1. What data in particular will be shared?
   Response - Individual participant data that underlie the results reported in this article, after de-identification (text, tables, figures, and appendices).
   


2. What additional supporting information will be shared?
   Response -  Study Protocol
   Response - Clinical Study Report
   
   
3. Who will be able to view these files?
   Response - Anyone
   


4. For what types of analyses will this data be available?
   Response - Any purpose.
   


5. By what mechanism will data be made available?
   Response - Proposals should be directed to [patel.abhishek13@gmail.com].
   


6. For how long will this data be available start date provided 08-03-2025 and end date provided 08-08-2030?
   Response - Beginning 3 months and ending 5 years following article publication.
   


7. Any URL or additional information regarding plan/policy for sharing IPD? 
   Additional Information - Nil

Background-

The surgical procedure for Chronic Otitis Media Squamous (Active) can either be a canal wall up (CWU) or a canal wall down (CWD) procedure. Both procedures have their advantages and disadvantages. Disease eradication being the primary aim of the surgery, its important to achieve complete clearance of the disease from the middle ear and mastoid. The hidden/ difficult to reach areas include the sinus tympani, deep tip cells, sinodural angle cells and deep supratubal recess. Literature states, intraoperative residual cholesteatoma rates of 13% in CWU mastoidectomy operation and 11.8% in CWD mastoidectomy operation when using microscope.

In contemporary practice, most otologists favour CWU surgery as far as possible in order to preserve normal anatomy alongwith disease clearance. With the advent of modern technology with better illumination, better optics and better magnification this has been possible to a large extent.

 Traditionally the otomicroscope has been used for these procedures, however with the advent of endoscopes it has been demonstrated that previously hidden/ difficult areas have become more accessible and it’s the way ahead for these surgeries. The endoscope has been used for grommet insertion, tympanoplasty and few cases of mastoid surgeries. The proponents of endoscope state its advantage of better visualization and better maneuverability in comparison to otomicroscope. However, the exact role of an endoscope in mastoidectomy has not been established.

This study aims to study the effect of addition of endoscope to traditional microscopic surgery in our subset of patients. 

Purpose-

Primary Objective - To evaluate effect of addition of endoscope to microscopic surgery in terms of visualization of difficult areas, disease clearance from difficult areas and preservation of normal anatomy

Secondary Objective- To Evaluate the functional outcomes of in terms of disease progression and audiological outcomes