-ReinaCarlos O'Connor-Reina
Carlos O'Connor-Reina
JGJose Maria Ignacio Garcia
Jose Maria Ignacio Garcia
LALaura Rodriguez Alcala
Laura Rodriguez Alcala
ERElisa Rodríguez Ruiz
Elisa Rodríguez Ruiz
M-Maria-Teresa García -Iriarte
Maria-Teresa García -Iriarte
GPGuillermo Plaza
Guillermo Plaza
Myofunctional therapy (MT) is used to treat sleep-disordered breathing. However, MT has low adherence—only ~10% in most studies. We describe our experiences with MT delivered through a mobile health app named Airway Gym®, which is used by patients who have rejected continuous positive airway pressure and other therapies. We compared ear, nose, and throat examination findings, Friedman stage, tongue-tie presence, tongue strength measured using the Iowa oral performance instrument (IOPI), and full polysomnography before and after the 3 months of therapy. Participants were taught how to perform the exercises using the app at the start. Telemedicine allowed physicians to record adherence to and accuracy of the exercise performance. Fifty-four patients were enrolled; 35 (64.8%) were adherent and performed exercises for 15 min/day on five days/week. We found significant changes (p < 0.05) in the apnoea–hypopnoea index (AHI; 32.97 ± 1.8 to 21.9 ± 14.5 events/h); IOPI score (44.4 ± 11.08 to 49.66 ± 10.2); and minimum O2 saturation (80.91% ± 6.1% to 85.09% ± 5.3%). IOPI scores correlated significantly with AHI after the therapy (Pearson r = 0.4; p = 0.01). The 19 patients who did not adhere to the protocol showed no changes. MT based on telemedicine had good adherence, and its effect on AHI correlated with IOPI and improvement in tongue-tie.

4 February 2022 in Brazilian Journal of Otorhinolaryngology
Verified
Journal Article
Open access
Peter Michael Baptista JardinPeter Michael Baptista Jardin
Peter Michael Baptista Jardin
FMFabricio Martin
Fabricio Martin
HRHarry Ross
Harry Ross
Carlos O'Connor-ReinaCarlos O'Connor-Reina
Carlos O'Connor-Reina
GPGuillermo Plaza
Guillermo Plaza
Manuele CasaleManuele Casale
Manuele Casale
Sleep is fundamental for both health and wellness. The advent of “on a chip” and “smartphone” technologies have created an explosion of inexpensive, at-home applications and devices specifically addressing sleep health and sleep disordered breathing. Sleep-related smartphone Applications and devices are offering diagnosis, management, and treatment of a variety of sleep disorders, mainly obstructive sleep apnea. New technology requires both a learning curve and a review of reliability. Our objective was to evaluate which app have scientific publications as well as their potential to help in the diagnosis, management, and follow-up of sleep disordered breathing. We search for relevant sleep apnea related apps on both the Google Play Store and the Apple App Store. In addition, an exhaustive literature search was carried out in MEDLINE, EMBase, web of science and Scopus for works of apps or devices that have published in the scientific literature and have been used in a clinical setting for diagnosis or treatment of sleep disordered breathing performing a systematic review. We found 10 smartphone apps that met the inclusion criteria. The development of these apps and devices has a great future, but today are not as accurate as other traditional options. This new technology offers accessible, inexpensive, and continuous at home data monitoring of obstructive sleep apnea, but still does not count with proper testing and their validation may be unreliable.