Mean Postoperative Pure-tone Average Research Articles

National study of hearing preservation rates and outcomes after cochlear implantation in Ireland

Objective To study the rate of hearing preservation and outcomes of hearing preservation candidates in a national cochlear implant centre. The HEARRING criteria was used. Methods All cochlear implant candidates with preserved low frequency pure tone average (PTA) were included. All patients underwent cochlear implantation using a standard ‘soft-surgery’ technique. PTA was assessed at switch-on, 3, 6, 9 and 12 months postoperatively. The primary outcome was hearing preservation at 12 months. Results Sixty six patients were included in the study between 2015 and 2020. Seventy one ears were implanted including 33 adults and 33 children with 5 bilateral implantations. Mean preoperative PTA was 74.8 dB (range 52.3–92 dB), mean postoperative PTA was 95.3 dB corresponding to a mean shift of 20.5 dB. In the adult population, HP rates were as follows: complete HP in 13%, partial HP in 39.1%, minimal HP in 30.4%, loss of hearing in 17.4%. In the paediatric population: complete HP in 20.7%, partial HP in 51.7%, minimal HP in 13.8% and loss of hearing in 13.8%. After the initial postoperative shift, there was no significant worsening of residual hearing during follow-up between 3 and 12 months. There were no significant prognostic factors for hearing preservation. Conclusion Hearing preservation rates using the HEARRING criteria are described. This study will help counselling and decision making in patients eligible for cochlear implantation with hearing preservation. Further studies are required to assess the performances and outcomes of electronatural and electroacoustic stimulation.

Endoscopic Ossiculoplasty for the Management of Isolated Congenital Ossicular Chain Malformation: Surgical Results in 16 Ears

The aim of this study is to describe the clinical characteristics and intraoperative findings and further evaluate the efficacy of endoscopic ossiculoplasty for the management of isolated congenital ossicular chain malformation. A retrospective study was performed on 16 ears (15 patients) with the isolated congenital ossicular chain malformation who underwent endoscopic ossiculoplasty in our department from May 2017 to January 2019. Endoscopic exploratory tympanotomy was conducted to check the ossicular chain; at the same time, endoscopic ossiculoplasty was performed depending on intraoperative findings. Air-conduction thresholds, bone-conduction thresholds, and air-bone gaps (ABGs) were measured before and after surgery, and the hearing outcome was assessed at 6 months postoperatively. The most common malformations of ossicular chain were the missing of the incus long process and stapes suprastructure. A serial assessment of the hearing status was conducted before and 6 months after surgery. It showed the mean postoperative pure-tone average (PTA) was significantly reduced, and the mean postoperative ABG was obviously closed, respectively (P < .001). The mean PTA gain was 36.3 ± 8.6 dB, and the ABG closure was 35.1 ± 8.3 dB; ABG closure to 20 dB or less and ABG closure to 10 dB or less were achieved in 14 cases (87.5%) and 5 cases (31.3%), respectively. No differences were observed in postoperative hearing outcome between type Ⅲ cases and type Ⅳ cases; however, cases with partial ossicular replacement prosthesis implantation showed a larger hearing gain (P = .049) and a higher proportion of postoperative ABG less than 10 dB (P = .021). No facial palsy and significant sensorineural hearing loss occurred; all patients completed the surgery without the need of canalplasty, and the chorda tympani nerve was preserved in all patients. This research showed endoscopic surgery was effective in the diagnosis and management of isolated congenital ossicular chain malformation; the endoscopic ossiculoplasty provides an alternative method to manage congenital ossicular chain malformation, with comfortable hearing outcome and the advantage of excellent vision and less invasion.

Audiologic Improvement Following MCF Approach for Spontaneous Cerebrospinal Fluid Leaks.

To determine the audiologic improvement after middle cranial fossa (MCF) approach to repair spontaneous cerebrospinal fluid (sCSF) leaks. Retrospective cohort study. Tertiary referral center. Twenty-four consecutive patients (27 ears) with temporal bone sCSF leak over a 4-year period. Patient age, sex, ethnicity, body mass index (BMI), location of CSF leak, recurrence of CSF leak, and presence of encephalocele(s) were recorded. Audiometric testing in patients undergoing MCF repair of temporal bone sCSF leak. Comparison of preoperative and postoperative pure-tone average (PTA), air-bone gap (ABG), and word recognition score (WRS) in the sCSF leak ear. Out of 27 ears, 55% had multiple tegmen defects and 82% had more than or equal to 1 encephaloceles. There were no recurrent CSF leaks at a median follow up of 4 months. The mean (SD) preoperative PTA and ABG were 40.58 [15.67] and 16.44 [6.93] dB, respectively. There was significant improvement in mean PTA (10.28 [8.01] dB; p < 0.001; Cohen d = 0.95) and ABG (9.31 [7.16] dB; p < 0.001; Cohen d = 0.88) after sCSF repair. Mean WRS improved (by 3.07 [6.11] %; p = 0.024; Cohen d = 0.46) from a mean preoperative WRS of 93.16 [9.34]% to a mean postoperative WRS of 96.26 [6.49]%. MCF approach for repair of sCSF leaks yields significant improvement in conductive hearing loss and is highly effective in management of the entire lateral skull base where multiple bony defects are often identified.

Cochlear Implantation in Patients With Neurofibromatosis Type 2.

To describe cochlear implantation (CI) outcomes in patients with neurofibromatosis type 2 (NF2). Retrospective case series. A multidisciplinary NF2 clinic at a university hospital. Patients with NF2 who underwent CI. Pre- and postimplantation audiometric data, including pure-tone average (PTA) and AzBio Sentence scores. Eight patients with NF2 underwent CI. The mean age at implantation was 28.6 years (range: 17-63 yr) and six were female. The average length of deafness before CI was 3.5 years (range: 0.3-10 yr). Two patients underwent previous microsurgical resection via middle fossa craniotomy and one patient was treated with stereotactic radiotherapy before CI. Two tumors were growing at the time of CI, five tumors were not growing for an average period of 3.8 years (range: 1-6 yr), and one tumor had undergone previous gross total resection. Mean preoperative unaided PTA was 103.1 dB (range: 81.3-115 dB) and all preoperative AzBio scores were 0% in the ear to be implanted. These improved to a mean postoperative PTA of 30.9 dB (range: 12.5-43.8 dB) and mean postoperative AzBio score of 20% (range: 0-82%) with an average follow-up length of 16.6 months (range: 1.4-27.6 mo). Data logging demonstrated that six patients were daily CI users and two were nonusers, one of whom had normal hearing in the contralateral ear. CI is an effective option for rehabilitating hearing loss in patients with NF2; however, patients with normal contralateral hearing or poor follow-up do not perform as well.

Hearing results of tympanoplasty with attic reconstruction vs. obliteration in attic cholesteatoma

INTRODUCTION: The aim of the study was to compare hearing results between tympanoplasty with attic wall reconstruction and attic obliteration. MATERIAL AND METHODS: A prospective study included 88 patients who were operated for chronic suppurative otitis media (CSOM) and cholesteatoma in the ENT Department University Clinic Center Banja Luka from 2006 to 2011. Analysis of variance (ANOVA) was conducted to assess the impact of two different techniques of tympanoplasty: attic wall reconstruction and attic wall obliteration on patients` hearing. Hearing outcome was measured comparing preoperative to postoperative pure-tone average (PTA) and postoperative air-bone gap (ABG). RESULTS: Cholesteatoma was found in 54 (61.4%) patients: 31 (35.2%) sinus cholesteatoma, 20 (22.7%) attic cholesteatoma, 3 (3.4%) tensa tympanic cholesteatoma, and 34 cases (38.6%) of CSOM. Lateral attic wall and ossicular chain reconstruction was performed in 33 cases with subsequent attic reconstruction if the long process of the incus and the incudo-stapedial joint were missing. A mixed between-within-subjects analysis of variance showed significant improvement of PTA postoperatively in comparison to preoperative levels: Wilk`s Lambda=0.33, F(1,86)=172.1, p<0.001. ANOVA showed significant improvement of ABG postoperatively in comparison to preoperative levels: Wilk`s Lambda=0.23, F(1,86)=286.3, p<0.001. Hearing improvement was measured in both cases, the ABG closure and mean PTA improvement was larger in the attic reconstruction compared to attic obliteration technique. CONCLUSION: Attic wall reconstruction with cartilage provides better postoperative hearing compared to attic obliteration. Attic reconstruction in revision cases for cholesteatoma recurrence is not recommended.

Pediatric Modified Radical Mastoidectomy: Open Cavity versus Periosteal-Temporofascial Flap Obliteration: An Analysis

Obliteration of the mastoid cavity leaves a smaller cavity with quicker as well as better healing. Chances of developing cavity granulations or infection are also reduced. Protection of the lateral semicircular canal by soft tissue obliteration also prevents vertigo episodes on exposure to cold air. This prospective study was to compare the results of pediatric modified radical mastoidectomy (MRM) in open mastoid cavities and cavities obliterated with periosteal-temporofascial swing flap at Manipal Teaching Hospital, Pokhara; a tertiary referral centre. The cohort comprised of 40 pediatric patients who underwent MRM between January 2012 and December 2014. They were divided into group 1 where mastoid cavity was kept open and group 2 where mastoid cavity was obliterated with periosteal-temporofascial swing flap plus medicated bone dust. Results in the 2 groups were assessed by comparing the time taken for mastoid cavity to become dry, incidence of vertigo on exposure to cold air, tympanic membrane graft status, mastoid cavity status and change in the pre-operative to post-operative pure tone average after 6 months. Statistical analysis was done with Statistical Package for Social Sciences (SPSS) version 16.0. Statistical significance was set at p<0.05. Group 1 vs. Group 2 results were as follows: Mean time taken for mastoid cavity to dry was 81.8 days vs. 30.1 days. Vertigo on exposure to cold air was present in 77.3% vs. 0%. Tympanic membrane graft status was intact in 72.7% vs. 100%. Mastoid cavity epithelialization was complete in 68.2% vs. 94.4%. Mastoid cavity granulations were present in 36.4% vs. 5.6%. Mastoid cavity healing rates were 63.6% vs. 94.4%. Residual cholesteatoma was seen in 4.5% vs. 0%. Excessive wax & keratin debris was present in 36.4% vs. 5.6%. External auditory canal opening was adequate in 86.4% vs. 94.4%. The mean post-operative pure tone average was 37.61 dB vs. 25.97 dB. Mean gain in pure tone average was 8.94 dB vs. 19.84 dB. None of the patients developed intra-cranial complications. Periosteal-temporofascial swing flap plus medicated bone dust obliteration of pediatric MRM cavity provides a dry and healed cavity in less time with better hearing when compared to an open MRM cavity.

Endoscopic exclusive transcanal approach to the tympanic cavity cholesteatoma in pediatric patients: Our experience

ObjectivesThe aim of the present study is to describe our experience in the management of tympanic cavity cholesteatoma in pediatric patients, treated with endoscopic exclusive transcanal approach. MethodsA chart review of clinical data and videos from the operations of 54 pediatric patients, undergoing surgery between January 2007 and December 2013, was made. Patients presenting with cholesteatoma involving the tympanic cavity (mesotympanum, epitympanum, protympanum and/or hypotympanum), with no mastoid involvement, were included in the first group and underwent an exclusive transcanalar endoscopic approach (TEA). In case of mastoid extension of the pathology, patients were included in the control group and underwent a canal wall up microscopic technique (CWU). ResultsIn this study, 34 males and 20 females, including 5 bilateral cases, giving a total of 59 ears, were reviewed. Median age was 9.6 years (range 4–16 years). 31 cholesteatomas underwent a TEA approach, while 28 underwent a CWU approach, based on inclusion criteria. No differences from congenital vs acquired form was made, due to the difficult to correctly distinguish always the two forms. The ossicular chain was preserved in 26.6% of patients (16 ears): 42% of patients (13 ears) undergoing a transcanal endoscopic approach and 10% of patients undergoing a canal wall up microscopic approach (3 ears) (P=0.006). Second look surgery was executed in 41.6% of patients (25 ears). In partial ossicular prosthesis reconstructions, the mean preoperative pure-tone average was 29.4dB, while the mean postoperative pure-tone average was 27.1dB, with a mean increase of 2.3dB. In total ossicular prosthesis reconstructions, the mean preoperative pure-tone average was 47.8dB, while the mean postoperative pure-tone average was 26.5dB, with a mean increase of 21.3dB. Recurrence rate was 12.9% (4 ears) for the transcanal endoscopic approach group and 17.2% (5 ears) for the canal wall up microscopic approach. Residual disease was present in 26.6%: 19.3% (6 ears) for the transcanal endoscopic approach group and 34.4% (10 ears) for the canal wall up microscopic approach. The mean follow up was 36 months (range 8–88). Kaplan–Meier analysis at 36 months showed a lower recurrence risk for the transcanal endoscopic approach compared with the canal wall up microscopic approach, but this data was not statistically significant (P=0.58). ConclusionThe transcanal endoscopic approach represents a feasible, minimally invasive and conservative technique for the management of pediatric middle ear cholesteatoma.

The Envoy Esteem Hearing System: Single Surgeon Experience

Objectives: (1) Review the results of patients undergoing Envoy Esteem implantation from December 2010 through December 2013. All procedures were performed by the same senior surgeon (S.J.M.). (2) Analyze results following implantation of the Envoy Esteem System to determine if patients achieved statistically significant improvement in pure tone average (PTA). Methods: Patients undergoing implantation at Loyola University Medical Center were analyzed regarding preoperative, postimplantation audiometric data, complications, infections, and revision surgery. Study design: Institutional review board approved, retrospective study. Results: A total of 109 Esteem related procedures were performed. Seventy-one primary implants were performed. A total of 51 were male and 20 were female. A total of 29 revision cases were performed. Additionally, 9 patients were explanted and 9 cases were aborted prior to implantation. The average age of the implant population was 62.8 years old. The average length of follow-up was 20 months. A total of 43 primary implant patients had sufficient data available for analysis. The mean preoperative PTA was 63.4 dB and the mean postoperative PTA was 50.7 dB. Patients demonstrated a 9.90 dB average increase in PTA. A paired t test was used to determine if the difference was statistically significant. The difference proved to be statistically significant with a t-stat of 5.87, which was statistically significant at the .05 level of confidence. Conclusions: Initial results of The Envoy Esteem system demonstrated a significant hearing benefit in our study population. The revision surgery rate of 26.6% is concerning and patients need to be aware of this potential issue.

Pediatric ossiculoplasty with titanium total ossicular replacement prosthesis.

To assess the medium-term efficacy of total ossicular reconstruction with a titanium total ossicular replacement prosthesis (TORP) in children. Case series. A consecutive series of children receiving an adjustable-length titanium TORP was identified from a prospective surgical and audiological database. Audiometric testing was obtained preoperatively, 2 months postoperatively, and subsequently at 6- to 12-month intervals. Four-frequency pure-tone averages (PTA) were determined for air conduction (AC) and bone conduction thresholds, as well as air-bone gap (ABG). Pre- and postoperative measures were compared to determine degree of improvement. The proportion with successful outcome (defined as ≤ 30 dB hearing level [HL] AC) was determined over time with Kaplan-Meier analysis. Seventy-five TORPs were inserted in 71 children aged 7 to 18 years, with a median follow-up of 2.7 years (0.6-5.5 years). The mean postoperative PTA AC threshold and ABG at 1 year were 35 dB HL and 29 dB, respectively, with ABG closure of 14 dB. The maximum gain in AC was 40 dB, achieved in eight (11%) cases. Successful outcome was seen in 50% of children at first follow-up. Over the following 1 to 3 years, hearing levels deteriorated to AC > 30 dB HL in an additional 10% of patients. Four patients had revision surgery, one for prosthesis extrusion and three for a lack of improvement in hearing. Titanium TORPs offer children an effective method of ossicular reconstruction, with infrequent extrusion at least in the short term. The hearing improvement achieved in the early postoperative period appears to be maintained over the first year but may not be sustained over longer time periods.

Hearing Results Post Tympanoplasty: Our Experience with Adults at the KKR ENT Hospital, India.

Chronic suppurative otitis media is often associated with some degree of hearing loss. Tympanomastoid surgery is considered effective in controlling infection and preventing recurrence. However, opinions differ with regards the post-operative hearing results. This study aims to assess the hearing results, and also ascertain the effects of some variables on hearing in adult patients with chronic suppurative otitis media after primary tympanoplasty. This was a retrospective review of the clinical records of adult patients with chronic suppurative otitis media, who had primary tympanoplasty at the KKR ENT Hospital and Research Institute in Chennai (India), between 1st June and 30th September, 2011. A total of 26 adult patients with a mean age of 35.85years (SD 14.775) were studied. There were 16 males (61.54%) and 10 females (38.46%). The commonest presenting symptoms were ear discharge (80.8%) and hearing loss (76.9%); and the mean duration of symptom was 8.52years (SD 8.599). The overall mean pre-operative pure tone average was 49.58dB (SD 18.608), while the overall mean post-operative pure tone average was 37.38dB (SD 17.837). The difference between the overall mean pre- and post-operative pure tone average (hearing gain) was 12.192dB (SD 12.924); and this was found to be statistically significant (p<0.05). Multiple linear regression model showed that only increasing age was significantly associated with increasing mean post-operative pure tone average. This study found primary tympanoplasty effective in improving hearing results in adults with chronic suppurative otitis media even in those with advanced ossicular lesions.

Vibrant Soundbridge vs BAHA: Outcomes Comparison

Objective1) Evaluate results of the implant Vibrant Soundbridge vs BAHA in conductive or mixed deafness. 2) Compare audiological and satisfaction outcomes.MethodRetrospective study of 50 patients with mixed or conductive deafness. Twenty‐five patients using VSB, 25 using BAHA.ResultsWith VSB 46% were men, and the age at implantation was 39 years (SD, 15 years). A total 96% of cases FMT were placed on the round window. Mean postoperative pure tone average without VSB was 69 (±17) dB HL and with VSB in free‐field condition 33 (±17) dB HL. Mean hearing gain was 34 (±17) dB HL. When comparing with the BAHA users’ group, the hearing gain was 38 (±14), and there were no statistical differences, P =. 37.ConclusionVSB is an efficient alternative for patients with conductive‐mixed hearing losses, comparable to bone anchored hearing device. The use of the FMT on the round window has demonstrated to be effective in well‐selected cases.

Congenital external auditory canal stenosis and partial atretic plate

Objectives To report outcomes of surgery for severe congenital external auditory canal (EAC) stenosis with or without partial atretic plate (PAP). Design Retrospective review. Subjects Thirteen patients (18 ears) had surgery for severe EAC stenosis with ( n = 10, 56%) or without PAP ( n = 8, 44%). Indications included severe stenosis with hearing loss, cerumen impactions, and/or canal cholesteatoma. Mean age = 7.8 years (range 0.4–19.9 years). Mean follow up = 5.2 years (range 0.4–10.0 years). Setting Tertiary care children's hospital. Interventions Nineteen endaural canaloplasties were performed in 17 ears (2 revisions). There was one post-auricular approach. Fifteen tympanoplasties were performed in 13 ears (2 revisions). PAP was reconstructed with drilling to enlarge the bony annulus and fascia grafting to enlarge the tympanic membrane in 10 (56%) ears. Outcome measures Patency of EACs; otologic findings; pure tone averages (PTA); complications. Results All (100%) EACs had improved patency (≥4 mm). Findings included canal cholesteatoma (2/18, 11%), ossicular fixation (4/18, 22%), stapes abnormality (2/18, 11%), and incudostapedial discontinuity from cholesteatoma (1/18, 6%). Mean preoperative PTA = 38.7 dB HL (range 60–20 dB HL). Mean post-operative PTA = 23.6 dB HL (range 50–6.7 dB HL). Audiologic results were significantly better for cases without PAP ( p < .01) and without ossicular fixation ( p < .01). There were seven minor and no major complications. Conclusions Endaural canaloplasty is safe and effective for providing patent EACs and hearing improvement for severe congenital EAC stenosis. However, since hearing outcomes were worse for cases with PAP and ossicular fixation, alternatives such as hearing aids or BAHA ® may be considered.

Microvascular decompression of the vestibulocochlear nerve for disabling positional vertigo: the House Ear Clinic experience.

To review characteristics of and outcome in patients undergoing microvascular decompression of the vestibulocochlear nerve. Patients studied had a diagnosis of disabling positional vertigo caused by a vascular loop compressing the VIIIth cranial nerve. Retrospective chart review and telephone interview. Private practice tertiary neurotologic referral center. Twenty patients with disabling positional vertigo underwent 25 retrosigmoid craniotomies for microvascular decompression between November 1990 and June 1999. The 4 men and 16 women ranged in age from 30 to 71 years (mean age, 46 yr). Charts were reviewed and patients were contacted by telephone and asked to rate severity of symptoms (tinnitus and dizziness) on a 4-point scale (none = 1, mild = 2, moderate = 3, and severe = 4) before and after surgery. They were also asked to rate their overall disability from their symptoms on the six-point scale established by the American Academy of Otolaryngology-Head and Neck Surgery. Preoperative and postoperative four-frequency (500 Hz, 1 kHz, 2 kHz, and 4 kHz) pure-tone average and speech discrimination scores were calculated and compared. Complications of surgery are also reported. Postoperative tinnitus score and dizziness score showed significant improvement from preoperative scores (p < or = 0.047 and p < or = 0.001, respectively), with 80% of patients improved in dizziness rating; 85% improved in their overall disability rating, and the difference from preoperative to postoperative was significant (p < or = 0.001). The mean postoperative pure-tone averages (15.4 dB) and speech discrimination scores (99%) did not differ from preoperative scores (11.9 dB and 98%). One patient lost all vestibular function in the operated ear (hearing remained intact) as the only complication of surgery. When asked, 83% of patients responded that they would have the surgery again. Diagnosing disabling positional vertigo secondary to vascular compression of the VIIIth cranial nerve remains the clinical challenge; a clear history plus air-contrast computed tomographic or magnetic resonance imaging make the diagnosis. Microvascular decompression of the vestibulocochlear nerve is a safe and effective operation for these carefully selected patients.

Modification of auditory pathway functions in patients with hearing improvement after middle ear surgery

We recorded auditory-evoked magnetic responses with a whole-scalp 122-channel neuromagnetometer from seven adult patients with unilateral conductive hearing loss before and after middle ear surgery. The stimuli were 50-msec 1-kHz tone bursts, delivered to the healthy, nonoperated ear at interstimulus intervals of 1, 2, and 4 seconds. The mean preoperative pure-tone average in the affected ear was 57 dB hearing level; the mean postoperative pure-tone average was 17 dB. The 100-msec auditory-evoked response originating in the auditory cortex peaked, on average, 7 msecs earlier after than before surgery over the hemisphere contralateral to the stimulated ear and 2 msecs earlier over the ipsilateral hemisphere. The contralateral response strengths increased by 5% after surgery; ipsilateral strengths increased by 11%. The variation of the response latency and amplitude in the patients who underwent surgery was similar to that of seven control subjects. The postoperative source locations did not differ noticeably from preoperative ones. These findings suggest that temporary unilateral conductive hearing loss in adult patients modifies the function of the auditory neural pathway. (Otolaryngol Head Neck Surg 1998;119:125-30.)