11C-methionine PET aids localization of microprolactinomas in patients with intolerance or resistance to dopamine agonist therapy.

PURPOSE: To assess the potential for 11C-methionine PET (Met-PET) coregistered with volumetric magnetic resonance imaging (Met-PET/MRCR) to inform clinical decision making in patients with poorly visualized or occult microprolactinomas and dopamine agonist intolerance or resistance. PATIENTS AND METHODS: Thirteen patients with pituitary microprolactinomas, and who were intolerant (n = 11) or resistant (n = 2) to dopamine agonist therapy, were referred to our specialist pituitary centre for Met-PET/MRCR between 2016 and 2020. All patients had persistent hyperprolactinemia and were being considered for surgical intervention, but standard clinical MRI had shown either no visible adenoma or equivocal appearances. RESULTS: In all 13 patients Met-PET/MRCR demonstrated a single focus of avid tracer uptake. This was localized either to the right or left side of the sella in 12 subjects. In one patient, who had previously undergone surgery for a left-sided adenoma, recurrent tumor was unexpectedly identified in the left cavernous sinus. Five patients underwent endoscopic transsphenoidal selective adenomectomy, with subsequent complete remission of hyperprolactinaemia and normalization of other pituitary function; three patients are awaiting surgery. In the patient with inoperable cavernous sinus disease PET-guided stereotactic radiosurgery (SRS) was performed with subsequent near-normalization of serum prolactin. Two patients elected for a further trial of medical therapy, while two declined surgery or radiotherapy and chose to remain off medical treatment. CONCLUSIONS: In patients with dopamine agonist intolerance or resistance, and indeterminate pituitary MRI, molecular (functional) imaging with Met-PET/MRCR can allow precise localization of a microprolactinoma to facilitate selective surgical adenomectomy or SRS.

The effect of topical xylometazoline on Eustachian tube function.

BACKGROUND: Topical nasal decongestants are frequently used as part of the medical management of symptoms related to Eustachian tube dysfunction. OBJECTIVE: This study aimed to assess the effect of topical xylometazoline hydrochloride sprayed in the anterior part of the nose on Eustachian tube active and passive opening in healthy ears. METHODS: Active and passive Eustachian tube function was assessed in healthy subjects before and after intranasal administration of xylometazoline spray, using tympanometry, video otoscopy, sonotubometry, tubo-tympano-aerodynamic-graphy and tubomanometry. RESULTS: Resting middle-ear pressures were not significantly different following decongestant application. Eustachian tube opening rate was not significantly different following the intervention, as measured by all function tests used. Sonotubometry data showed a significant increase in the duration of Eustachian tube opening following decongestant application. CONCLUSION: There remains little or no evidence that topical nasal decongestants improve Eustachian tube function. Sonotubometry findings do suggest that further investigation with an obstructive Eustachian tube dysfunction patient cohort is warranted.

Hearing outcomes of cochlear implant recipients with pre-operatively identified cochlear dead regions.

Objectives: To determine how patients who did not meet UK TA166 NICE criteria for cochlear implantation (CI) but were subsequently found to have cochlear dead regions (DRs) performed with CI.Methods: A retrospective review of medical records was performed on CI recipients: 152 controls and 40 in the DR group. Of these, 34 pairs were matched by pre-operative Bamford-Kowal-Bench (BKB) scores and compared.Results: The forty DR patients had a median age at implantation of 56 years. Their mean pre-operative BKB score of 23% increased to 78% after CI. Thirty-seven experienced improvements in BKB scores. In matched case-control analysis, the improvement in mean BKB score with CI was no different (p = 0.19) between the DR group and control group; a similar proportion of patients benefitted in each group.Discussion: This study is the largestreport to date of performance of patients with DRs, before and after CI. The DR group gain similar benefit as the controls.Conclusion: Patients with DRs, who did not meet TA166 NICE criteria, received the same benefit as those who did. TEN testing to detect DRs should be included in routine CI work-up where standard criteria are not met.

Investigating the effect of a nasal decongestant on post-adenotonsillectomy respiratory complications in 25 paediatric patients with obstructive sleep apnoea: a pilot study.

OBJECTIVE: Adenotonsillectomy is frequently performed for obstructive sleep apnoea, but is associated with post-operative respiratory morbidity. This study assessed the effect of paediatric Otrivine (0.05 per cent xylometazoline hydrochloride) on post-operative respiratory compromise. METHODS: Paediatric patients undergoing adenotonsillectomy for obstructive sleep apnoea were included. The control group (n = 24) received no intervention and the intervention group (n = 25) received intra-operative paediatric Otrivine during induction using a nasal patty. Post-operative outcomes included pain, respiratory distress signs and medical intervention level required (simple, intermediate and major). RESULTS: Post-operative respiratory distress signs were exhibited by 4 per cent of the Otrivine group and 21 per cent of the control group. Sixty-eight per cent of the Otrivine group required simple medical interventions post-operatively, compared to 42 per cent of the control group. In the Otrivine group, 4 per cent required intermediate interventions; none required major interventions. In the control group, 12.5 per cent required both intermediate and major interventions. Fifty per cent of the control group reported pain post-operatively, compared with 40 per cent in the Otrivine group. CONCLUSION: Intra-operative paediatric Otrivine may reduce post-operative respiratory compromise in paediatric patients undergoing adenotonsillectomy for obstructive sleep apnoea. A randomised controlled trial is required.

Physical outcome measures for conductive and mixed hearing loss treatment: A systematic review.

BACKGROUND: The number of potential options for rehabilitation of patients with conductive or mixed hearing loss is continually expanding. To be able to inform patients and other stakeholders, there is a need to identify and develop patient-centred outcomes for treatment of hearing loss. OBJECTIVE OF REVIEW: To identify outcome measures in the physical core area used when reporting the outcome after treatment of conductive and mixed hearing loss in adult patients. TYPE OF REVIEW: Systematic review. SEARCH STRATEGY: Systematic review of the literature related to reported physical outcome measures after treatment of mixed or conductive hearing loss without restrictions regarding type of intervention, treatment or device. EVALUATION METHOD: Any measure reporting the physical outcome after treatment or intervention of mixed or conductive hearing loss was sought and categorised. The physical outcome measures that had been extracted were then grouped into domains. RESULTS: The literature search resulted in the identification of 1434 studies, of which 153 were selected for inclusion in the review. The majority (57%) of papers reported results from middle ear surgery, with the remainder reporting results from either bone conduction hearing devices or middle ear implants. Outcomes related to complications were categorised into 17 domains, whereas outcomes related to treatment success was categorised into 22 domains. CONCLUSIONS: The importance of these domains to patients and other stakeholders needs to be further explored in order to establish which of these domains are most relevant to interventions for conductive or mixed hearing loss. This will allow us to then assess which outcome measures are most suitable for inclusion in the core set.

Validation of a new ENT emergencies course for first-on-call doctors.

BACKGROUND: First-on-call ENT cover is often provided by junior doctors with limited ENT experience; yet, they may have to manage life-threatening emergencies. An intensive 1-day simulation course was developed to teach required skills to junior doctors. METHODS: A prospective, single-blinded design was used. Thirty-seven participants rated their confidence before the course, immediately following the course and after a two-month interval. Blinded assessors scored participant performance in two video-recorded simulated scenarios before and after the course. RESULTS: Participant self-rated confidence was increased in the end-of-course survey (score of 27.5 vs 53.0; p < 0.0001), and this was maintained two to four months after the course (score of 50.5; p < 0.0001). Patient assessment and management in video-recorded emergency scenarios was significantly improved following course completion (score of 9.75 vs 18.75; p = 0.0093). CONCLUSION: This course represents an effective method of teaching ENT emergency management to junior doctors. ENT induction programmes benefit from the incorporation of a simulation component.

Imaging of the Eustachian tube and its function: a systematic review.

INTRODUCTION: The Eustachian tube is a complex and inaccessible structure, which maintains middle ear ventilation to facilitate transmission of sound from the tympanic membrane to the cochlea. A renewed interest in treatments for eustachian tube dysfunction has led to a demand for methods of imaging the Eustachian tube, and assessing tube opening non-invasively. This review aims to summarise the use of imaging in the anatomical assessment of the Eustachian tube, and to explore how radiological techniques can be used to assess tube function. METHODS: A systematic review of the literature was performed with narrative data analysis. RESULTS: With high-resolution images, the soft and bony anatomy of the Eustachian tube can be assessed in detail. CT and MRI are best suited to identifying features associated with obstructive or patulous Eustachian tube dysfunction, though true assessments of function have only been achieved with contrast enhanced radiographs and scintigraphy. A single modality has yet to provide a complete assessment. No test has entered routine clinical use, but further development and research is underway. CONCLUSION: Significant information can be gained from imaging the Eustachian tube, and as faster acquisition techniques are developed, it is possible that dynamic imaging of tubal opening could play an important role in the assessment of patients with ET dysfunction.

The Cambridge Otology Quality of Life Questionnaire: an otology-specific patient-recorded outcome measure. A paper describing the instrument design and a report of preliminary reliability and validity.

OBJECTIVE: The Cambridge Otology Quality of Life Questionnaire (COQOL) is a patient-recorded outcome measurement (PROM) designed to quantify the quality of life of patients attending otology clinics. DESIGN: Item-reduction model. A systematically designed long-form version (74 items) was tested with patient focus groups before being presented to adult otology patients (n. 137). Preliminary item analysis tested reliability, reducing the COQOL to 24 questions. This was then presented in conjunction with the SF-36 (V1) questionnaire to a total of 203 patients. Subsequently, these were re-presented at T + 3 months, and patients recorded whether they felt their condition had improved, deteriorated or remained the same. Non-responders were contacted by post. A correlation between COQOL scores and patient perception of change was examined to analyse content validity. SETTING: Teaching hospital and university psychology department. PARTICIPANTS: Adult patients attending otology clinics with a wide range of otological conditions. MAIN OUTCOME MEASUREMENTS: Item reliability measured by item­total correlation, internal consistency and test­ retest reliability. Validity measured by correlation between COQOL scores and patient-reported symptom change. RESULTS: Reliability: the COQOL showed excellent internal consistency at both initial presentation (a = 0.90) and 3 months later (a = 0.93). Validity: One-way analysis of variance showed a significant difference between groups reporting change and those reporting no change in quality of life (F(2, 80) = 5.866, P < 0.01). CONCLUSIONS: The COQOL is the first otology-specific PROM. Initial studies demonstrate excellent reliability and encouraging preliminary criterion validity: further studies will allow a deeper validation of the instrument.

Tests of Eustachian tube function: a review.

BACKGROUND: Eustachian tube (ET) dysfunction is a common but poorly understood cause of patient symptoms, and an important aetiological factor in the development of middle ear pathology. Despite this, there are no specific tests of ET function in widespread clinical use and no identified 'gold standard' with which to diagnose the disease. OBJECTIVE: This review aims to review the literature to identify currently available tests of ET function and, where possible, report on their accuracy. TYPE OF REVIEW: Narrative systematic review. SEARCH STRATEGY: MEDLINE, EMBASE, Biosis and the Cochrane library were searched and reference lists reviewed for relevant articles. EVALUATION METHOD: Tests in included studies were required to measure a physiological function of the ET, or play a role in the diagnosis of poor ET function. Significant variation in demographic characteristics, disease presentation and severity, and technological approaches only permitted narrative systematic review. RESULTS: While many tests of ET function have been developed, with some in routine clinical use, all have significant limitations. Published accuracy data are limited and of differing quality due to the variability incomparative tests, and the spectrum of otological disorders associated with ET dysfunction. CONCLUSIONS: Currently, no single test could be considered a 'gold standard' for the diagnosis of ET dysfunction, but there is some evidence that diagnostic accuracy can be improved by combining the results of different objective tests and patient-reported outcome measures. Further development of ET function tests is required to facilitate the accurate diagnosis of patients and allow outcome reporting for new interventions.

Outcome of translabyrinthine surgery for vestibular schwannoma in neurofibromatosis type 2.

OBJECTIVES: To analyse the long-term outcome of translabyrinthine surgery for vestibular schwannoma (VS) in neurofibromatosis type 2 (NF2). RESEARCH TYPE: Retrospective cohort study. SETTING: Two tertiary referral NF2 units. PATIENTS: One hundred and forty eight translabyrinthine operations for patients with VS were performed. Preoperative stereotactic radiotherapy had been performed on 12(9.4%) patients. RESULTS: Mean tumour size was 3.1 cm. Total tumour excision was achieved in 66% of cases, capsular remnants were left in 24% of cases, and subtotal excision was achieved in 5% and partial removal was achieved in 5%. The radiological residual/recurrence rate was 13.9%. The perioperative mortality was 1.6%. At 2 years postoperatively, facial function was expressed in terms of House-Brackmann score (HB): HB 1 in 53.4%, HB 1/2 in 61.3%, HB 1-3 in 83.2% and HB 4-6 in 16.8%. All nine patients who underwent surgery following failed stereotactic radiotherapy had HB 3 function or better. Among 9.5% of the cases, 14 facial nerves were lost during surgery and repaired using direct anastomosis or grafting. There was no tinnitus present preoperatively in 27% of the cases, and 22% of patients developed tinnitus postoperatively. In patients with preoperative tinnitus, 61% remained the same, 17% got it resolved and only in 21% it worsened. The preoperative hydrocephalus rate was 26%, and among 15% of the cases five ventriculo-peritoneal (VP) shunts were performed. The cerebrospinal fluid leak rate was 2.5%. Fifty-six patients underwent auditory brainstem implantation (ABI) and two patients had cochlear implant (CI) sleepers inserted. CONCLUSIONS: The management of patients with NF2 presents the clinician with a formidable challenge with many patients still presenting themselves late with the neurological compromise and a large tumour load. There is still an argument for the management by observation until the neurological compromise dictates interventional treatment particularly with the option of hearing rehabilitation with ABI or CI. The translabyrinthine approach provides a very satisfactory means of reducing the overall tumour volume.

Magnetic resonance imaging features of large endolymphatic sac compartments: audiological and clinical correlates.

OBJECTIVES: (1) To study the prevalence and characteristics of large endolymphatic sac internal compartments on thin-section T2- and T2*-weighted magnetic resonance imaging, and to relate these to other large endolymphatic sac magnetic resonance imaging features, and (2) to correlate the compartment imaging features, endolymphatic sac size and labyrinthine anomalies with the patients' clinical and audiological data. METHOD: Magnetic resonance imaging studies for 38 patients with large endolymphatic sac anomalies were retrospectively reviewed in a tertiary referral centre. Endolymphatic sac compartment presence, morphology and imaging signal were assessed. Endolymphatic sac size and labyrinthine anomalies were also recorded. Endolymphatic sac compartments and other imaging features were correlated with clinical and audiological data. RESULTS: Compartments were present in 57 per cent of the imaged endolymphatic sacs, but their presence alone did not correlate with other imaging features or clinical data. The endolymphatic sac : internal auditory meatus signal ratio was associated with a history of sudden or fluctuating hearing loss. Hearing loss correlated with opercular and extraosseous endolymphatic sac size measurements. A larger midpoint intraosseous endolymphatic sac size was associated with clear fluid loss at cochlear implantation. CONCLUSION: The magnetic resonance imaging characteristics of large endolymphatic sac compartments have been defined. The endolymphatic sac size and distal compartment signal should be recorded, as these provide prognostic information and assist the planning of appropriate interventions.

Electric acoustic stimulation of the auditory system: experience and results of ten patients using MED-EL's M and FlexEAS electrodes.

OBJECTIVE: To evaluate the hearing preservation rate and speech perception scores in patients with profound high frequency hearing loss and acoustically aidable low frequency hearing, managed with the MED-EL electric acoustic stimulation system referenced to the insertion depth of the electrode array. STUDY DESIGN: Retrospective data analysis. PARTICIPANTS AND SETTING: Ten patients implanted at the Auditory Implant Centre, Guy's and St Thomas's Hospital, London, UK. MAIN OUTCOME MEASURES: Pure tone audiometry, speech perception tests and electrode insertion depth angle. RESULTS: Postoperatively, functional hearing preservation allowing electric acoustic stimulation was achieved in eight patients and total preservation of residual hearing in five patients with follow-up periods of more than 12 months. Three of four (75%) patients with an insertion depth of >360 degrees had a threshold shift of >25 dB, and all four patients had a threshold shift of >10 dB. All patients with total hearing preservation had the electrode inserted up to 360 degrees at maximum. Overall, speech perception outcomes increased significantly and hearing impairment was significantly reduced after electric acoustic stimulation or electric stimulation alone as compared with the preoperative scores. CONCLUSION: Electric acoustic stimulation provides significant benefit to individuals with profound high frequency hearing loss. Studies with larger number of patients are needed to establish the optimal electrode insertion angle as well as to further analyse the benefit of electric acoustic stimulation.

Hydrogen peroxide aids assessment of pharyngeal closure after laryngectomy.

OBJECTIVE: Pharyngocutaneous fistula is a serious complication following total laryngectomy. We report a simple technique which is useful in assessing the adequacy of pharyngeal closure following total laryngectomy. METHOD: Installation of 1.5 per cent hydrogen peroxide into the oral cavity, while observing for leakage at the pharyngeal repair. RESULTS: We have found this technique to be useful in 22 patients undergoing total laryngectomy with pharyngeal resection and neck dissection. CONCLUSION: This method ensures that pharyngeal closure has been technically adequate.