510(k) · Cleared
ClearedSingle Use Preloaded Sphincterotome V
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Olympus Medical Systems Corp. · KNS Unit, Electrosurgical, Endoscopic (With Or Without Accessories)
Cleared on Apr 11, 2013 as substantially equivalent to K950166 (Olympus America, Inc., 1995) and 1 other predicate after a 238-day review. Its family tree reaches back 4 generations to 1991. 7 later devices descend from it.
- Decided
- Apr 11, 2013
- Review
- 238 days
- Class
- Class II
- Product code
- KNS
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 4 generations to K910722 (1991). 7 ancestors in all. 7 later devices descend from it, 2 citing it directly.
- Root · 4 generations backK910722 450CM Guide Wire for G.I. UseTerumo Corp. · 1991
- 3 generations backK971937 Climber - Partially Coated Guide Wire for Endoscopic UseTerumo Medical Corp. · 1997
- 2 generations backK021179 Disposable Guidewire, Models G-205-3545S & G-205-3545AOlympus Optical Co., Ltd. · 2002
- 1 generation backK091417 Single Use Guidewire, Models G-240-2527S, G-240-2545S, G-240-2527A…Terumo Corp. · 2009
- This deviceK122505 Single Use Preloaded Sphincterotome VOlympus Medical Systems Corp. · 2013
- Descendant · cites it directly · 4 of its ownK141991 Single Use Preloaded Sphincterotome V (Distal Wireguided); Single…Olympus Medical Systems Copr. · 2015 · Recalled
- Descendant · 2 generations on · 1 of its ownK192339 TeslaTome Bipolar Sphincterotome, Tesla Bipolar Active CordWilson-Cook Medical, Inc. · 2020
- Descendant · cites it directly · 1 of its ownK150142 Single Use Balloon Dilator V (with Knife)Olympus Medical Systems Corp. · 2015
- Descendant · 2 generations on · 0 of its ownK250945 Single Use Preloaded Sphincterotome V (Distal Wire Guided) (KD-VC600…Olympus Medical Systems Corp. · 2025 · Recalled
- Descendant · 3 generations on · 0 of its ownK243568 Teslatome Bipolar Sphincterotome; Tesla BiCord Active CordWilson-Cook Medical, Inc. · 2025 · Recalled
Showing 5 of 7 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 7 · See all- K141991Single Use Preloaded Sphincterotome V (Distal Wireguided); Single Use SPOlympus Medical Systems Copr. · 2015 · cites it directly4descendants
- K192339TeslaTome Bipolar Sphincterotome, Tesla Bipolar Active CordWilson-Cook Medical, Inc. · 2020 · 2 generations on1descendant
- K150142Single Use Balloon Dilator V (with Knife)Olympus Medical Systems Corp. · 2015 · cites it directly1descendant
- K250945Single Use Preloaded Sphincterotome V (Distal Wire Guided) (KD-VC600 Series); Single Use…Olympus Medical Systems Corp. · 2025 · 2 generations on0descendants
- K243568Teslatome Bipolar Sphincterotome; Tesla BiCord Active CordWilson-Cook Medical, Inc. · 2025 · 3 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −4 | K910722 | 450CM Guide Wire for G.I. Use | Terumo Corp. | 1991 | — |
| −3 | K971937 | Climber - Partially Coated Guide Wire for Endoscopic Use | Terumo Medical Corp. | 1997 | — |
| −2 | K021179 | Disposable Guidewire, Models G-205-3545S & G-205-3545A | Olympus Optical Co., Ltd. | 2002 | — |
| −1 | K091417 | Single Use Guidewire, Models G-240-2527S, G-240-2545S, G-240-2527A… | Terumo Corp. | 2009 | — |
| 0 (this device) | K122505 | Single Use Preloaded Sphincterotome V | Olympus Medical Systems Corp. | 2013 | — |
| +1 | K141991 | Single Use Preloaded Sphincterotome V (Distal Wireguided); Single Use SP | Olympus Medical Systems Copr. | 2015 | 3 |
| +2 | K192339 | TeslaTome Bipolar Sphincterotome, Tesla Bipolar Active Cord | Wilson-Cook Medical, Inc. | 2020 | — |
| +1 | K150142 | Single Use Balloon Dilator V (with Knife) | Olympus Medical Systems Corp. | 2015 | — |
| +2 | K250945 | Single Use Preloaded Sphincterotome V (Distal Wire Guided) (KD-VC600 Series)… | Olympus Medical Systems Corp. | 2025 | 16 |
| +3 | K243568 | Teslatome Bipolar Sphincterotome; Tesla BiCord Active Cord | Wilson-Cook Medical, Inc. | 2025 | 1 |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1995 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2015 | 2 | 0 |
| 2016 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2025 | 2 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in KNS? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new KNS device
- #1 K241271 Aqua Medical RF Vapor Ablation Systemscore 17.2 · 20 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K950166 | Olympus KD-6G1-9Q Wire Guided Papillotomu KnifeSummary page 1…Manufacturer Device Name 510(k) Number Olympus Medical Systems KD 6G1-90 Wire Guided K950166 Corp. Papillotomy Knife Terurno Corporation Single Use Guidewire… | 1995 |
| * | K091417 | Single Use Guidewire, Models G-240-2527S, G-240-2545S, G-240-2527A, G-240-2545A…Summary page 1…Wire Guided K950166 Corp. Papillotomy Knife Terurno Corporation Single Use Guidewire K091417 1/3… | 2009 |
What descends from it? (7)
2 later devices cite it directly; ranked here by how many devices descend from each in turn.
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 22 years and passes through 4 companies; a new generation was cleared every 6.4 years on median.
- 1 of the 7 ancestors has a recall of any class.
- Of its descendants, K141991 (Olympus Medical Systems Copr., 2015) has gone furthest, with 4 descendants of its own.
- 1 other device also cites its predicate K950166.
How does its category compare?
All KNS devicesKNS Unit, Electrosurgical, Endoscopic (With Or Without Accessories): FDA decisions, review times, recalls and adverse event reports over 20 years. 2013, this device’s year, is highlighted.
FDA decisions per year · KNS
11in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KNS
171in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KNS
14in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KNS
1,504in 2025
MAUDE reports naming product code KNS, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 1 | — | 3 | 164 |
| 2008 | 3 | 61 | 5 | 587 |
| 2009 | 3 | 212 | 2 | 1,027 |
| 2010 | 4 | 168 | 0 | 908 |
| 2011 | 1 | — | 2 | 860 |
| 2012 | 2 | — | 0 | 848 |
| 2013 | 2 | — | 0 | 449 |
| 2014 | 1 | — | 0 | 405 |
| 2015 | 3 | 252 | 0 | 406 |
| 2016 | 3 | 30 | 6 | 457 |
| 2017 | 3 | 48 | 1 | 446 |
| 2018 | 5 | 62 | 0 | 563 |
| 2019 | 7 | 66 | 0 | 668 |
| 2020 | 4 | 212 | 0 | 906 |
| 2021 | 4 | 139 | 41 | 814 |
| 2022 | 3 | 182 | 0 | 913 |
| 2023 | 9 | 83 | 0 | 976 |
| 2024 | 3 | 198 | 14 | 1,533 |
| 2025 | 11 | 171 | 0 | 1,504 |
| 2026 | 2 | — | 4 | — |
What is it indicated for?
These instruments (sphincterotomes and guidewires) have been designed to be used with an Olympus endoscope for papillotomy using high-frequency current. The preloaded guidewire is used for guiding and exchanging endoscopic accessories for biliary duct, including but not limited to the common bile, cystic, pancreatic and right and left hepatic ducts.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K122505 · printed Nov 6, 2026
Cite this page
510(k) Report. “K122505: Single Use Preloaded Sphincterotome V.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K122505
Report an extraction error
Are you the manufacturer?
Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026