Evaluation of masticatory performance by motion capture analysis of jaw movement.

BACKGROUND: The assessment of masticatory performance (MP) is conducted in hospitals, but is difficult to perform in nursing facilities that lack specialists in dysphagia. To select the appropriate food textures in nursing practice, a simple method of evaluating the MP should be developed. OBJECTIVE: The purpose of this study was to investigate motion parameters that influence MP by motion capture analysis of maxillofacial movement on chewing gummy jelly in healthy adults. METHODS: The subjects were 50 healthy adults. The state of chewing gummy jelly was photographed using a high-speed camera. Simultaneously, we evaluated the amount of glucose extracted (AGE) obtained with gummy jelly as a reference value for MP. The subjects were divided into two groups: normal and low masticatory groups (NG and LG, respectively) based on the AGE. The cycle of mastication was classified into three phases: closing phase (CP), transition phase (TP) and opening phase (OP) through motion capture analysis of the video photographed. Parameters of jaw movement and their associations with the AGE were examined. RESULTS: The transition phase rate (TR) and opening phase rate (OR) were correlated with the AGE. Furthermore, the TR in the NG was significantly higher than in the LG, whereas the OR was significantly lower than in the LG. The age, TR and opening velocity were significant independent variables. CONCLUSION: Motion capture technology facilitated the analysis of jaw movement. The results suggested that MP can be evaluated by analysing the TP and OP rates.

The relationship between sarcopenia and oral sarcopenia in elderly people.

BACKGROUND: Sarcopenia in the oral region, including the tongue, leads to declined swallowing function and dysphagia. Muscle mass and strength, and motor function in the oral region have not been examined together, and the relationship between generalised and oral sarcopenia remains unclear. OBJECTIVE(S): The purpose of this study is to clarify the relationship between generalised sarcopenia and oral sarcopenia in the elderly in order to facilitate the establishment of a method for assessing oral sarcopenia. METHODS: A total of 54 elderly persons participated in this study. We examined the skeletal muscle mass index (SMI), grip strength (GS) and walking speed (WS) as the index of generalised sarcopenia, and the cross-sectional area of the geniohyoid muscle (CSG), tongue pressure (TP) and oral diadochokinesis (ODK) as the index of oral sarcopenia. RESULTS: We found a moderate correlation between CSG and SMI, a weak correlation between GS and TP, and a moderate correlation between WS and ODK. CSG, TP and ODK were significantly smaller in the sarcopenia group than in the non-sarcopenia group. By multiple regression analysis, SMI and TP were significantly associated with CSG. ODK, BMI and CSG were significantly associated with TP. WS and SMI were significantly associated with ODK. CONCLUSION: CSG, TP and ODK were confirmed as endpoints of oral sarcopenia. All endpoints of oral sarcopenia were influenced by those of generalised sarcopenia.

The success rate of oral appliances based on multiple criteria according to obstructive sleep apnoea severity, BMI and age: A large multicentre study.

BACKGROUND: The efficacy of oral appliance (OA) varies greatly in patients with obstructive sleep apnoea (OSA). OBJECTIVE(S): The purpose of this cross-sectional study was to investigate the success rate of OA for OSA patients. METHODS: This study was based on a cross-sectional multicentre survey of OA therapy for the management of OSA called the JAMS (Japanese Cross-sectional Multicenter Survey) Study performed at 10 medical institutions. A total of 442 patients fulfilled the selection criteria, which patients had worn OA, and undergone overnight polysomnography to assess both the pre-treatment baseline and follow-up for OA. Age, sex, BMI and apnoea-hypopnea index (AHI) at the time of diagnosis and follow-up for OA were extracted. RESULTS: After OA treatment, the mean AHI decreased from 22.6 ± 13.8 to 10.0 ± 10.2/h, and the mean rate of decrease in the AHI was 52.5 ± 38.4%. Regarding the success rate to OA therapy, criterion 1 (AHI < 5/h), criterion 2 (AHI < 10/h), criterion 3 (AHI < 15/h) and criterion 4 (AHI reduction rate ≥ 50%) accounted for 33.5, 66.3, 80.5 and 63.3%, respectively. The success rate of OA treatment decreased according to the increase in OSA severity, obesity level (higher BMI) and older age. CONCLUSIONS: This study revealed the treatment success rate of OA on multiple criteria according to OSA severity, BMI and age. It may support for the clinician to make a decision on the OSA management.

Novel Cholera Toxin Variant and ToxT Regulon in Environmental Vibrio mimicus Isolates: Potential Resources for the Evolution of Vibrio cholerae Hybrid Strains.

Atypical El Tor strains of Vibrio cholerae O1 harboring variant ctxB genes of cholera toxin (CT) have gradually become a major cause of recent cholera epidemics. Vibrio mimicus occasionally produces CT, encoded by ctxAB on CTXФ genome; toxin-coregulated pilus (TCP), a major intestinal colonization factor; and also the CTXФ-specific receptor. This study carried out extensive molecular characterization of CTXФ and ToxT regulon in V. mimicusctx-positive (ctx+) strains (i.e., V. mimicus strains containing ctx) isolated from the Bengal coast. Southern hybridization, PCR, and DNA sequencing of virulence-related genes revealed the presence of an El Tor type CTX prophage (CTXET) carrying a novel ctxAB, tandem copies of environmental type pre-CTX prophage (pre-CTXEnv), and RS1 elements, which were organized as an RS1-CTXET-RS1-pre-CTXEnv-pre-CTXEnv array. Additionally, novel variants of tcpA and toxT, respectively, showing phylogenetic lineage to a clade of V. cholerae non-O1 and to a clade of V. cholerae non-O139, were identified. The V. mimicus strains lacked the RTX (repeat in toxin) and TLC (toxin-linked cryptic) elements and lacked Vibrio seventh-pandemic islands of the El Tor strains but contained five heptamer (TTTTGAT) repeats in ctxAB promoter region similar to those seen with some classical strains of V. cholerae O1. Pulsed-field gel electrophoresis (PFGE) analysis showed that all the ctx+V. mimicus strains were clonally related. However, their in vitro CT production and in vivo toxigenicity characteristics were variable, which could be explainable by differential transcription of virulence genes along with the ToxR regulon. Taken together, our findings strongly suggest that environmental V. mimicus strains act as a potential reservoir of atypical virulence factors, including variant CT and ToxT regulons, and may contribute to the evolution of V. cholerae hybrid strains.IMPORTANCE Natural diversification of CTXФ and ctxAB genes certainly influences disease severity and shifting patterns in major etiological agents of cholera, e.g., the overwhelming emergence of hybrid El Tor variants, replacing the prototype El Tor strains of V. cholerae This report, showing the occurrence of CTXET comprising a novel variant of ctxAB in V. mimicus, points out a previously unnoticed evolutionary event that is independent of the evolutionary event associated with the El Tor strains of V. cholerae Identification and cluster analysis of the newly discovered alleles of tcpA and toxT suggest their horizontal transfer from an uncommon clone of V. cholerae The genomic contents of ToxT regulon and of tandemly arranged multiple pre-CTXФEnv and of a CTXФET in V. mimicus probably act as salient raw materials that induce natural recombination among the hallmark virulence genes of hybrid V. cholerae strains. This report provides valuable information to enrich our knowledge on the evolution of new variant CT and ToxT regulons.

The efficacy of nasal airway stent (Nastent) on obstructive sleep apnoea and prediction of treatment outcomes.

BACKGROUND: Obstructive sleep apnoea (OSA) is characterised by recurrent episodes of partial or complete upper airway collapse during sleep and is highly prevalent in the general population. The nasopharyngeal airway stent (Nastent) is a specifically designed, preformed silicone tube that intends to maintain the upper airway patency during sleep and reduce snoring and sleep apnoea. OBJECTIVE(S): The purpose of this study was to determine the efficacy of Nastent treatment and examine predictors for Nastent treatment outcomes in patients with OSA. METHODS: Consecutive thirty patients were enrolled in this study. Cephalometric radiographs were obtained to analyse the pharyngeal and craniofacial morphology. Before and after Nastent treatment, we evaluated OSA using a portable sleep study. RESULTS: Twenty-nine subjects completed this study. There were significant decreases in the respiratory event index (REI) (22.4 ± 14.1 to 15.7 ± 10.4, P < 0.01) and a significant increase in the lowest SpO2 (81.9 ± 7.5 to 86.6 ± 4.8, P < 0.01) by Nastent treatment. Subjects were divided into responders and non-responders based on reduction in REI of >50% compared with baseline REI. We evaluated the ratio of inferior airway width and middle airway width (IAW/MAW) on cephalograms as the index of the narrowest airway site. The IAW/MAW was significantly higher in responders than in non-responders (1.4 ± 0.9 vs 0.9 ± 0.4, P < 0.01) and predicted treatment responders with high accuracy (sensitivity: 90.9%, specificity: 88.9%, when IAW/MAW was set at 1.10). CONCLUSIONS: The Nastent device improved OSA, and a narrower velopharynx than hypopharynx predicted treatment response with a good sensitivity and specificity.

Titration technique using endoscopy for an oral appliance treatment of obstructive sleep apnea.

The degree of mandibular protrusion for an oral appliance (OA) should be customized for each patient with obstructive sleep apnea (OSA). This article describes the mandibular titration technique for OAs to effectively treat OSA by using endoscopy to evaluate the change in the airway at the velopharynx. This technique may minimize the degree of mandible protrusion and contribute to both the efficacy of and compliance with OA therapy.

Endoscopy evaluation to predict oral appliance outcomes in obstructive sleep apnoea.

The objective of this study was to determine the utility of nasoendoscopy of the upper airway as a predictor of the efficacy of oral appliance treatment in obstructive sleep apnoea (OSA).A total of 61 consecutive patients with moderate-to-severe polysomnographically diagnosed OSA were recruited for this study. Using nasoendoscopy, we prospectively assessed the velopharynx and oro/hypopharynx in each patient while awake and in the supine position. We measured cross-sectional area (CSA), and anteroposterior and lateral diameters of the airway before and after mandibular advancement, and expressed the changes in dimensions as expansion ratios (after/before). We then compared the measurements of responders and nonresponders with oral appliance treatment.The expansion ratio (median (interquartile range)) for the CSA was greater in responders compared with nonresponders in the velopharynx (2.9 (2.3-5.0) versus 1.7 (1.5-1.9), p<0.001) and in the oro/hypopharynx (3.4 (2.5-5.6) versus 2.4 (1.8-3.7), p<0.05). Baseline apnoea-hypopnoea index and the CSA expansion ratio of the velopharynx were independent predictors of oral appliance treatment outcome based on a multivariate logistic regression analysis. The estimated area under the receiver operator characteristic curve was 0.87 and the cut-off value of the expansion ratio was 2.00.These results indicate that nasoendoscopy may have significant clinical utility in predicting the success of oral appliance treatment.

Sleep Stage Coordination of Respiration and Swallowing: A Preliminary Study.

Swallowing is an important physiological response that protects the airway. Although aspiration during sleep may cause aspiration pneumonia, the mechanisms responsible have not yet been elucidated. We evaluated the coordination between respiration and swallowing by infusing water into the pharynx of healthy young adults during each sleep stage. Seven normal subjects participated in the study. During polysomnography recordings, to elicit a swallow we injected distilled water into the pharynx during the awake state and each sleep stage through a nasal catheter. We assessed swallow latency, swallow apnea time, the respiratory phase during a swallow, the number of swallows, and coughing. A total number of 79 swallows were recorded. The median swallow latency was significantly higher in stage 2 (10.05 s) and stage 3 (44.17 s) when compared to awake state (4.99 s). The swallow latency in stage 3 showed a very wide interquartile range. In two subjects, the result was predominantly prolonged compared to the other subjects. There was no significant difference in the swallow apnea time between sleep stages. The presence of inspiration after swallowing, repetitive swallowing, and coughing after swallowing was more frequent during sleep than when awake. This study suggests that the coordination between respiration and swallowing as a defense mechanism against aspiration was impaired during sleep. Our results supported physiologically the fact that healthy adult individuals aspirate pharyngeal secretions during sleep.

Incidence and risk factors for recurrent spontaneous preterm birth: A retrospective cohort study in Japan.

AIM: The aim of this study was to assess the incidence and risk factors for recurrent spontaneous preterm birth (PTB) in Japan. MATERIAL AND METHODS: A retrospective cohort study was conducted at five tertiary perinatal centers in Osaka, Japan from 2008 through 2012. Perinatal data were collected from medical records of women with a singleton gestation and a previous spontaneous PTB. Exclusion criteria were first-trimester spontaneous abortion, first antenatal visit beyond 14 weeks of gestation, and previous PTB with medical indications, placenta previa, abruptio placenta, multiple pregnancy, fetal anomaly, and antepartum fetal demise. The associations between recurrent spontaneous PTB and perinatal factors were evaluated by logistic regression analysis. RESULTS: Of 547 women with a previous spontaneous PTB, 89 (16.3%) suffered a recurrent spontaneous PTB. The risk factors for recurrence included multiple previous spontaneous PTB (adjusted odds ratio [aOR]: 2.26; 95% confidence interval [CI]: 1.19-4.30; P = 0.013), no previous term birth (aOR: 2.08; 95%CI: 1.24-3.49; P = 0.005), and interpregnancy interval < 12 months (aOR: 2.13; 95%CI: 1.17-3.85; P = 0.013). CONCLUSION: Approximately one in six women with a previous spontaneous PTB suffered a recurrent spontaneous PTB. Multiple previous spontaneous PTB, no previous term birth, and short interpregnancy interval were independent risk factors for recurrence.

Videoendoscopic diagnosis for predicting the response to oral appliance therapy in severe obstructive sleep apnea.

PURPOSE: In treatment for obstructive sleep apnea (OSA), oral appliance (OA) therapy is indicated in patients with mild-moderate OSA. However, since patients with severe OSA in whom OA therapy was effective have also been reported, it may not be possible to determine indications for OA therapy based on the severity alone. The purpose of this study was to determine indications for OA therapy using endoscopy during wakefulness in patients with severe OSA. METHODS: The subjects consisted of 36 patients (27 males and 9 females) diagnosed with severe OSA using all-night polysomnography. In each patient, a nasoendoscope was inserted in a horizontal position during nasal breathing, and morphological changes in the airway of the velopharynx and oro-hypopharynx with mandibular advancement were evaluated. RESULTS: With mandibular advancement, the oro-hypopharynx was widened in all patients while the velopharynx was widened in 29 patients, but not in 7. The apnea hypopnea index (AHI) reduction rate after OA application was 79.8% (SD, 13.0%) in the group with and 40.6% (SD, 27.0%) in the group without velopharyngeal widening, being significantly different between the two groups. In the group showing velopharyngeal widening, evaluation of the direction of widening revealed two types: the "all-round type", which is circumferential widening in the anteroposterior-lateral directions, and the "lateral dominant type", which is widening mainly in the lateral direction. The AHI reduction rate was 80.1% (SD, 15.0%) for the all-round type and 79.3% (SD, 10.6%) for the lateral dominant type showing no significant difference. DISCUSSION: (1) Concerning indications for OA therapy, findings in the velopharynx rather than those in the hypopharynx may be important. (2) The effects of OA therapy can be expected in the presence of velopharyngeal widening irrespective of its direction. Thus, to determine whether OA therapy is indicated, endoscopic evaluation of morphological changes in the velopharynx with mandibular advancement may be important.

The efficacy of a lingual augmentation prosthesis for swallowing after a glossectomy: a clinical report.

The excision of malignant tongue tumors often produces tongue defects that can cause dysphagia. A palatal augmentation prosthesis is frequently used to treat such dysphagia. This report describes a patient who received a palatal augmentation prosthesis after a glossectomy for malignant cancer of the tongue; however, no improvement was noted in swallowing function. A lingual augmentation prosthesis was then applied to the mandible, which resulted in improved swallowing function.

Focus of dental sleep medicine on obstructive sleep apnea in older adults: A narrative review.

PURPOSE: To review dental sleep medicine in older adults based on the literature. STUDY SELECTION: This narrative review focuses on sleep physiology, common sleep disorders, and obstructive sleep apnea (OSA) in older adults and their management. RESULTS: Sleep physiology differs between older and younger adults, with sleep disturbances occurring more frequently in older adults. The prevalence of insomnia increases in older adults due to age-related changes in sleep physiology. Insomnia, sleep-disordered breathing, periodic limb movement disorder, restless legs syndrome, and rapid eye movement (REM) sleep behavior disorder are common sleep disorders in older adults. OSA is more prevalent in older adults, and its effects on them are considered more substantial than those on younger adults. The treatment of older patients with mandibular advancement devices may be less effective and more complex owing to potential impairments in oral and dental health. Furthermore, the prevalence of edentulism in older adults is decreasing while life expectancy is increasing. CONCLUSIONS: As older adults have comorbidities that affect sleep quality, dentists should consider the effects of sleep physiology and sleep disorders in these patients. OSA may decrease the quality of life and increase the risk of developing other diseases. Therefore, dentists proposing treatment with mandibular advancement devices need to inform patients of their potential lack of efficacy and the requirement for careful follow-up owing to known and unknown side effects.

The efficacy of occlusal appliance with a moisturizing gel pocket on sleep quality in patients with nocturnal xerostomia: A case series.

PATIENTS: A case series of five patients (mean age, 77.0 years) with complaints of nocturnal xerostomia were subjected to occlusal appliance treatment with a reservoir of moisturizing gel during the night. An occlusal appliance covers the dental arch and hard palate, providing space in the midline of the hard palate to hold the moisturizing gel. Sleepiness was assessed using the Epworth Sleepiness Scale (ESS), and sleep quality was assessed using the Japanese version of the Pittsburgh Sleep Questionnaire (PSQI-J) before and after treatment. The total PSQI-J scores decreased in all patients after treatment. The ESS score, sleep time, and sleep efficiency improved or remained unchanged and none of the patients' symptoms worsened. DISCUSSION: This study demonstrated the efficacy of occlusal appliance treatment in patients with dry mouth in improving self-reported sleep quality. Patients included those with nocturnal xerostomia and poor sleep quality on the PSQI-J. Treatment with xerostomia resulted in improved sleep quality, as assessed by the decrease in PSQI-J scores. CONCLUSIONS: This case series suggests that sleep quality may be worse in patients with xerostomia, and that treatment for nocturnal xerostomia using occlusal appliances may improve sleep quality.

Relationships between the Nutrition Status and Oral Measurements for Sarcopenia in Older Japanese Adults.

INTRODUCTION: The purpose of the present study was to clarify the relationships between the risk of malnutrition as a preliminary stage of malnutrition and overall and oral measurements for sarcopenia in older Japanese adults. METHODS: Forty-five participants (79.7 ± 6.1 years) were included in the analysis. The nutrition status of the participants was assessed using the Mini Nutritional Assessment-Short Form (MNA-SF) and classified into two groups: normal and at risk of malnutrition. Overall measurements for sarcopenia in the present study were the skeletal muscle mass index, grip strength, and walking speed, while oral measurements were the cross-sectional area of the geniohyoid muscle, tongue pressure (TP), and oral diadochokinesis. RESULTS: MNA-SF correlated with TP (r = 0.347, p = 0.019). We observed decreases of 5.7 kPa in TP and 3.9 kg/cm2 in BMI in the at risk of malnutrition group. A multiple regression analysis of parameters contributing to the risk of malnutrition identified TP as an independent variable (ß = 0.913, p = 0.042). CONCLUSIONS: The present results demonstrate that the risk of malnutrition is associated with TP as an oral measurement for sarcopenia, but not overall measurements for sarcopenia. Therefore, low TP may be related with the risk of malnutrition.

Retained products of conception (RPOC) following delivery without placenta previa: Which patients with RPOC show postpartum hemorrhage?

INTRODUCTION: To clarify the perinatal outcome of retained products of conception (RPOC) after 22 weeks or more. METHODS: The retrospective cohort study reviewed medical records of patients with RPOC without placenta previa at 186 Japanese perinatal centers. RESULTS: Of the 323 patients with RPOC, pregnancies after assisted reproductive technology (ART) accounted for 43%. Transfusion at delivery was required in 33% of the patients. Logistic regression analyses revealed that transfusion was significantly required in the following situations: ART pregnancy (aOR: 6.0, 95%CI: 2.3-16, P < 0.001), and RPOC length ≥4 cm (aOR: 5.3, 95%CI: 2.1-13, P < 0.001). Transarterial embolization (TAE) and/or hysterectomy for subsequent RPOC-related bleeding was performed in 60 patients with RPOC. Logistic regression analysis revealed that additional interventions were significantly required in the following situations: multiparity (aOR: 6.1, 95%CI: 2.1-17.2, P < 0.001), and hypervascular RPOC (aOR: 12.8, 95%CI: 3.2-51.1, P < 0.001). TAE and/or hysterectomy was also frequently employed in ART pregnancy, although this was not significant (aOR: 2.8, 95%CI: 0.9-8.2, P = 0.063). DISCUSSION: Patients with RPOC were significantly more likely to require transfusion at delivery in the presence of large RPOC and ART. They were also more likely to require hemostatic procedures for subsequent bleeding in the presence of hypervascular RPOC and ART.

Prevalence, O-genotype and Shiga toxin (Stx) 2 subtype of Stx-producing Escherichia coli strains isolated from Argentinean beef cattle.

The aims of this study were to investigate prevalence, O-genotype, and virulence gene profile including Shiga toxin (Stx) 2 gene-subtype of Stx-producing Escherichia coli (STEC) in beef cattle from the Bahía Blanca in Argentina. Rectal swabs were collected from 283 beef cattle in 2012. stx genes were detected in 90 (32%) out of the 283 rectal swabs by stx gene-specific PCR assay. The positive cases were 13 with stx1, 58 with stx2, and 19 with both stx1 and stx2. Among 90 stx gene-positive samples, 45 STEC strains were isolated, which included 3 stx1, 34 stx2, and eight stx1 and stx2 genes positive isolates. O-genotyping grouped 45 STEC strains into 19 different O-genotypes such as Og8, Og145, Og171, Og185 (4 from each), Og22, Og153, Og157 (3 from each) and others. Various stx2 gene-subtypes were identified in 42 STEC strains: 13 positive cases for stx2a, 11 for stx2c, 3 for stx2g, 10 for stx2a and stx2d, 4 for stx2a and stx2c, and 1 for stx2b, stx2c and stx2g. efaI gene, generally prevalent in clinical strains, was detected in relatively high in the STEC strains. These data suggest that stx2a and stx2c were distributed not only in O145 and O157 but also in minor O-genotypes of STEC in Argentina.

The efficacy of a titrated tongue-stabilizing device on obstructive sleep apnea: a quasi-experimental study.

STUDY OBJECTIVES: To evaluate the short-term efficacy and self-reported outcomes of tongue-stabilizing device (TSD) therapy as compared to those of mandibular advancement device (MAD) therapy in an adult population diagnosed with obstructive sleep apnea. METHODS: This study is a parallel, nonrandomized clinical trial of the TSD and MAD therapies. The efficacy of both interventions was evaluated objectively by level 3 home sleep apnea testing and by self-report using the Epworth Sleepiness Scale, the Functional Outcomes of Sleep Questionnaire, the Chalder Fatigue Scale, and the 36-Item Short-Form Health Survey. Adherence and adverse effects were self-reported. RESULTS: Of the 39 patients who received TSD therapy, 27 managed to adapt and complete the trial and were matched with 26 patients who received MAD therapy. At the 2-month follow-up, the acceptance rate of the TSD therapy was 53.8%. Both patients receiving TSD therapy and patients receiving MAD therapy showed significant improvements in their respiratory event index (P < .05), with no difference between the treatments (P > .05). In those receiving TSD therapy (n = 27), the only self-reported efficacy measure that significantly improved with TSD therapy was the Chalder Fatigue Scale (P < .05). In contrast, all 4 self-reported measures (Epworth Sleepiness Scale, Functional Outcomes of Sleep Questionnaire, 36-Item Short-Form Health Survey, and Chalder Fatigue Scale) showed a significant improvement with MAD therapy. CONCLUSIONS: This study revealed similar improvements in apneas and oxygen saturation between TSD and MAD therapies. Whereas MAD therapy was a better treatment for obstructive sleep apnea in terms of daytime sleepiness and quality-of-life improvements, TSD therapy had a low treatment acceptance rate. CLINICAL TRIAL REGISTRATION: Registry: ClinicalTrials.gov; Name: The Efficacy of Tongue Stabilizing Device in Patients with Obstructive Sleep Apnea; URL: https://clinicaltrials.gov/ct2/show/NCT02329925; Identifier: NCT02329925; and Registry: ClinicalTrials.gov; Name: Adherence and Preference of Continuous Positive Airway Pressure vs Mandibular Advancement Splints in Obstructive Sleep Apnea Patients: A Randomized Trial (CHOICE); URL: https://clinicaltrials.gov/ct2/show/NCT02242617; Identifier: NCT02242617. CITATION: Alshhrani WM, Hamoda MM, Okuno K, et al. The efficacy of a titrated tongue-stabilizing device on obstructive sleep apnea: a quasi-experimental study. J Clin Sleep Med. 2021;17(8):1607-1618.

Compliance and side effects of tongue stabilizing device in patients with obstructive sleep apnea.

Objective: To evaluate the long-term effectiveness, compliance, and side effects of tongue stabilizing devices (TSDs).Methods: Thirty-nine patients were followed up after 12 and 30 months. The subjective effectiveness was assessed using the Epworth Sleepiness Scale (ESS), the Functional Outcomes Sleep Questionnaire (FOSQ-10), the Chalder Fatigue Scale (CFQ), and a sleep-related quality of life questionnaire (QoL). Compliance and side effects were assessed.Results: At 12-months, 35.9% of patients confirmed continuing the therapy, compared to only 15.4% of patients at 30 months. At 30 months, a significant average improvement of ESS (2.0 ± 2.8) was observed compared to baseline levels in six patients. Six patients demonstrated an average increase in blood pressure. The most frequently reported side effects were mouth dryness and excessive salivation. The 3D analysis revealed small tooth movements.Conclusion: The TSD therapy demonstrated a good long-term subjective effectiveness against OSA but had a relatively low treatment acceptance rate.

Development of XRM-MacConkey agar selective medium for the isolation of Escherichia albertii.

Escherichia albertii has increasingly been recognized as an emerging pathogen. However, lack of selective medium for E. albertii is the bottleneck for clinical and epidemiological investigations. In this study, a selective medium for E. albertii named XRM-MacConkey agar, which is modified MacConkey agar supplemented with xylose (X), rhamnose (R), and melibiose (M) instead of lactose, was developed and evaluated. All 49 E. albertii and 6 different species out of 23 grew as colorless colonies, whereas 17 remaining species grew as red colonies. Detection limit of E. albertii by this medium was 105 CFU/g stool when examined with spiked healthy human stool. Furthermore, colorless colonies on XRM-MacConkey agar obtained from 7 E. albertii-positive diarrheal stools were consistently E. albertii. In contrast, 57%, 18%, and 36% colorless colonies on MacConkey, DHL, and mEA agars, respectively, were non-E. albertii. We concluded that XRM-MacConkey agar could specifically be used for isolation of E. albertii.