Clinical investigation of flat panel CT following middle ear reconstruction: a study of 107 patients.

OBJECTIVES: After middle ear reconstruction using partial or total ossicular replacement prostheses (PORP/TORP), an air-bone gap (ABG) may persist because of prosthesis displacement or malposition. So far, CT of the temporal bone has played the main role in the diagnosis of reasons for postoperative insufficient ABG improvement. Recent experimental and clinical studies have evaluated flat panel CT (fpCT) as an alternative imaging technique that provides images with high isovolumetric resolution, fewer metal-induced artefacts and lower irradiation doses. METHODS: One hundred and seven consecutive patients with chronic otitis media with or without cholesteatoma underwent reconstruction by PORP (n = 52) or TORP (n = 55). All subjects underwent preoperative and postoperative audiometric testing and postoperative fpCT. RESULTS: Statistical evaluation of all 107 patients as well as the sole sub-assembly groups (PORP or TORP) showed a highly significant correlation between hearing improvement and fpCT-determined prosthesis position. FpCT enables detailed postoperative information on patients with middle ear reconstruction. CONCLUSIONS: FpCT is a new imaging technique that provides immediate feedback on surgical results after reconstructive middle ear surgery. Specific parameters evaluated by fpCT may serve as a predictive tool for estimated postoperative hearing improvement. Therefore this imaging technique is suitable for postoperative quality control in reconstructive middle ear surgery. KEY POINTS: • Flat panel CT offers advantages with regard to artefacts and radiation dose. • FpCT provides higher isovolumetric resolution of temporal bone and middle ear implants. • FpCT allows prediction of the postoperative hearing outcome in patients. • FpCT is an important tool for immediate postoperative quality control. • FpCT improves postoperative management of patients with complications following ossicular replacement.

[Ossiculoplasty with hydroxyapatite bone cement]. / Apport du ciment d'hydroxyapatite en ossiculoplastie.

OBJECTIVE: To analyze the results obtained with hydroxyapatite bone cement (HABC). PATIENTS: A total of 73 ossiculoplasties with HABC were evaluated. Ears were divided into 4 groups: Group 1: Reinforcement of the incudo-stapedial joint with HABC; Group 2: Reconstruction of an incus long process defect with HABC; Group 3: Partial ossicular reconstruction between stapes and malleus handle with HABC; Group 4: Reconstruction of stapes with mobile or fixed footplate with moderate or extensive incus long process erosion using a titanium piston glued to the incus remnant using HABC. RESULTS: The mean follow-up was 21 months. The percentage of postoperative average air-bone gap (ABG) < or = 20 dB for groups 1, 2, 3 and 4 were 100%, 95%, 83% and 91% respectively; for ABG < or = 10 dB: 90%, 71%, 50% and 50%. No complications related to HABC and extrusion occurred. CONCLUSION: Today, the use of HABC seems to help us improve our functional results and also to avoid extrusion. In our experience, ossiculoplastie with HABC seems to provide better and more stable functional results. HABC is safe and easy to use. The use of cement with or without biocompatible ossicular prostheses allows us to repair different types of ossicular defects whilst trying to conserve an anatomical and physiological ossicular chain. Reconstruction of the incus long process or incudo-stapedial joint defect with cement is preferable rather than using partial ossicular reconstruction with HABC.

Prognostic factors of long-term outcomes after ossiculoplasty using multivariate analysis.

The objective of the retrospective study is to investigate the prognostic factors of long-term outcomes following ossiculoplasty. The setting was a tertiary referral and academic center. The series consisted of 269 patients, who underwent ossiculoplasty by the same surgeon between 1989 and 2003 and were followed for more than 5 years. Postoperative hearing outcomes were considered successful, if the postoperative air-bone gap was <20 dB. Prognostic factors were analyzed using multivariate analysis with logistic regression. Successful hearing was achieved in 143 patients (53.2%). The presence of the stapes and primary surgery was significantly favorable predictive factors. Better knowledge of these predictive factors may contribute to improve the surgeon's judgement and the information given to the patients preoperatively.

Safety of tympanoplasty and ossiculoplasty performed by otorhinolaryngology trainees.

OBJECTIVE: This study aimed to examine the impact of trainee involvement in performing tympanoplasty or tympano-ossiculoplasty on outcomes. METHODS: A retrospective analysis was performed of a prospective database of all patients undergoing tympanoplasty and tympano-ossiculoplasty in a single centre during a three-year period. Patients were divided into three primary surgeon groups: consultants, fellows and residents. The outcomes of operative time, surgical complications, length of hospital stay, and air-bone gap improvement were compared among the groups. RESULTS: The study included 398 tympanoplasty and tympano-ossiculoplasty surgical procedures, 71 per cent of which were performed by junior trainees (residents). The junior trainee group was associated with a significantly longer surgical time, without adverse impact on outcomes. CONCLUSION: Trainee participation in tympanoplasty and tympano-ossiculoplasty surgery was associated with longer surgical time, but did not negatively affect the peri-operative course or hearing outcome. Therefore, resident involvement in these types of surgery is safe.

A new approach for malleus/incus fixation: no prosthesis necessary.

OBJECTIVE: To describe a novel approach to manage malleus/incus fixation. STUDY DESIGN: Retrospective review of 363 patients with conductive hearing loss operated on since 1996. SETTING: Academic tertiary referral center. PATIENTS: Three hundred sixty-three patients with conductive hearing loss, an intact tympanic membrane, and without history for chronic infection underwent middle ear exploration. Three hundred forty-three had otosclerosis and underwent laser stapedotomy; the remaining 20 patients had laser release of their malleus/incus fixation. INTERVENTION: Twenty patients are presented in this paper. Nineteen patients were diagnosed with malleus fixation before surgery. One patient had a total perforation and mobility of the ossicular chain was not verified preoperatively. This patient was, intraoperatively, noted to have complete ossicular fixation. Conductive hearing loss was identified using audiometry and tuning forks. Nineteen of the 20 patients had the diagnosis confirmed using micropneumotoscopy and noting immobility of the malleus. A transcanal approach was used, and the malleus/incus fixation was released using a laser. This space was expanded upon using a drill. A 1.5-2.0 mm space was created where the ossicular fixation existed, thereby reducing the likelihood of refixation. MAIN OUTCOME MEASURE: Audiometric studies before and after intervention were compared. One to seven years of follow up are provided. RESULTS: Preoperative air-bone gaps ranged from 18 dB to 51 dB and averaged 33 dB. Postoperative air-bone gaps ranged from 1-36 dB and averaged 13 dB. No patients have experienced refixation. There were two complications: one perforation requiring a tympanoplasty and one patient sustaining a 20 dB high-frequency sensorineural loss, most likely secondary to inadvertent drill contact to the ossicular chain. CONCLUSION: When fixation of the malleus and/or incus is found, treatment options exist. A common technique involves removal of the incus and head of the malleus and reconstruction with an incus interposition or a partial ossicular prosthesis. Another technique proposed by the senior author (M.D.S.) is maintenance of the normal anatomy and use of the potassium-titanyl-phosphate laser and drill to free the ossicles and widen the epitympanum. This series shows successful closure of the air-bone gap with this technique.

[Failure rate and revision surgery in ossiculoplasty with Kurz titanium prosthesis]. / Echecs et reprises chirurgicales après ossiculoplastie par prothèse en titane Kurz.

UNLABELLED: Despite its excellent biocompatibility, failures and in particular extrusion of the prosthesis have been described in ossiculoplasty with titanium prosthesis. OBJECTIVE: Report our experience with revision ossicular recontruction in ossiculoplasty with Kurz prosthesis. Identify causes of failure in ossiculoplasty using the titanium prosthesis. MATERIAL AND METHODS: Retrospective chart reviews were performed for 110 patients who had undergone titanium ossicular implants between November 1998 and 2002. All patients had undergone ossiculoplasty using titanium middle ear implants. Patients were divided into 2 groups: in group 1 patients underwent revision ossiculoplasty; in group 2 patients had a successful surgery at first stage. Anatomic and functional results have been studied in these two groups. Causes of failures were analysed. RESULTS: The overall failure rate was 20% (22/110). Twenty patients underwent revision ossiculoplasty. Nine primary failures were attributable to a short implant. Two extrusions were observed. At long term billow-up, the functional gain between the primary and revision ossiculoplasty was comparable. CONCLUSION: Revision ossiculoplasty is worthwhile for those patients who have failure of the titanium prosthesis in ossiculoplasty. A large cartilage graft interposition is necessary to prevent extrusion. The overall luxation rate observed in our series was mainly due to a too short prosthesis and we recommend now a reconstruction with longer prosthesis.

[Ossiculoplasty with titanium prosthesis]. / Osiculoplastia con prótesis de titanio.

OBJECTIVES: The goal of this study was to make a review of the patients who underwent ossicular chain reconstruction with titanium prosthesis during an eight-year period in our Department. METHODS: A retrospective study was made on the ossiculoplasty cases over a period of eight years in a Public Hospital District. The information was extracted by clinical process consultation. Between 1999 and 2008, 124 ossiculoplasties using Kurz(®) titanium prosthesis for chronic otitis media were performed (78 partial ossicular chain reconstructions and 46 total ossicular chain reconstructions). The single stage, staged and revision ossicular chain reconstruction were included in the analysis. All patients had a minimum of 6 month postoperative follow up (mean 3 years and 4 months). Comparisons of preoperative and postoperative pure tone averages were performed. Air-bone gap and implant extrusion rates were measured. The success of the reconstruction was defined as a postoperative air-bone gap (ABG) of 20 dB or better. RESULTS: Successful ossiculoplasty was obtained in 73,1% of partial ossicular reconstruction reconstructions and 30,4% of total ossicular chain reconstructions (P<.05). The postoperative pure-tone average air-bone gaps was 16 dB in partial reconstructions and 26,7 dB in total reconstructions (P<.05). There were five cases of prosthesis extrusion. CONCLUSIONS: The majority of the ossiculoplasties improved satisfactorily the hearing status. There was no difference in hearing results in one-stage and two-stage partial ossicular chain reconstruction, but there were better hearing results in the cases of two-stage total ossicular chain reconstruction.

Ossiculoplasty: a UK survey.

The aim of this study was to assess and quantify the current surgical practice of ossiculoplasty among British otolaryngology consultants, using a postal questionnaire. Ossiculoplasty is not a very common procedure. It is only performed by otologists with a special interest in ossiculoplasty. Among the 280 respondents (response rate 51.9 per cent), only 179 (63.9 per cent) performed ossiculoplasty. The majority of the consultants (86.5 per cent) used artificial prostheses, and 63.7 per cent used patients' own ossicles (autografts). Most of the consultants (77.6 per cent) performed ossiculoplasty with primary tympanoplasty surgery rather than with primary cholesteatoma surgery (46.3 per cent). The majority of the consultants (50.8 per cent) performed less than 10 ossiculoplasties per year. This is the first survey on ossiculoplasty surgery in the United Kingdom.