Programme of work

BUREAU OF INDIAN STANDARDS

Medical Equipment and Hospital Planning Department

Programme of Work

MHD4 : Ear, Nose And Throat Surgery Instruments

Scope : To formulate Indian Standards for diagnostic, examining, surgical instruments, devices and implants used in Ear, Nose, Throat and Head & Neck Surgery, excluding specific instruments under the scope of MHD 01 “Surgical Instruments” and MHD 08 “Dentistry”.
Liaison :

Published Standards

SI. No.	IS No.	Title	Reaffirmation Details	No. of Amendments	Degree of Equivalence
1.	IS 10272 : 1982 Reviewed In : 2022	Specification for draffin suspension apparatus	January, 2022	1	Indigenous
2.	IS 10308 : 1982 Reviewed In : 2022	Tracheostomy Tubes and Guides, Cubley's Pattern	January, 2022	-	Indigenous
3.	IS 10344 : 2024	Davis-Boyle Gag Frame and Tongue Plates Specification First Revision		-	Indigenous
4.	IS 10725 : 2024	Myringotomy Knife Specification (First Revision)		-	Indigenous
5.	IS 10726 : 2024	Meatal Skin Incision Knife Specification (First Revision)		-	Indigenous
6.	IS 10786 : 2024	St. Clair Thomsons Rhinoscopic Mirror Specification (First Revision)		-	Indigenous
7.	IS 10846 : 2024	Killian's Pattern Nasal Speculum - Specification ( First Revision )		-	Indigenous
8.	IS 11318 : 1985 Reviewed In : 2022	Bronchoscope, Aspirating, Negus' Pattern	January, 2022	-	Indigenous
9.	IS 11319 : 1985 Reviewed In : 2022	Oesophagoscope, Negus' Pattern	January, 2022	-	Indigenous
10.	IS 12901 (Part 1) : 2024	Laryngeal Forceps Part 1 Fine Grasping Crocodile Jaws Straight Specification (First Revision)		-	Indigenous
11.	IS 12901 (Part 2) : 2024	Laryngeal Forceps Part 2 Oval Cup Specification (First Revision)		-	Indigenous
12.	IS 13169 : 1991 Reviewed In : 2022	Ent surgery instruments head mirror - Specification	January, 2022	-	Indigenous
13.	IS 13179 : 1991 Reviewed In : 2022	Ent Surgery Instruments - Tracheostomy Tubes, Chevaliar Jackson's Pattern	January, 2022	-	Indigenous
14.	IS 17407 : 2020	Digital Otoscope — Handheld Type		-	Indigenous
15.	IS 17750 (Part 7) : 2021 ISO 14708-7:2019	Implants for surgery Active implantable medical devices Part 7: Particular requirements for cochlear and auditory brainstem Implant Systems(First Revision)		-	Identical under dual numbering
16.	IS 3758 : 2018 Reviewed In : 2023	Hooks, aural - Specification (First Revision)	June, 2023	-	Indigenous
17.	IS 3760 : 2021	Probe, Aural, Jobson Horne’s Pattern — Specification (First Revision of IS 3760)		-	Indigenous
18.	IS 3788 : 2024	Aural Specula Specification First Revision		-	Indigenous
19.	IS 3799 : 2019 Reviewed In : 2023	Forceps, aural and nasal, crocodile action - Specification (First Revision)	June, 2023	-	Indigenous
20.	IS 3807 : 2024	Aural and Nasal Dressing Forceps Specification (Second Revision)		-	Indigenous
21.	IS 4487 : 2000 Reviewed In : 2023	ENT Surgery Instruments - Forceps, Tonsil Artery (Birkett's Pattern)	February, 2023	-	Indigenous
22.	IS 4488 : 2018 Reviewed In : 2023	Forceps, Tonsil Holding (Muck's and White's Patterns) Specification ( First Revision )	February, 2023	-	Indigenous
23.	IS 4489 : 2018 Reviewed In : 2023	Forceps, Nasal Turbinate, Luc’s — Specification ( First Revision )	February, 2023	-	Indigenous
24.	IS 4504 : 2018 Reviewed In : 2023	Forceps, peritonsillar - Specification (First Revision)	May, 2023	-	Indigenous
25.	IS 4514 : 2018 Reviewed In : 2023	Forceps, Tonsil Dissecting (Waugh's Pattern) - Specification ( First Revision )	February, 2023	-	Indigenous
26.	IS 4520 : 2018 Reviewed In : 2023	Forceps, Punch, Nasal Citelli's Antrum and Hajek's Sphenoidal— Specification (First Revision)	February, 2023	-	Indigenous
27.	IS 4959 : 2018 Reviewed In : 2023	Raspatory, Nasal, Howarth's— Specification (First Revision)	February, 2023	-	Indigenous
28.	IS 4994 : 1968 Reviewed In : 2023	Specification for Forceps, Redressing, Walsham's Right, Left and Straightening	February, 2023	1	Indigenous
29.	IS 5147 : 1969 Reviewed In : 2023	Examination Lamp with Bull's Eye Condenser (Floor Model)	March, 2023	-	Indigenous
30.	IS 5338 : 2024	Eustachian Catheter Specification First Revision		-	Indigenous
31.	IS 5377 : 1969 Reviewed In : 2023	Speculum, Nasal, Thudichum's	February, 2023	1	Indigenous
32.	IS 5412 : 1969 Reviewed In : 2023	Saws, Nasal, Joseph's Pattern	February, 2023	1	Indigenous
33.	IS 5720 : 2024	Mollison's Pattern Self-Retaining Mastoid Retractor Specification (First Revision)		-	Indigenous
34.	IS 5723 : 1970 Reviewed In : 2023	Specification for mallet with fluted handle for ENT surgery	February, 2023	2	Indigenous
35.	IS 5732 : 1970 Reviewed In : 2023	Gouge, Mastoid (Jenkins' Pattern)	February, 2023	1	Indigenous
36.	IS 5747 : 1970 Reviewed In : 2023	Retractor, Endaural (Lempert's Pattern)	February, 2023	1	Indigenous
37.	IS 6464 : 2000 Reviewed In : 2023	ENT Diagnostic Instruments - Tuning Forks (Gardiner Brown's Pattern)	February, 2023	-	Indigenous
38.	IS 6465 : 1972 Reviewed In : 2023	Trocar, Antral, with Cannula (Tilley Lichtwitz' Pattern)	February, 2023	1	Indigenous
39.	IS 6514 : 1972 Reviewed In : 2023	Nasal Cartilage Knife (Ballenger's Pattern)	February, 2023	1	Indigenous
40.	IS 7710 : 1975 Reviewed In : 2023	Snare, Tonsil, Eve's Pattern	February, 2023	-	Indigenous
41.	IS 7712 : 1975 Reviewed In : 2023	Curette, Adenoid, St. Clair Thomson's Pattern	February, 2023	-	Indigenous
42.	IS 7713 : 1975 Reviewed In : 2023	Retractor, Light Model, Weislander's Pattern	February, 2023	-	Indigenous
43.	IS 7756 : 1975 Reviewed In : 2023	Depressor, Tongue, Lack's Pattern	February, 2023	-	Indigenous
44.	IS 8093 : 1976 Reviewed In : 2023	Curette, Ballance's pattern	February, 2023	-	Indigenous
45.	IS 8094 : 2024	Cawthornes Pattern Cerumen Hook Specification First Revision		-	Indigenous
46.	IS 8128 : 2024	Farabeuf's Pattern Elevator Specification (First Revision)		-	Indigenous
47.	IS 8129 : 2024	Forceps - Tonsil Artery, Curved (Scotts Pattern) - Specification (First Revision)		-	Indigenous
48.	IS 8136 : 2024	Dundas Grant's Pattern Seeker Specification (First Revision)		-	Indigenous
49.	IS 8157 : 2024	Heath's Pattern Granulation Forceps Specification (First Revision)		-	Indigenous
50.	IS 8199 : 1976 Reviewed In : 2018	Tracheostomy Tubes, Fuller's Pattern	February, 2018	-	Indigenous
51.	IS 8315 : 1977 Reviewed In : 2023	Forceps, Redressing, Asch's Pattern	February, 2023	-	Indigenous
52.	IS 8316 : 1977 Reviewed In : 2021	Retractor, Hajek's Pattern	January, 2021	-	Indigenous
53.	IS 8327 : 1977 Reviewed In : 2021	Forceps, Nodule, Vocal, Chevalier Jackson's Pattern	January, 2021	-	Indigenous
54.	IS 8343 : 1977 Reviewed In : 2021	Forceps, Biopsy, Peterson's Pattern	January, 2021	1	Indigenous
55.	IS 8734 : 1978 Reviewed In : 2021	Forceps, Cutting and Removing Large Specimens, Chevalier Jackson's Pattern	January, 2021	-	Indigenous
56.	IS 8735 : 1978 Reviewed In : 2021	Tube, Suction, Yankauer's Pattern	January, 2021	-	Indigenous
57.	IS 8743 : 1994 Reviewed In : 2021	ENT surgery instruments - Forceps, direct bronchoscopy, with alligator jaws and tenaculum points, Irwin Moore's pattern	January, 2021	-	Indigenous
58.	IS 8825 : 1978 Reviewed In : 2021	Specification for cannula, suction irrigation with locking device, microlaryngeal	January, 2021	-	Indigenous
59.	IS 8837 : 1978 Reviewed In : 2021	Specification for suction tubes with stylet microlaryngeal surgery	January, 2021	-	Indigenous
60.	IS 8838 : 1978 Reviewed In : 2021	Specification for forceps, cup, straight, microlaryngeal surgery	January, 2021	-	Indigenous
61.	IS 8839 : 1978 Reviewed In : 2021	Specification for forceps,cup upwards, microlaryngeal surgery	January, 2021	-	Indigenous
62.	IS 8840 : 1978 Reviewed In : 2021	Specification for scissors, microlaryngeal surgery	January, 2021	-	Indigenous
63.	IS 9058 : 2024	Zoellner's Pattern Upward Cutting Knife Specification - (First Revision)		-	Indigenous
64.	IS 9059 : 2024	Zoellner's Pattern Downward Cutting Knife Specification (First Revision)		-	Indigenous
65.	IS 9479 : 2024	Shea's Pattern 25, 45, and 90 Angle Fenestra Hook for Ear Surgery - Specification (First Revision)		-	Indigenous
66.	IS 9480 : 2024	Shea's Pattern Left and Right Elevators For Ear Surgery - Specification (First Revision)		-	Indigenous
67.	IS 9526 : 2024	Crocodile Jaw Stapedectomy Scissors - Specification (First Revision)		-	Indigenous
68.	IS 9544 : 2024	Round Cup, Elongated Cup and Oval Cup Jaws Stapedectomy Forceps - Specification (First Revision)		-	Indigenous
69.	IS 9558 : 1980 Reviewed In : 2023	Specification for gauge, depth, ptfe (Teflon) piston	February, 2023	-	Indigenous
70.	IS 9564 : 2024	Serrated, Smooth and Mc Gee Wire Closing Jaws Stapedectomy Forceps - Specification (First Revision)		-	Indigenous
71.	IS 9718 : 1981 Reviewed In : 2023	Specification for jig, cutting, ptfe piston	February, 2023	-	Indigenous

Standards Under Develpoment

Projects Approved

SI. No.	Doc No	TITLE
No Records Found

Preliminary Draft Standards

SI. No.	Doc No	TITLE
No Records Found

Drafts Standards in WC Stage

SI. No.	Doc No	TITLE
1	MHD 4 (25256)	ENT Workstation
2	MHD 4 (25258)	Otology Drill
3	MHD 4 (25922) Revision of: IS 5412:1969	Specification for Saws Nasal Josephs Pattern
4	MHD 4 (25923) Revision of: IS 4994:1968	Specification for Forceps Redressing Walshams Right Left and Straightening
5	MHD 4 (25925) Revision of: IS 5377:1969	Specification for Speculum Nasal Thudichums
6	MHD 4 (25927) Revision of: IS 8093:1976	Specification for Curette Ballances Pattern
7	MHD 4 (25929) Revision of: IS 8315:1977	Specification for Forceps Redressing ASCHs Pattern
8	MHD 4 (25933) Revision of: IS 6465:1972	Specification for Trocar Antral With Cannula Tilley Lichtwitz Pattern
9	MHD 4 (25934) Revision of: IS 6514:1972	Specification for Nasal Cartilage Knife Ballengers Pattern
10	MHD 4 (25938) Revision of: IS 7756:1975	Specification For Depressor Tongue Lacks Pattern
11	MHD 4 (25979) Revision of: IS 13169:1991	ENT Surgery Instruments Head Mirror-Specification
12	MHD 4 (25980) Revision of: IS 10272:1982	Specification for Draffin Suspension Apparatus
13	MHD 4 (25984) Revision of: IS 10308:1982	Specification for Tracheostomy Tubes and Guides Cubleys Pattern
14	MHD 4 (25987) Revision of: IS 13179:1991	Ent Surgery Instruments -Tracheostomy Tubes Chevaliar Jack Sons Pattern-- Specification

Draft Standards Completed WC Stage

SI. No.	Doc No	TITLE
1	MHD 4 (19128) Revision of: IS 11319:1985	Oesophagoscope Negus Pattern Specification First Revision
2	MHD 4 (21279)	Fibrin Glue
3	MHD 4 (21280)	Grommet Specification
4	MHD 4 (25360) Revision of: IS 5147:1969	Specification For Examination Lamp With Bulls Eye Condenser Floor Model
5	MHD 4 (25494) Revision of: IS 7713:1975	Specification For retractor Light Model Weislanders Pattern

Finalized Draft Indian Standard

SI. No.	Doc No	TITLE
1	MHD 4 (21654) Revision of: IS 5723:1970	Mallets for ENT Surgery First Revision
2	MHD 4 (21659) Revision of: IS 9718:1981	PTFE Piston Cutting Jig First Revision
3	MHD 4 (21736) Revision of: IS 5747:1970	Lempert s Pattern Endaural Retractor Specification First Revision
4	MHD 4 (21743) Revision of: IS 6464:2000	ENT Diagnostic Instruments Part 1 Tuning Forks Section 1 Gardiner Brown s Pattern
5	MHD 4 (21830) Revision of: IS 9558:1980	PTFE Teflon Piston Depth Gauge Specification First Revision
6	MHD 4 (25394) Revision of: IS 4487:2000	ENT Surgery Instruments Forceps Tonsil Artery Birketts Pattern Specification

Finalized Draft Indian Standards under Print

SI. No.	Doc No	TITLE
No Records Found

Total Published Standards:69 Total Standards Under development : 25

Aspect Wise Report

Product:	71
Code of Practices :	0
Methods of Test :	0
Terminology :	0
Dimensions :	0
System Standard :	0
Safety Standard :	0
Others :	0
Service Specification :	0
Process Specification :	0
Unclassified :	0

Total :71

Annexure-I :List of Indian Standards Withdrawn/Superseded

SI. No.	IS No.	Title
1.	IS 12901 : 1990 Reviewed In : 2022	ENT surgery instruments - Laryngeal fine grasping forceps crocodile jaws straight - Specification
2.	IS 12911 : 1990 Reviewed In : 2022	ENT surgery instruments - Laryngeal forceps oval cup - Specification
3.	IS 5140 : 1969 Reviewed In : 2018	Specification for auriscope
4.	IS 5357 : 1969 Reviewed In : 2013	Metallic Ear Syringe
5.	IS 6463 : 1972 Reviewed In : 2023	Burs Antrum Tilley s Pattern
6.	IS 6469 : 1972 Reviewed In : 2013	Harpoon Trocar Tilley s Pattern
7.	IS 6470 : 1972 Reviewed In : 2013	Politzerization Apparatus Pritchard s pattern
8.	IS 7007 : 1973 Reviewed In : 2022	Specification for E E N T Eye Ear Nose And Throat diagnostic set
9.	IS 7282 : 1975 Reviewed In : 2023	Chisel Labyrinth Straight Lake s Pattern
10.	IS 7711 : 1975 Reviewed In : 2023	Curette Adenoid Beckmann s Pattern
11.	IS 8158 : 1976	Needle Eye Bowmans Pattern
12.	IS 8191 : 1976 Reviewed In : 2023	Retractor Pillar Anterior and Tonsil Enucleator Mollison s Pattern
13.	IS 8344 : 1977 Reviewed In : 2021	Snare Aural Glegg s Pattern
14.	IS 9014 : 1979 Reviewed In : 2021	Specification for Raspatory fine curved right Zoellner 39 s Pattern
15.	IS 9015 : 1979 Reviewed In : 2021	Raspatory Fine Curved Left Zoellner s Pattern
16.	IS 9016 : 1979 Reviewed In : 2021	Needle Fine Spear Pointed Curved Right Zoellner s Pattern
17.	IS 9017 : 1979 Reviewed In : 2021	Needle Fine Spear Pointed Curved Left Zoellner s Pattern
18.	IS 9060 : 1979 Reviewed In : 2021	Hook Small Zoellner s Pattern

Annexure-II :List of Indian Product Standards

SI. No.	IS No. & Year	Title
1.	IS 10272 : 1982 Reviewed In : 2022	Specification for draffin suspension apparatus
2.	IS 10308 : 1982 Reviewed In : 2022	Tracheostomy Tubes and Guides Cubley s Pattern
3.	IS 10344 : 2024	Davis-Boyle Gag Frame and Tongue Plates Specification First Revision
4.	IS 10725 : 2024	Myringotomy Knife Specification First Revision
5.	IS 10726 : 2024	Meatal Skin Incision Knife Specification First Revision
6.	IS 10786 : 2024	St Clair Thomsons Rhinoscopic Mirror Specification First Revision
7.	IS 10846 : 2024	Killian 39 s Pattern Nasal Speculum - Specification First Revision
8.	IS 11318 : 1985 Reviewed In : 2022	Bronchoscope Aspirating Negus Pattern
9.	IS 11319 : 1985 Reviewed In : 2022	Oesophagoscope Negus Pattern
10.	IS 12901 (Part 1) : 2024	Laryngeal Forceps Part 1 Fine Grasping Crocodile Jaws Straight Specification First Revision
11.	IS 12901 (Part 2) : 2024	Laryngeal Forceps Part 2 Oval Cup Specification First Revision
12.	IS 13169 : 1991 Reviewed In : 2022	Ent surgery instruments head mirror - Specification
13.	IS 13179 : 1991 Reviewed In : 2022	Ent Surgery Instruments - Tracheostomy Tubes Chevaliar Jackson s Pattern
14.	IS 17407 : 2020	Digital Otoscope Handheld Type
15.	IS 17750 (Part 7) : 2021 ISO 14708-7:2019	Implants for surgery Active implantable medical devices Part 7 Particular requirements for cochlear and auditory brainstem Implant Systems First Revision
16.	IS 3758 : 2018 Reviewed In : 2023	Hooks aural - Specification First Revision
17.	IS 3760 : 2021	Probe Aural Jobson Horne s Pattern Specification First Revision of IS 3760
18.	IS 3788 : 2024	Aural Specula Specification First Revision
19.	IS 3799 : 2019 Reviewed In : 2023	Forceps aural and nasal crocodile action - Specification First Revision
20.	IS 3807 : 2024	Aural and Nasal Dressing Forceps Specification Second Revision
21.	IS 4487 : 2000 Reviewed In : 2023	ENT Surgery Instruments - Forceps Tonsil Artery Birkett s Pattern
22.	IS 4488 : 2018 Reviewed In : 2023	Forceps Tonsil Holding Muck 39 s and White 39 s Patterns Specification First Revision
23.	IS 4489 : 2018 Reviewed In : 2023	Forceps Nasal Turbinate Luc s Specification First Revision
24.	IS 4504 : 2018 Reviewed In : 2023	Forceps peritonsillar - Specification First Revision
25.	IS 4514 : 2018 Reviewed In : 2023	Forceps Tonsil Dissecting Waugh 39 s Pattern - Specification First Revision
26.	IS 4520 : 2018 Reviewed In : 2023	Forceps Punch Nasal Citelli 39 s Antrum and Hajek 39 s Sphenoidal Specification First Revision
27.	IS 4959 : 2018 Reviewed In : 2023	Raspatory Nasal Howarth 39 s Specification First Revision
28.	IS 4994 : 1968 Reviewed In : 2023	Specification for Forceps Redressing Walsham 39 s Right Left and Straightening
29.	IS 5147 : 1969 Reviewed In : 2023	Examination Lamp with Bull s Eye Condenser Floor Model
30.	IS 5338 : 2024	Eustachian Catheter Specification First Revision
31.	IS 5377 : 1969 Reviewed In : 2023	Speculum Nasal Thudichum s
32.	IS 5412 : 1969 Reviewed In : 2023	Saws Nasal Joseph s Pattern
33.	IS 5720 : 2024	Mollison 39 s Pattern Self-Retaining Mastoid Retractor Specification First Revision
34.	IS 5723 : 1970 Reviewed In : 2023	Specification for mallet with fluted handle for ENT surgery
35.	IS 5732 : 1970 Reviewed In : 2023	Gouge Mastoid Jenkins Pattern
36.	IS 5747 : 1970 Reviewed In : 2023	Retractor Endaural Lempert s Pattern
37.	IS 6464 : 2000 Reviewed In : 2023	ENT Diagnostic Instruments - Tuning Forks Gardiner Brown s Pattern
38.	IS 6465 : 1972 Reviewed In : 2023	Trocar Antral with Cannula Tilley Lichtwitz Pattern
39.	IS 6514 : 1972 Reviewed In : 2023	Nasal Cartilage Knife Ballenger s Pattern
40.	IS 7710 : 1975 Reviewed In : 2023	Snare Tonsil Eve s Pattern
41.	IS 7712 : 1975 Reviewed In : 2023	Curette Adenoid St Clair Thomson s Pattern
42.	IS 7713 : 1975 Reviewed In : 2023	Retractor Light Model Weislander s Pattern
43.	IS 7756 : 1975 Reviewed In : 2023	Depressor Tongue Lack s Pattern
44.	IS 8093 : 1976 Reviewed In : 2023	Curette Ballance s pattern
45.	IS 8094 : 2024	Cawthornes Pattern Cerumen Hook Specification First Revision
46.	IS 8128 : 2024	Farabeuf 39 s Pattern Elevator Specification First Revision
47.	IS 8129 : 2024	Forceps - Tonsil Artery Curved Scotts Pattern - Specification First Revision
48.	IS 8136 : 2024	Dundas Grant 39 s Pattern Seeker Specification First Revision
49.	IS 8157 : 2024	Heath 39 s Pattern Granulation Forceps Specification First Revision
50.	IS 8199 : 1976 Reviewed In : 2018	Tracheostomy Tubes Fuller s Pattern
51.	IS 8315 : 1977 Reviewed In : 2023	Forceps Redressing Asch s Pattern
52.	IS 8316 : 1977 Reviewed In : 2021	Retractor Hajek s Pattern
53.	IS 8327 : 1977 Reviewed In : 2021	Forceps Nodule Vocal Chevalier Jackson s Pattern
54.	IS 8343 : 1977 Reviewed In : 2021	Forceps Biopsy Peterson s Pattern
55.	IS 8734 : 1978 Reviewed In : 2021	Forceps Cutting and Removing Large Specimens Chevalier Jackson s Pattern
56.	IS 8735 : 1978 Reviewed In : 2021	Tube Suction Yankauer s Pattern
57.	IS 8743 : 1994 Reviewed In : 2021	ENT surgery instruments - Forceps direct bronchoscopy with alligator jaws and tenaculum points Irwin Moore s pattern
58.	IS 8825 : 1978 Reviewed In : 2021	Specification for cannula suction irrigation with locking device microlaryngeal
59.	IS 8837 : 1978 Reviewed In : 2021	Specification for suction tubes with stylet microlaryngeal surgery
60.	IS 8838 : 1978 Reviewed In : 2021	Specification for forceps cup straight microlaryngeal surgery
61.	IS 8839 : 1978 Reviewed In : 2021	Specification for forceps cup upwards microlaryngeal surgery
62.	IS 8840 : 1978 Reviewed In : 2021	Specification for scissors microlaryngeal surgery
63.	IS 9058 : 2024	Zoellner 39 s Pattern Upward Cutting Knife Specification - First Revision
64.	IS 9059 : 2024	Zoellner 39 s Pattern Downward Cutting Knife Specification First Revision
65.	IS 9479 : 2024	Shea 39 s Pattern 25 45 and 90 Angle Fenestra Hook for Ear Surgery - Specification First Revision
66.	IS 9480 : 2024	Shea 39 s Pattern Left and Right Elevators For Ear Surgery - Specification First Revision
67.	IS 9526 : 2024	Crocodile Jaw Stapedectomy Scissors - Specification First Revision
68.	IS 9544 : 2024	Round Cup Elongated Cup and Oval Cup Jaws Stapedectomy Forceps - Specification First Revision
69.	IS 9558 : 1980 Reviewed In : 2023	Specification for gauge depth ptfe Teflon piston
70.	IS 9564 : 2024	Serrated Smooth and Mc Gee Wire Closing Jaws Stapedectomy Forceps - Specification First Revision
71.	IS 9718 : 1981 Reviewed In : 2023	Specification for jig cutting ptfe piston