Nasal Insertion Research Articles

Pediatric water bead-related visits to United States emergency departments

ObjectiveTo evaluate the characteristics and trends of pediatric water bead-related visits to US emergency departments (EDs) using a large national database. MethodsData from the National Electronic Injury Surveillance System regarding ED visits by individuals <20 years old associated with water beads from January 1, 2007, through December 31, 2022, were retrospectively analyzed. ResultsBased on 307 reported cases, there were an estimated 8159 visits (95% CI: 4447-11,870) to US EDs from 2007 through 2022 involving water beads among <20-year-olds, and more than half (55.0%) of the 307 ED cases involved <5-year-olds. Most cases were treated and released (92.2%), which was consistent across all age groups. The proportion of cases admitted was highest among children <5 years old (10.1%), and this age group accounted for 17 of the 19 admissions (89.5%) in this study. All admissions among children <5 years old involved ingestions. Ingestion was the most common mechanism of injury (45.9%), followed by ear canal insertion (32.6%), nasal insertion (11.7%), and eye injury (8.8%). Although ingestions occurred most frequently among children one (28.4%) and two (23.4%) years of age, children 3 and 4 years old accounted for one-fifth of ingestions. The number of ED cases increased rapidly by 130.9% from 55 cases in 2021 to 127 in 2022. ConclusionsThe number of pediatric water bead-related ED visits is increasing rapidly. Children <5 years old are most commonly involved, usually via water bead ingestion. Increased prevention efforts are needed.

Comparison of Clinical Outcome of Bacterial Colonization between Nasogastric and Orogastric Enteral Feeding Tubes in Neonates in the Neonatal Intensive Care Unit

Introduction: Enteral feeding tubes are commonly utilized in the neonatal intensive care unit (NICU) due to the underdevelopment of coordination between sucking, swallowing, and breathing, or due to various diseases affecting the respiratory, cardiovascular, gastrointestinal, or neurological systems. The aim of the study was to investigate the differences in bacterial colonization patterns in hospitalized infants who received enteral feeding through either nasogastric (NG) or orogastric (OG) feeding tubes. Materials and Methods: This study was a hospital-based cross-sectional investigation that was carried out on infants who were admitted to the NICU. The NICU gathered feeding tubes throughout 4 months, beginning in August 2022 and continuing through December 2022. In addition, informed consent was collected from the participant’s parents or legal guardians for the entire group of people who took part in the research. The fact that the patient participated in this study had no bearing on the level of care that they were given. The research team gave serious consideration to recruiting any of the newborns who were receiving medical attention in the NICU and who had a feeding tube inserted during the time that sample collection was taking place. The infants did not receive any probiotics as a form of treatment in any of the cases. Results: Infants with NG tubes had a significantly higher number of C-sections ( P = 0.04), infants with NG tube were exclusively breastfed ( P = 0.02), and one or more dose of antenatal steroids was administered more in infants with OG tube ( P = 0.04). The most common types of bacteria found in NG and OG tubes were Proteobacteria (with a mean relative abundance of 50% and 60%, respectively), Firmicutes (with a mean relative abundance of 33% and 23%, respectively), and Actinobacteria (9% and 7%, respectively). Conclusion: Oral versus nasal feeding tube insertion was found to have a greater influence on bacterial colonization than any of the other clinical factors that were evaluated.

The Role of Invasive Hemodynamic Monitoring in Patients with Severe Mitral Regurgitation Undergoing Herniorrhaphy Operation

Background: Mitral regurgitation (MR) indeed presents challenges during noncardiac surgeries, especially as the severity of MR tends to increase with age and poses a higher risk of perioperative complications. Accurate hemodynamic monitoring becomes crucial in these cases to manage potential complications effectively. However, the standard monitoring in MR conditions during operation, such as TEE, is not always available, but there are other options for invasive monitoring, such as arterial lines, which provide accurate hemodynamic monitoring.&#x0D; Case presentation: A 64-year-old, male, presented with Reponible Lateral Inguinal Hernia with comorbid of severe mitral and tricuspid regurgitation alongside congestive heart failure. The patient was premedicated with fentanyl 25 mcg intravenously, followed by oxygen supplementation with 3 lpm nasal cannula and insertion of the arterial line. Anaesthesia was performed using a lumbar epidural technique, with the insertion of an epidural catheter in the L1-L2 intervertebral space, Reponible Lateral Inguinal Hernia. The local anesthesia agent chosen was plain bupivacaine with a concentration of 0.5% and a volume of 8 ml. The onset of action of epidural anesthesia is achieved within 20 minutes as long as the operation reaches a total blockade as high as T8. The patient is monitored with standard monitors and an artery line during surgery. There were no complaints of shortness of breath, chest heaviness, or chest pain felt by the patient during the operation.&#x0D; Conclusion: Epidural anesthesia technique can provide stable hemodynamics in patients with severe mitral-tricuspid regurgitation and congestive heart failure and hemodynamic monitoring plays an important role postoperatively to prevent further deterioration and maintain stability.

Monosyllabic Affective Hypocoristics of Korean Names

In this paper, I investigate the formation and phonological alternations of Korean monosyllabic hypocoristics that are used without a vocative marker. Korean monosyllabic hypocoristics are the result of truncation and merging. The study showed that the inclination to keep the second syllable is more pronounced in truncated forms. The most common type of merging is ‘onset of 1st syllable + rhyme of 2nd syllable’. This illustrates the symmetrical base anchoring template, in which the template’s edges are anchored to the base’s right and left edges. The phonological alternations that Korean monosyllabic hypocoristics go through include tensification of obstruents, stopping of plain fricative or affricate, nasal velarization, nasal insertion, vowel rounding, vowel simplification, and palatal glide insertion before a vowel. Consonantal alternations over vocalic alternations seem to be preferred. All of the segmental alternations are present in the Aegyo speech register.

Safety and Diagnostic Accuracy of the Transnasal Approach for Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration (EBUS-TBNA).

Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a safe and accurate diagnostic procedure used for investigating mediastinal pathologies. It is usually performed using an oral approach. The nasal route has been proposed but not extensively investigated. With the aim to report the use of linear EBUS through the nasal route and compare its accuracy and safety with the oral one, we conducted a retrospective analysis of the subjects who underwent an EBUS-TBNA procedure at our center. From January 2020 to December 2021, 464 subjects underwent an EBUS-TBNA, and in 417 patients, EBUS was performed through the nose or mouth. Nasal insertion of the EBUS bronchoscope was performed in 58.5% of the patients. No difference between the two insertion routes was observed in terms of location or number of stations sampled per subject. Procedure complications were mild and similar between the two groups (10.2% for the nasal group vs. 9.8% for the oral group). Minor epistaxis occurred in five subjects in the nasal group. Comparing the two groups, the rates of adequate specimens were similar (95.1% vs. 94.8%), as were the proportions of diagnostic specimens (84% vs. 82%). In conclusion, the nasal route for EBUS-TBNA is a valid alternative to the oral one.

Preoperative Clonidine with Perioperative Dexmedetomidine for Attenuating Haemodynamic Responses and Blood Loss in Patients Undergoing Elective Transnasal Transsphenoidal Resection of Pituitary Tumours: A Randomised Clinical Study

Introduction: Transsphenoidal resection of pituitary tumours presents challenges for an anaesthesiologist due to haemodynamic fluctuations caused by intense nociceptive stimuli during different surgical stages. This relatively short procedure requires a smooth and rapid emergence for spontaneous airway control and assessment of surgical outcomes. Therefore, the chosen anaesthetic agent should provide effective haemodynamic control and facilitate rapid recovery. Alpha-2 agonists such as dexmedetomidine and clonidine are known to centrally decrease noradrenaline release, thus reducing sympathetic outflow. This could be particularly beneficial in minimising haemodynamic fluctuations during such surgeries. Aim: To compare the effects of preoperative clonidine and perioperative dexmedetomidine in attenuating haemodynamic responses and blood loss in patients undergoing elective Transnasal Transsphenoidal resection (TNTS) of pituitary tumours. Materials and Methods: A randomised, double-blinded study was conducted in the Department of Neuroanesthesiology at Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India, over a period of one year, from February 2022 to January 2023. Sixty patients of either sex, aged 18-65 years with ASA I or II, scheduled for elective TNTS pituitary surgery, were enrolled and divided into group A and group B. Group A received clonidine tablets (3 mcg/kg) 180 minutes prior to surgery, while group B received intravenous (i.v.) infusion of dexmedetomidine (1 mcg/kg/min) over 10 minutes before induction, followed by 0.5-0.7 mcg/kg/hr. Group A received a placebo of 0.9% Normal Saline (NS) (50 mL). Heart Rate (HR), Systolic Blood Pressure (SBP), Diastolic Blood Pressure (DBP), and Mean Arterial Pressure (MAP) were recorded at baseline, intubation, nasal pack insertion, endoscope insertion, and at various time intervals. Data obtained were analysed using unpaired sample t-test for independent groups, and Chi-square test was used for categorical data. A probability value of 0.05 was considered significant for both statistical tests. Results: The mean age of participants was 42±11 years for group A and 43±12 years for group B, with a male: female ratio of 66.6% to 33.3% in group A and 70% to 30% in group B, respectively. The mean Body Mass Index (BMI) was 26.4±3.2 in group A and 25.2±1.7 in group B. HR, SBP, and MAP decreased at various stages in group B compared to group A, and these differences were statistically significant (p-value &lt;0.05). The study also found that the total consumption of propofol was significantly less in group B (220±38) compared to group A (282±140). Similarly, total fentanyl consumption was significantly lower in group B (5.83±1.60) than in group A (16.6±23.9). Although not statistically significant, total blood loss was also lower in group B (115±63) compared to group A (156±108). Conclusion: Intraoperative infusion of i.v. dexmedetomidine provides a reasonable choice compared to orally administered clonidine for transsphenoidal pituitary tumour resection, considering its favorable effects on haemodynamic stability and anaesthetic requirements.

Comparison of high-flow nasal cannula and conventional nasal cannula during sedation for endoscopic submucosal dissection: a retrospective study.

The high-flow nasal cannula (HFNC) is a relatively recent method that provides high-flow, heated, humidified gas delivery. We compared HFNC (group HF) and conventional nasal cannula (NC) (group CO) during deep sedation with propofol and remifentanil for endoscopic submucosal dissection (ESD). Single-center, retrospective observational cohort study. In this study, a total of 159 cases were analyzed (group CO, 71 and group HF, 88). We collected the data from electronic medical records from September 2020 to June 2021. The lowest oxygen saturation (SpO2), incidence of hypoxia (SpO2 < 90%), rescue interventions, and adverse events between the two groups were investigated. There were significant differences between the two groups in lowest SpO2 and incidence of hypoxia [group CO versus group HF; 90.3 ± 9.7% versus 95.7 ± 9.0%, 25 (35.2%) versus 10 (11.4%); p < 0.001, p < 0.001; respectively]. Among the rescue interventions, the number of jaw thrust, patient stimulation, O2 flow increase, and nasal airway insertion were significantly higher in the CO group than in the HF group. However, postprocedural chest X-ray showed higher rates of abnormal findings (atelectasis, aspiration, and pneumoperitoneum) in group HF than in group CO [group CO: 8 (11.3%) versus group HF: 26 (29.5%), p = 0.005]. In multivariable analysis, besides group CO, difficult type of lesion was the risk factor for hypoxia. Compared to the conventional NC, HFNC provided adequate oxygenation and a stable procedure without significant adverse events during sedation for ESD. However, caution is needed to avoid complications associated with deep sedation and difficult type of lesions.

IS SURGICAL TREATMENT OF VELOPHARYNGEAL INSUFFICIENCY BY MYOMUCOSAL POSTERIOR PHARYNGEAL FLAP A CONTRAINDICATION FOR NASAL INTUBATION? A NARRATIVE REVIEW.

Velopharyngeal insufficiency is a disorder where the soft palate directs the air through the nose. It is often present in patients with previous cleft or short palate, but also in many other conditions. Symptoms are primarily to be found in speech, with very distinct nasal sound. After clinical evaluation and nasal endoscopy, surgery is considered. Several surgical techniques are in use, with posterior pharyngeal flap pharyngoplasty being most widely used. This method leaves the base of the posterior pharyngeal flap attached to the posterior pharyngeal wall, with two lateral ports on each side of the flap. Permanent nasopharyngeal obstruction is a very challenging pathology for anesthesiologists in case of mandatory nasal intubation since it is a relative contraindication for nasal intubation. Patients with previous palatoplasty will regularly appear in our routine anesthetic practice, in all surgical segments. The high risk of damage to the flap with possible bleeding can put the anesthesiologist in a very unpleasant situation if not aware of the permanent effect of this surgery. During preanesthetic assessment, if there is information on a previous pharyngoplasty, one should consider alternative options for nasotracheal intubation. All nasal insertion procedures must be either avoided or carried out with great caution, under fiberoptic visual control.

The missing piece of the puzzle: larval morphology of Xenohyla truncata (Anura: Hylidae: Dendropsophini) and its implication to the evolution of Dendropsophini tadpoles

Dendropsophini is a highly diverse clade with a controversial phylogenetic and taxonomic history. Different generic arrangements have been proposed and the monophyly of several clades supported or rejected. Previous evidence suggested that larval morphology could play an important role in our understanding of the evolution and diversification of Dendropsophini, although data are missing for most lineages, including the sister group of Dendropsophus, Xenohyla. Herein we describe the internal morphology of the tadpoles of X. truncata and compare our results with available information for members of Dendropsophini and closely related lineages. We propose that the presence of a fan-like papilla in the buccopharyngeal cavity, a single element suprarostral, and a triangular process at the base of the muscular process are synapomorphies for Dendropsophini; moreover, the presence of a divided m. subarcualis rectus II–IV seems to be a synapomorphy for Pseudini and, the nasal sac insertion of the m. levator lateralis could be a synapomorphy of Dendropsophini + Pseudini.

Pediatric Battery-Related Emergency Department Visits in the United States: 2010-2019.

To describe the epidemiology of battery-related emergency department (ED) visits among children aged <18 years in the United States from 2010 to 2019 and compare with previous study findings. Data on ED visits were obtained from the National Electronic Injury Surveillance System. Using narrative descriptions and diagnosis codes, battery-related cases were coded into four exposure routes: (1) ingestion, (2) mouth exposure, (3) ear insertion, and (4) nasal insertion. An estimated 70 322 (95% confidence interval: 51 275-89 369) battery-related ED visits among children aged <18 years occurred during the study period, or 9.5 per 100 000 children annually. Button batteries were implicated in 84.7% of visits where battery type was described. A statistically significant increase in the ED visit rate occurred from 2010 to 2017 (P = .03), followed by a nonstatistically significant decrease from 2017 to 2019. The ED visit rate was highest among children aged ≤5 years compared with those 6 to 17 years (24.5 and 2.2 per 100 000 children, respectively). The mean patient age was 3.2 years (95% confidence interval: 2.9-3.4). Ingestions accounted for 90.0% of ED visits, followed by nasal insertions (5.7%), ear insertions (2.5%), and mouth exposures (1.8%). Pediatric battery-related ED visit rates continued to significantly increase from 2010 to 2017, with children aged ≤5 years having the highest rates. Prevention efforts have not significantly reduced injury rates; therefore, regulatory efforts are needed. Ultimately, hazard reduction or elimination through safer button battery design is critical and should be adopted by the battery industry.

Pre-operative nasal probe tests with adrenaline and lidocaine ease insertion during flexible bronchoscopy and reduce post-operative bleeding: a randomized controlled trial.

Background:Nasal insertion is the preferred method for non-intubated patients in flexible bronchoscopy; however, the relatively narrow nasal cavity results in difficulties related to bronchoscope insertion. This study aimed to investigate whether pre-operative nasal probe tests could reduce the time to pass the glottis, improve the first-pass success rate and patients’ tolerance, and reduce postoperative bleeding.Methods:This three-arm prospective randomized controlled trial was conducted in a tertiary hospital between May and October 2020. Three hundred patients requiring diagnosis and treatment using flexible bronchoscopy were randomly allocated to three groups: control group, simple cotton bud detection group (CD group), and adrenaline + lidocaine detection group (AD group). The primary outcome was the time to pass the glottis. Secondary outcomes included the first-pass success rate, the patients’ tolerance scores, and post-operative bleeding. One-way analysis of variance, Kruskal-Wallis H test, Chi-squared test, Fisher's exact test, and Bonferroni's multiple comparison tests were used in this study.Results:In total, 189 men and 111 women were enrolled in this study, with a mean age of 55.72 ± 12.86 years. The insertion time was significantly shorter in the AD group than in the control group (18.00 s [12.00–26.50 s] vs. 24.00 s [14.50–45.50 s], P = 0.005). Both the AD (99% vs. 83%, χ2 = 15.62, P < 0.001) and CD groups (94% vs. 83%, χ2 = 5.94, P = 0.015) had a significantly higher first-pass success rate than the control group. Compared with the control group, post-operative bleeding (1% vs. 13%, χ2 = 11.06, P < 0.001) was significantly lower in the AD group. However, no significant difference was found in the patients’ tolerance scores.Conclusions:Pre-operative nasal cavity probe tests especially with adrenaline and lidocaine during flexible bronchoscopy can significantly reduce the time to pass the glottis, improve the first-pass success rate, and reduce post-operative nasal bleeding. Pre-operative nasal probe tests are recommended as a time-saving procedure for patients undergoing flexible bronchoscopy.Trial registration:Chinese Clinical Trial Registry (ChiCTR), ChiCTR2000032668; http://www.chictr.org.cn/showprojen.aspx?proj=53321.

The preequatorial nasal superior oblique tendon syndrome

Abnormal superior oblique (SO) tendons have been characterized in both congenital and acquired palsies. The nasal insertion variant (class II) is rare but usually associated with a loose tendon in congenital cases. Iatrogenic anteriorization and nasal displacement of the SO can also occur following ocular surgery.

Analysis of Nasal Foreign Bodies in South Korea: Over 10-Year Experience

Foreign bodies (FBs) in the nasal cavity are commonly encountered in otorhinolaryngology. This retrospective study was conducted between January 2009 and December 2020. The nasal FB frequencies were investigated according to age and sex. The type, shape, and location of the FBs, onset, and clinical features were obtained. In a total of 1228 cases, the average age was 3.9 ± 5.7 years. We found a higher incidence in patients 2–4 years old. The most frequent nasal FBs were beads (24.0%), toys/plastics (17.8%), and beans/corn (15.8%). However, there were some differences in the nasal FB types according to the age group. There was no difference in the location of the nasal FBs according to age group, but nasal FBs were found more frequently in the right nasal cavity in the 1–3-years-old groups. Most patients (97.5%) visited the hospital the same day when the nasal FB insertion was suspected, and most were asymptomatic. After the removal of the nasal FBs, most patients were free of complications. Of the nine cases involving button batteries, septal perforation was observed in two patients who visited the hospital one or two days after the FB insertion. There were specific age-based characteristics of the nasal FBs that may serve as a basis for specific precautions.

Analysis of the Effect of Blind Bedside Nasal Intestinal Tube Insertion on the Effect of Enteral Nutritional Feeding and Complications in Severe Patients

Analysis of the Effect of Blind Bedside Nasal Intestinal Tube Insertion on the Effect of Enteral Nutritional Feeding and Complications in Severe Patients

Nasal pressure swings as the measure of inspiratory effort in spontaneously breathing patients with de novo acute respiratory failure

BackgroundExcessive inspiratory effort could translate into self-inflicted lung injury, thus worsening clinical outcomes of spontaneously breathing patients with acute respiratory failure (ARF). Although esophageal manometry is a reliable method to estimate the magnitude of inspiratory effort, procedural issues significantly limit its use in daily clinical practice. The aim of this study is to describe the correlation between esophageal pressure swings (ΔPes) and nasal (ΔPnos) as a potential measure of inspiratory effort in spontaneously breathing patients with de novo ARF.MethodsFrom January 1, 2021, to September 1, 2021, 61 consecutive patients with ARF (83.6% related to COVID-19) admitted to the Respiratory Intensive Care Unit (RICU) of the University Hospital of Modena (Italy) and candidate to escalation of non-invasive respiratory support (NRS) were enrolled. Clinical features and tidal changes in esophageal and nasal pressure were recorded on admission and 24 h after starting NRS. Correlation between ΔPes and ΔPnos served as primary outcome. The effect of ΔPnos measurements on respiratory rate and ΔPes was also assessed.ResultsΔPes and ΔPnos were strongly correlated at admission (R2 = 0.88, p < 0.001) and 24 h apart (R2 = 0.94, p < 0.001). The nasal plug insertion and the mouth closure required for ΔPnos measurement did not result in significant change of respiratory rate and ΔPes. The correlation between measures at 24 h remained significant even after splitting the study population according to the type of NRS (high-flow nasal cannulas [R2 = 0.79, p < 0.001] or non-invasive ventilation [R2 = 0.95, p < 0.001]).ConclusionsIn a cohort of patients with ARF, nasal pressure swings did not alter respiratory mechanics in the short term and were highly correlated with esophageal pressure swings during spontaneous tidal breathing. ΔPnos might warrant further investigation as a measure of inspiratory effort in patients with ARF.Trial registration: NCT03826797. Registered October 2016.

Computational Modeling of Nasal Drug Delivery Using Different Intranasal Corticosteroid Sprays for the Treatment of Eustachian Tube Dysfunction.

Eustachian tube dysfunction (ETD) is a common otolaryngologic condition associated with decreased quality of life. The first-line treatment of ETD is intranasal corticosteroid sprays (INCS). Computational fluid dynamics (CFD) was used to study particle deposition on the Eustachian tube (ET) using two commercial INCS (Flonase and Sensimist). Simulations also considered the effects of nostril side, insertion depth, insertion angle, cone spray angle, inhaling rates, wall impingement treatment, and fluid film. Flonase and Sensimist produced different particle size distributions and sizes. Sensimist droplets are smaller, less sensitive to asymmetry in nostrils anatomy and variation in insertion angle, and therefore can reach the posterior nasopharynx more readily. Flonase produces larger particles with greater inertia. Its particles deposition is more sensitive to intrasubject variation in nasal anatomy and insertion angles. The particle deposition on the ET was sensitive to the wall impingement model. The deposition on the ET was insignificant with adherence only <0.15% but increased up to 1-4% when including additional outcomes rebound and splash effects when droplets impact with the wall. The dose redistribution with the fluid film is significant but plays a secondary effect on the ET deposition. Flonase aligned parallel with the hard palate produced 4% deposition efficiency on the ET, but this decreased <0.14% at the higher insertion angle. INCS with larger droplet sizes with a small insertion angle may be more effective at targeting droplet deposition on the ET opening.

Button battery insertion (PilBouTox®): A prospective study of all insertion routes

Button battery (BB) insertion is less common than ingestion, but can induce local necrosis and perforation. This study aimed to evaluate the causes, clinical manifestations, and outcomes of BB insertion. The PilBouTox® study was a 2-year prospective multicenter observational cohort study conducted by French poison control centers. All cases of button battery insertions were included. Cases of ingestion or a discovered Button battery in the feces were excluded. After insertion, patients were monitored for 21 days. Causes of insertion, clinical manifestations, medical management and outcome were recorded. We recorded 34 cases, 5 cases, and 1 case of buccal, nasal, and auricular BB insertion, respectively. No cases of ocular, rectal, or vaginal BB insertions were recorded. Children and older adults represented 88% and 3% of patients, respectively. The incidence of BB insertion was 3.4 cases/1,000,000 children/year. Mucosal erosion and necrosis were described 1 h and 12 h after BB insertion, respectively. In one case of nasal insertion, the BB was subsequently swallowed. All patients with quick BB extraction (less than 15 min) remained asymptomatic. No patients died or had sequelae during the 21 days of follow-up. BB insertion is rare. Local necrosis can appear within a few hours after the insertion. Long-term complications need to be monitored to avoid missing functional injuries.

Nasal insertion overall satisfaction with EUS-b (NOSE): evaluating the feasibility of transnasal diagnostic EUS-b.

Esophageal endoscopic ultrasound using an endobronchial ultrasound (EBUS) bronchoscope (EUS‑b) has become an important tool in many bronchoscopy units. The procedure is generally performed through the mouth and there are currently no studies published evaluating the feasibility of transnasal EUS-b nor comparing it to the transoral approach. We aimed to evaluate the technical feasibility, patient comfort and safety of transnasal EUS-b. A single-centre prospective study enrolling patients undergoing diagnostic EUS-b was conducted. Nasal insertion was attempted in all cases. Procedure difficulty and perceived patient's comfort were reported by the bronchoscopists. Comfort, overall satisfaction and willingness to repeat the procedure were reported by the patients. Data regarding demographics, procedure details, patients' comfort and overall satisfaction, histological analysis and final diagnosis were collected and analysed. A total of 119 patients were consecutively enrolled. Nasal insertion was successful in 87.4% and the mean duration of the procedure was 15.7 ± 4.9 minutes. No severe complications were reported. Procedure difficulty was usually graded as "simple" or "very simple" (71.4%). Mean values for bronchoscopists' assessment of patient comfort and patients' reported comfort were 4.2 and 4.1, respectively, on a 5-point scale. Only moderate correlation between these values was found (τb = 0.301, P = 0.001). Willingness to repeat transnasal EUS-b was very high (99.0%). Adequate samples were obtained in 88.5% of patients and overall diagnostic yield of EUS‑b needle aspiration was 85.9%. EUS-b is an effective procedure that can be performed safely through the nasal cavity without significant discomfort for the patient.

Avoidance of final monopositional vowels

Abstract A group of Arabic dialects in Yemen exhibit a velar k in the subject suffixes of the perfect paradigm. The 1sg subject suffix surfaces in the various dialects as -ku, -k or -kw. In addition, the vocalization of the base may or may not be colored with a round vocalic quality, depending on both the realization of the suffix and the verbal type faʿal or fiʿil. Based on inquiries among speakers from Lower Yemen, we propose a path of evolution that leads from -ku to the labialized -kw, to a “colored” stem, and finally to the grammaticalization of coloration and loss of labialization. Two pressures propel the passage between stages: a functional pressure to distinguish between 1sg and 2msg, and a phonological pressure to avoid monopositional final vowels. The phonological pressure is shown to also motivate palatalization in the 2fsg -ki ⇒ -ky (⇒ -š), as well as the effect of pre-pausal nasal insertion, viz. -ku ⇒ -kum# and -ki ⇒ -kiŋ#. We further show that final vowels resulting from the interaction of the subject suffixes with object clitics are phonologically long—even if phonetically neutralized—and hence they do not violate the phonological requirement. The formal theories of strict CV (Lowenstamm 1996, Scheer 2004) and Element Theory (Kaye et al. 1985) are used to explain the a-synchronized development in the different verbal patterns, as well as the extent of the phonological ban on monopositional vowels.

Efficacy of TnR Nasal Mesh for prevention of septal perforation during septoplasty

ObjectiveSeptoplasty has been reported as the most common cause of the septal perforation. The interposition of the graft materials between the flaps at the site of the tear may be helpful to decrease the likelihood of septal perforation. The purpose of this study was to investigate the efficacy of TnR Nasal Mesh on the prevention of septal perforation following septoplasty. MethodsAmong 46 patients had septal perforation after septoplasty, 35 patients were treated with TnR Nasal Mesh and 11 with autologous septal cartilage for bilateral mucosal tears at the corresponding area of the nasal septum. TnR Nasal Mesh or septal cartilage was placed between the injured mucoperichondrial flaps and confirmed in its original position at both sides under nasal endoscope. Objective endoscopic examination for septal mucosa status was evaluated between the patients who were treated with TnR Nasal Mesh or septal cartilage. ResultsTwenty patients (57.1%) showed complete bilateral mucosa healing and nine (25.7%) had unilateral healing after TnR Nasal Mesh insertion. However, complete bilateral and unilateral mucosa healing was observed in 4 (36.4%) and 1 patients (9.1%) treated with septal cartilage, respectively. Complete healing rate for septal perforation was significantly higher in TnR Nasal Mesh than in septal cartilage insertion (p=0.022). None of the patients showed complications or adverse reactions after TnR Nasal Mesh or septal cartilage treatment. ConclusionTnR Nasal Mesh insertion after bilateral septal mucosal tear during septoplasty reduces permanent septal perforation without an apparent adverse effect. Therefore, TnR Nasal Mesh may be a safe and effective graft material for the prevention of septal perforation following septoplasty.