Inhibited postprandial retrograde cyclic motor pattern in the distal colon of patients with diarrhea-predominant irritable bowel syndrome.

Patients with irritable bowel syndrome (IBS) have recurrent lower abdominal pain, associated with altered bowel habit (diarrhea and/or constipation). As bowel habit is altered, abnormalities in colonic motility are likely to contribute; however, characterization of colonic motor patterns in patients with IBS remains poor. Utilizing fiber-optic manometry, we aimed to characterize distal colonic postprandial colon motility in diarrhea-predominant IBS. After an overnight fast, a 72-sensor (spaced at 1-cm intervals) manometry catheter was colonoscopically placed to the proximal colon, in 13 patients with IBS-D and 12 healthy adults. Recordings were taken for 2 h pre and post a 700 kcal meal. Data were analyzed with our two developed automated techniques. In both healthy adults and patients with IBS-D, the dominant frequencies of pressure waves throughout the colon are between 2 and 4 cycles per minute (cpm) and the power of these frequencies increased significantly after a meal. Although these pressure waves formed propagating contractions in both groups, the postprandial propagating contraction increase was significantly smaller in patients compared with healthy adults. In healthy adults during the meal period, retrograde propagation between 2 and 8 cpm was significantly greater than antegrade propagation at the same frequencies. This difference was not observed in IBS-D. Patients with IBS-D show reduced prevalence of the retrograde cyclic motor pattern postprandially compared with the marked prevalence in healthy adults. We hypothesize that this reduction may allow premature rectal filling, leading to postprandial urgency and diarrhea.NEW & NOTEWORTHY Compared with healthy adults this study has shown a significant reduction in the prevalence of the postprandial retrograde cyclic motor pattern in the distal colon of patients with diarrhea-predominant irritable bowel syndrome. We hypothesize that this altered motility may allow for premature rectal filling which contributes to the postprandial urgency and diarrhea experienced by these patients.

Civilian penetrating neck trauma at a level I trauma centre: A five-year retrospective case note review.

OBJECTIVES: To report the experience of civilian penetrating neck trauma (PNT) at a UK level I trauma centre, propose an initial management algorithm and assess the degree of correlation between clinical signs of injury, operative findings and radiological reports. DESIGN: Retrospective case note review. SETTING: UK level I trauma centre April 2012-November 2017. PARTICIPANTS: Three hundred ten cases of PNT were drawn from electronic patient records. Data were extracted on hard and soft signs of vascular or aerodigestive tract injury, clinical management, radiological imaging and patient outcomes. MAIN OUTCOME MEASURES: Patient demographics, mechanism of injury, morbidity and mortality. The correlation between clinical signs, and radiological reports to internal injury on surgical exploration. RESULTS: Two hundred seventy-one (87.4%) male and 39 (13.6%) female patients with a mean age of 36 years (16-87) were identified. The most common causes of injury were assault 171 (55.2%) and deliberate self-harm 118 (38%). A knife was the most common instrument 240 (77.4%). Past psychiatric history was noted in 119 (38.4%), and 60 (19.4%) were intoxicated. 50% were definitively managed in theatre with a negative exploration rate of 38%, and 50% were managed in ED. Pre-operative radiological reports correlated with operative reports in 62% of cases with venous injury the most common positive and negative finding. Multivariate correlation was r = 0.89, p = 0.045, between hard signs plus positive radiology findings and internal injury on neck exploration. CONCLUSIONS: Management of PNT by clinical and radiological signs is safe and effective, and can be streamlined by a decision-making algorithm as proposed here.

High-resolution impedance manometry characterizes the functional role of distal colonic motility in gas transit.

BACKGROUND: The colonic motor patterns associated with gas transit are poorly understood. This study describes the application of high-resolution impedance manometry (HRiM) in the human colon in vivo to characterize distal colonic motility and gas transit; (a) after a meal and (b) after intraluminal gas insufflation into the sigmoid colon. METHODS: HRiM recordings were performed in 19 healthy volunteers, with sensors positioned from the distal descending colon to the proximal rectum. Protocol 1 (n = 10) compared pressure and impedance prior to and after a meal. Protocol 2 (n = 9) compared pressure and impedance before and after gas insufflation into the sigmoid colon (60 mL total volume). KEY RESULTS: Both the meal and gas insufflation resulted in an increase in the prevalence of the 2-8/minute "cyclic motor pattern" (meal: (t(9) = -6.42, P<0.001); gas insufflation (t(8) = -3.13, P = 0.01)), and an increase in the number of antegrade and retrograde propagating impedance events (meal: Z = -2.80, P = 0.005; gas insufflation Z = -2.67, P = 0.008). Propagating impedance events temporally preceded antegrade and retrograde propagating contractions, representing a column of luminal gas being displaced ahead of a propagating contraction. Three participants reported an urge to pass flatus and/or flatus during the studies. CONCLUSIONS AND INFERENCES: Initiation of the 2-8/minute cyclic motor pattern in the distal colon occurs both following a meal and/or as a localized sensorimotor response to gas. The near-absence of a flatal urge and the temporal association between propagating contractions and gas transit supports the hypothesis that the 2-8/minute cyclic motor pattern acts as a physiological "brake" modulating rectal filling.

Triple Canal Occlusion for the Treatment of Intractable Menière's Disease.

OBJECTIVE: Menière's disease can be a debilitating condition but in most cases the symptoms are controlled by lifestyle changes and medical management. However, some patients remain symptomatic despite medical treatment and have the option of more invasive surgical treatments. Surgical intervention for Menière's includes a range of interventions from grommet insertion, intratympanic steroids/Gentamicin, endolymphatic sac decompression, labyrinthectomy, and vestibular neurectomy. A recently described technique involves the occlusion of all three semi-circular canals as an alternative in intractable Menière's disease. STUDY DESIGN: This is a case series of three patients who underwent triple canal occlusion for the treatment of intractable Menière's disease. SETTING: Patients were selected from those who were referred to Queen Elizabeth Hospital in Birmingham, a tertiary referral center. PATIENTS: Patients who were severely symptomatic despite medical treatment who were considering ablative therapy were offered the option of triple canal occlusion as an alternative. INTERVENTION: We report a series of Menière's patients treated by triple canal occlusion, describe the rationale behind this intervention, the surgical technique, and preliminary results. MAIN OUTCOME MEASURE: Each patient was followed up for a minimum of 2 years following the procedure. The main outcomes measures were the class of vertigo control and hearing threshold levels according to the American Academy of Otolaryngology-Head and Neck Surgery guidelines. RESULTS: Of the three patients, two were men and one was woman, the age range was 45 years to 61 years old. Two patients with unilateral disease achieved class A control whereas one patient with bilateral disease achieved class B control. Two patients who underwent the procedure had little or no effect to their hearing on the treated side however one patient suffered a 30 dB hearing loss on the operative side. CONCLUSIONS: Based on our limited experience and the early reports in the literature we consider that there are potential patient benefits for triple canal occlusion for intractable Menière's disease as an alternative to vestibular neurectomy due to the reduced morbidity and long-term efficacy.

Socio-demographic profile and its influences on rehabilitation in children undergoing revision cochlear implantation - MERF experience.

INTRODUCTION: Revision cochlear implant surgery (RIS) is an unusual and unfortunate event, but not an uncommon occurrence in today's time, with more and more children being implanted. It is accepted that a pediatric cochlear implant recipient may require one or two revision procedures during their lifetime. The indication of RIS can be due to a multitude of causes like trauma, device failure (hard failure or soft failure), infection at the implant site, electrode extrusion, device migration, magnet migration, and upgradation in the technology. Scenarios, where the child is deprived of hearing once again is worrisome for the family. And, they need financial and psychological assistance as well. AIMS AND OBJECTIVES: (1) To scrutinize the socio-demographic profile of children who underwent RIS. (2)To profile the social, intellectual, and economic backgrounds of these families. MATERIAL AND METHODS: A retrospective, observational, non-interventional, cohort study conducted at the Implantation otology department of Madras ENT Research Foundation (MERF), Chennai, Tamil Nadu, India. DATA COLLECTION: (1) Detailed medical records of all the children who satisfied the inclusion criteria were reviewed.(2)This was followed up by a telephonic interview with the guardian of the consenting patients, to obtain further data based on a customized questionnaire. SAMPLE SIZE: Of the 99 children who underwent RIS, 80 families consented to be part of the study. STATISTICAL ANALYSIS: (1) Cause of revision implant surgery and Family system Risk estimate.(2) Correlation of sex, family system, patient non-compliance to habilitation, and residential area with RIS.(3) Correlation of the residential area of the patient with completion of 1-year habilitation. RESULTS: A significant association observed between RIS and Sex (P = 0.03). A significant co-relation between patient non-compliance to habilitation and cause of revision implant surgery observed (P = 0.02). A significant co-relation was seen between residential area (Rural/Urban) and cause of RIS (P = 0.02). A statistically significant correlation seen with the residential area (Rural/Urban) of the child and completion of 1-year habilitation (P = 0.01). Uni-variant association was found between patients that have completed one year of habilitation, patient compliance, and modified Kuppuswamy Socio-Economic status. CONCLUSION: The current data has aided in refining our institutional management protocols and predicting high-risk candidates who may need revision surgery in the future. Based on the data, all cochlear implantees and their families especially in the lower socio-economic strata, are now being meticulously educated about device care, the possible reasons for failures, and the importance of timely re-intervention.

Transmastoid Occlusion Surgery for Superior Semicircular Canal Dehiscence Syndrome Improves Patient-Reported Quality-of-Life Measures and corrects cVEMP Thresholds and Amplitudes.

OBJECTIVE: To determine the pre- and postoperative clinical, audiological, vestibular, and patient-reported measures in patients undergoing transmastoid occlusion surgery for superior canal dehiscence syndrome (SCDS). STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral centre, UK. PATIENTS: All primary transmastoid occlusion surgeries for SCDS were included (tertiary centre, single-surgeon), January 2008 to July 2019. INTERVENTIONS: Transmastoid superior canal occlusion surgery for SCDS. MAIN OUTCOME MEASURES: We collated audiological (pure tone audiogram), vestibular (cervical vestibular evoked myogenic potentials [cVEMPs]), and patient-reported outcome measures (Dizziness Handicap Inventory and subjective symptom grading). RESULTS: Fifty-two patients (55 ears) met the inclusion criteria. Thirty-one (56%) were female. Mean age was 47 years (range 29-63) and mean follow-up of 11.2 months. Six patients had bilateral disease, four of whom underwent sequential, bilateral surgery.Autophony was the most frequent presenting symptom, improving in 92%.Significant improvements were self-reported in patients' autophony (p < 0.0001), pressure- and noise-induced dizziness (p < 0.0001 and p < 0.0001), aural fullness (p = 0.0159), pulsatile tinnitus (p < 0.0001), perceived hearing loss (p = 0.0058), and imbalance (p = 0.0303).Overall Dizziness Handicap Inventory scores reduced from 45.9 to 27.4 (p < 0.0001), and across all subgroups of functional (p = 0.0003), emotional (p < 0.0001), and physical handicap (p = 0.0005).A 6.4-dB HL improvement in the air-bone gap (500-1000 Hz) occurred (95% confidence intervals 3.3-9.4 dB HL, p < 0.0001). There were no dead ears. cVEMP thresholds, when recordable, normalized in all except two ears. CONCLUSIONS: Transmastoid occlusion is effective at improving patient-reported outcomes and normalizing cVEMP thresholds, though some symptoms, notably disequilibrium, persist to a variable degree.

Distinct patterns of myogenic motor activity identified in isolated human distal colon with high-resolution manometry.

BACKGROUND: Colonic high-resolution manometry (HRM) has been used to reveal discrete, propagating colonic motor patterns. To help determine mechanisms underlying these patterns, we used HRM to record contractile activity in human distal colon ex vivo. METHODS: Surgically excised segments of descending (n = 30) or sigmoid colon (n = 4) were immersed in oxygenated Krebs solution at 36°C (n = 34; 16 female; 67.6 ± 12.4 years; length: 24.7 ± 3.5 cm). Contractility was recorded by HRM catheters. After 30 minutes of baseline recording, 0.3 mM lidocaine and/or 1 mM hexamethonium were applied. Ascending neural pathways were activated by electrical field stimulation (EFS; 10 Hz, 0.5 ms, 50 V, 5-s duration) applied to the anal end before and after drug application. RESULTS: Spontaneous propagating contractions were recorded in all specimens (0.1-1.5 cycles/minute). Most contractions occurred synchronously across all recording sites. In five specimens, rhythmic antegrade contractions propagated across the full length of the preparation. EFS evoked local contractions at the site of stimulation (latency: 5.5 ± 2.4 seconds) with greater amplitude than spontaneous contractions (EFS; 29.3 ± 26.9 vs 12.1 ± 14.8 mm Hg; P = .02). Synchronous or retrograde propagating motor patterns followed EFS; 71% spanned the entire preparation length. Hexamethonium and lidocaine modestly and only temporarily inhibited spontaneous contractions, whereas TTX increased the frequency of contractile activity while inhibiting EFS-evoked contractions. CONCLUSIONS AND INFERENCES: Our study suggests that the propagated contractions recorded in the organ bath have a myogenic origin which can be regulated by neural input. Once activated at a local site, the contractions do not require the propulsion of fecal content to sustain long-distance propagation.

Practical and ethical issues for delivery of advanced ENT services in the Indian subcontinent: efforts to 'Bridge the Gap'.

PURPOSE OF REVIEW: The Indian healthcare industry, one of the largest in the world, caters for 1.3 billion people. The modern middle class addresses its needs by visiting private hospitals, which provide comprehensive services but at a high cost. The low socioeconomic individuals visit government hospitals where all basic services are available, but there is a struggle to provide advanced healthcare. In order to rectify this dichotomous approach, new initiatives are being implemented to provide uniform healthcare across the society. RECENT FINDINGS: Technological advancements have been rapid and modern methods have reached the shores of India at the same pace as in the western world. In otolaryngology, advanced services especially for restoration of hearing loss and multimodality treatments for head and neck cancers have been two areas where practical and ethical dilemmas have existed to provide the most optimal treatment at subsidized costs. This article explores these two areas as examples to understand the specific problems encountered in delivering advanced ENT care in a low-resource setting in a large populous country. SUMMARY: Introduction of government health insurance schemes have helped the poor to make use of advanced healthcare. The highlight of this scheme has been the inclusion of expensive interventions like cochlear and auditory brainstem implantation, whereby cost of the device, surgery and habilitation have all been delivered cost free for eligible children.

International Survey of Physicians' Perspectives on Percutaneous Endoscopic Gastrostomy Tube Feeding in Patients with Dementia and Review of Literature.

Percutaneous endoscopic gastrostomy (PEG) tube often remains to be used as a primary modality for feeding in patients with advanced dementia, perhaps due to misconceptions regarding the outcomes. Physicians' perceptions regarding the PEG tubes could be a significant contributing factor globally. A multidisciplinary approach involving the ethics committee can help address the issue. Our survey is focused on gauging physicians' perceptions regarding PEG tube utilization and its global impact on outcomes in dementia.

Inter-rater Reliability and Validity of Holgers Scores for the Assessment of Bone-anchored Hearing Implant Images.

OBJECTIVES: This study aims to review the utility and interassessor reliability of Holgers classification by simultaneously testing various professionals of the bone-anchored implant team for their impression of a series of randomized images. STUDY DESIGN: Retrospective review of a randomized series of bone-anchored implant fixture clinical photographs from the database at a tertiary referral university hospital. Raters were blinded to the contemporaneous Holgers grading assigned by the Clinical Nurse Specialist at initial assessment. Multivariate analysis was performed for correlation between scores for assessors and between grades of assessor. SETTING: Queen Elizabeth Hospital, Birmingham, UK a tertiary center for BAHIs. PATIENTS: Patients implanted from May 2012 until November 2014. MAIN OUTCOME MEASURE: Photographs of fixture sites of adult patients were taken following bone-anchored hearing implant surgery using either a tissue reduction (a split skin graft or linear incision technique was used) or tissue preservation approach, at 1 week, 6 months, and 12 months postoperatively. On a single occasion 263 images were reviewed by 10 assessors (2 consultants, 2 higher surgical trainees, 3 junior doctors, and 3 audiologists). Images were displayed at 10-second intervals and were scored by each assessor. Assessors were blinded to patient identity, time points and to each other's scores. Results were then compared against the real-time scoring of Holgers grades done by the BAHI specialist nurse to compare scores. RESULTS: Overall 227 (86.2%) images were with tissue reduction technique of which 110 (41.8%) were with linear incision and 117 (44.4%) were with a split skin graft (SSG); and 36 (13.6%) were with tissue preservation technique. Of these 263 images, 104 were at 1 week (39.5%), 70 were at 6 months (26.6%), and 89 were at 12 months (33.9%). The cumulative scores for each grade scored by blinding the time points were: 0 = 1132 (43.04%), total 1 = 995 (37.83%), total 2 = 346 (13.15%), total 3 = 141 (5.36%), total 4 = 16 (0.6%). 2630 data points had a variance of only 0.6415 for each nominal. Multivariate correlation between all assessors was r =0.7230 (Pearson's R). Correlations between consultants r=0.6317, higher surgical trainees r=0.7351, junior doctors r=0.7599, and audiologists r=0.7981.There is a good correlation (r=0.89) with no statistically significant differences between the SSG and linear incision groups (p>0.05), possibly suggesting Holgers score is comparable within both these tissue reduction techniques.There is a moderate correlation (r=0.58) with statistically significant differences between tissue preservation versus tissue reduction groups (p<0.05), possibly suggesting tissue preservation gives better results with lower Holgers scores than tissue reduction. CONCLUSION: Holgers scoring system is a reliable tool with respect to inter-rater variability across all levels of experience. Correlation was closer with audiologists and lesser experienced assessors.

Novel Minimal Access Bone Anchored Hearing Implant Surgery and a New Surface Modified Titanium Implant, the Birmingham Experience.

BACKGROUND: Bone anchored hearing implants (BAHI) are widely used and highly successful, accompanied with a high level of patient satisfaction across most techniques. A large UK teaching hospital switched from the previously used wide diameter titanium fixture and drilling system to the novel minimally invasive technique and laser ablated titanium implant. Before this change the rates of fixture failure and skin problems necessitating abutment change were 1% each. METHODS: Retrospective case note review of consecutive BAHI patients drawn from an electronic database between January 2015 and October 2016. RESULTS: Data from a total of 118 procedures were reviewed, with different combinations of surgical techniques and implant types. Sixty procedures were performed via the novel minimally invasive technique with 21 failures (35%). Fourty-eight modified minimally invasive technique procedures were performed with seven failures. In 64 of the procedures, laser ablated titanium fixtures were placed with 21 failures (32.8%). In 54 procedures wide diameter titanium fixtures were placed with eight failures (5%). CONCLUSION: Initial experience with the novel minimally invasive technique and laser ablated titanium fixture showed significantly higher failure rates than expected. This prompted a change to an open technique and subsequent abandonment of the laser ablated titanium fixture and custom drilling solution in our institution.

Expanding Access: Cost-effectiveness of Cochlear Implantation and Deaf Education in Asia.

OBJECTIVE: To determine the cost-effectiveness of cochlear implantation (CI) with mainstream education and deaf education with sign language for treatment of children with profound sensorineural hearing loss in low- and lower-middle income countries in Asia. STUDY DESIGN: Cost-effectiveness analysis. SETTING: Bangladesh, Cambodia, India, Indonesia, Nepal, Pakistan, Philippines, and Sri Lanka participated in the study. SUBJECTS AND METHODS: Costs were obtained from experts in each country with known costs and published data, with estimation when necessary. A disability-adjusted life-years model was applied with 3% discounting and 10-year length of analysis. A sensitivity analysis was performed to evaluate the effect of device cost, professional salaries, annual number of implants, and probability of device failure. Cost-effectiveness was determined with the World Health Organization standard of cost-effectiveness ratio per gross domestic product (CER/GDP) per capita <3. RESULTS: Deaf education was cost-effective in all countries except Nepal (CER/GDP, 3.59). CI was cost-effective in all countries except Nepal (CER/GDP, 6.38) and Pakistan (CER/GDP, 3.14)-the latter of which reached borderline cost-effectiveness in the sensitivity analysis (minimum, maximum: 2.94, 3.39). CONCLUSION: Deaf education and CI are largely cost-effective in participating Asian countries. Variation in CI maintenance and education-related costs may contribute to the range of cost-effectiveness ratios observed in this study.

Lateral semicircular canal osteoma presenting as chronic postaural fistula.

Temporal bone osteoma is an unusual pathology which can occur by birth or can be acquired and mostly involves the tympanomastoid segment of the temporal bone. Osteomas arising from the otic capsule are extremely rare, and there has been only one other report of a lateral semicircular canal osteoma in the literature. We report a similar case of an acquired lateral canal osteoma which presented as a chronic postaural fistula in an ear previously operated for paediatric cholesteatoma.

Ocular torsion responses to electrical vestibular stimulation in vestibular schwannoma.

OBJECTIVES: We determined if eye movements evoked by Electrical Vestibular Stimulation (EVS) can be used to detect vestibular dysfunction in patients with unilateral vestibular schwannoma (VS). METHODS: Ocular torsion responses to monaural sinusoidal EVS currents (±2 mA, 2 Hz) were measured in 25 patients with tumours ranging in size from Koos grade 1-3. For comparative purposes we also measured postural sway response to EVS, and additionally assessed vestibular function with the lateral Head Impulse Test (HIT). Patient responses were compared to age-matched healthy control subjects. RESULTS: Patients exhibited smaller ocular responses to ipsilesional versus contralesional EVS, and showed a larger asymmetry ratio (AR) than control subjects (19.4 vs. 3.3%, p < 0.05). EVS-evoked sway responses were also smaller in ipsilesional ear, but exhibited slightly more variability than the eye movement response, along with marginally lower discriminatory power (patients vs. controls: AR = 16.6 vs 2.6%, p < 0.05). The HIT test exhibited no significant difference between groups. CONCLUSIONS: These results demonstrate significant deficits in the ocular torsion response to EVS in VS patients. SIGNIFICANCE: The fast, convenient and non-invasive nature of the test are well suited to clinical use.

Melioidosis--a case series from south India.

Melioidosis is sporadically reported from various parts of India. We present a case series from south India, highlighting the varied manifestations of the disease. Seven cases of culture-proven melioidosis are presented in whom Burkholderia pseudomallei were isolated from aspirate or blood. Melioidosis had a varied presentation involving multiple abscesses in the soft tissues, liver, spleen, mediastinum and the subdural space. It presented as either acute fulminant sepsis or followed a chronic indolent course, mimicking tuberculosis. Most cases had predisposing risk factors such as diabetes and chronic alcoholism.