--- title: "Grommet / Tympanostomy tube / Ventilation tube" description: "ENT notes on Grommet - materials used, features, types, indications, contraindications and complications." source: "The ENT Resident" author: "Dr. Mausumi Das" canonical_url: "https://www.theentresident.com/ent-notes-lectures/grommet-tympanostomy-tube-ventilation" categories: ["Short Questions in ENT", "Otology"] video: "https://www.youtube.com/watch?v=tNgwh78ZSpc" image: "https://media.theentresident.com/og-images/grommet-tympanostomy-tube-ventilation.png" --- # Grommet / Tympanostomy tube / Ventilation tube ENT notes on Grommet - materials used, features, types, indications, contraindications and complications. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=tNgwh78ZSpc ## ๐Ÿฆป Ventilation tubes / Grommet / Tympanostomy tubes ### ๐Ÿ”ฉ What is a Ventilation Tube? A **ventilation tube** is a **small hollow prosthetic tube**, open at both ends, inserted through a **surgically created myringotomy** in the tympanic membrane. #### ๐Ÿ“Œ Synonyms - Grommet - Tympanostomy tube - Pressure Equalizing (PE) tube โžก๏ธ It substitutes the **pressure-equalizing function of the Eustachian tube**. > What is the Purpose of Ventilation Tubes? --- ### ๐Ÿงช Materials Used in Ventilation tubes Commonly used materials: - Teflon (most common) - Silastic (silicone) - Stainless steel - Titanium - Gold - Polyethylene (less preferred) **๐Ÿงฌ Newer Tubes** - Bioabsorbable / bacteriostatic grommets - Made of **polylactic acid** > What coating is given to ventilation tubes to avoid biofilm formation? --- ### โญ Features of an Ideal Ventilation Tube 1. Biocompatibility 2. Chemical Stability 3. Mechanical Strength 4. Non adhesive Surface 5. Adequate Ventilation 6. Sterilizability > Explain each of the features of an Ideal Ventilation Tube. --- ### ๐Ÿ”„ Types of Ventilation Tubes Based on **duration of retention**, ventilation tubes are classified into: - Short term grommets - Long term grommets --- ### โณ Short Term Grommets #### ๐Ÿ“Œ Duration - Retained for **6-12 months** - **Spontaneous extrusion** - No manual removal required > What are the Indications of using Short term grommet? #### ๐Ÿ“Œ Materials - Teflon - Silicone - Polyethylene #### ๐Ÿ“Œ Features - Small and lightweight - Easily extruded by epithelial migration - Low risk of persistent perforation > Give examples of Short Term Grommets, and describe each one of them. --- ### ๐Ÿ•ฐ๏ธ Long Term Grommets #### ๐Ÿ“Œ Duration - Retained for **12โ€“24 months or longer** - Often require **manual removal** > What are the Indications of using Long term grommet? #### ๐Ÿ“Œ Materials - Silicone - Teflon - Titanium #### ๐Ÿ“Œ Features - Larger lumen (better long term patency) - Wider inner flange (prevents extrusion) - Higher risk of permanent TM perforation > Give examples of Long Term Grommets, and describe each one of them. --- ### โœ… Indications of Grommet Insertion - **Otitis Media with Effusion (OME)** โ€“ Primary Indication > What are the indications of Myringotomy and Grommet Insertion in Otitis Media with Effusion (OME)? - **Recurrent Acute Otitis Media** > What is Recurrent Acute Otitis Media? >๐Ÿ“˜ In my detailed notes, Iโ€™ve discussed an exhaustive list of Intraindications of Myringotomy and Grommet Insertion. --- ### ๐Ÿšซ Contraindications of Grommet Insertion #### โ— Absolute Contraindications - **Only hearing ear** - Intra tympanic **glomus tumor** #### โš ๏ธ Relative Contraindications - Acute otitis externa - Atrophic tympanic membrane > ๐Ÿ“˜ In my detailed notes, Iโ€™ve discussed an exhaustive list of Absolute and Relative Contraindications of Myringotomy and Grommet Insertion. --- ### โš ๏ธ Complications of Grommet Insertion #### ๐Ÿ› ๏ธ Intra operative - Bleeding - Tube displacement into middle ear - Ossicular injury #### โฑ๏ธ Early Post operative - Otorrhea (most common) #### ๐Ÿ•ฐ๏ธ Late Post operative - Persistent TM perforation > ๐Ÿ“˜ In my detailed notes, Iโ€™ve discussed an exhaustive list of Complications of Grommet Insertion. --- ### ๐Ÿ“Œ Viva Pearls - Most common tube: **Shepherd grommet** - Type B tympanogram in OME - Posteriorsuperior quadrant is avoided - Long-term tubes โ†‘ risk of permanent perforation - Unilateral OME in adults โ†’ rule out NPC --- ## About This Note This free ENT note on Grommet / Tympanostomy tube / Ventilation tube was written by Dr. Mausumi Das and is paired with a corresponding video lecture. Canonical page of this note: https://www.theentresident.com/ent-notes-lectures/grommet-tympanostomy-tube-ventilation When citing or referencing this content, please credit The ENT Resident and link to the canonical page above. ## Related Notes by Category - Short Questions in ENT: https://www.theentresident.com/ent-notes-lectures/category/short-questions-in-ent.md - Otology: https://www.theentresident.com/ent-notes-lectures/category/otology.md ## About The ENT Resident The ENT Resident is an educational website and resource library created by Dr. Mausumi Das (MS ENT) for ENT residents, ENT postgraduates preparing for exams, and MBBS students. Dr. Mausumi Das writes the notes, draws the diagrams, and records the lectures herself. Browse all ENT notes and lectures on The ENT Resident: https://www.theentresident.com/ent-notes-lectures.md ## Medical-use Boundary The ENT Resident provides educational material for medical learning and revision. 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