Biliary drains
Formula 418
A non-bioabsorbable tubular device intended to be implanted in an obstructed biliary duct (e.g., common bile duct) to maintain luminal patency; it is not intended for vascular implantation. It may be a mesh structure or a continuous tube and is made entirely of metal [e.g., high-grade stainless steel, cobalt-chrome (Co-Cr), nickel-titanium alloy (Nitinol)]. It may be expandable in situ (e.g., with a balloon catheter or self-expands) and disposable devices intended to assist implantation may be included.
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Where to buy Formula 418
Contact Cook Incorporated directly; they can quote, ship, or point you to the distributor for your country.
From cookmedical.com, checked October 2026.
No reply, or outside their markets? Send us a request and we route it to a rep or distributor for your country.
Formula 418 models and sizes
From the FDA Global Unique Device Identification Database. Confirm with the manufacturer's instructions for use.
| Model / catalog no. | Size | MRI | Status |
|---|---|---|---|
| G42914 | — | MR Conditional | Available |
| G42915 | — | MR Conditional | Available |
| G42916 | — | MR Conditional | Available |
| G42917 | — | MR Conditional | Available |
| G42918 | — | MR Conditional | Available |
| G42919 | — | MR Conditional | Available |
| G42920 | — | MR Conditional | Available |
| G42921 | — | MR Conditional | Available |
| G42922 | — | MR Conditional | Available |
| G42923 | — | MR Conditional | Available |
| G42924 | — | MR Conditional | Available |
| G42925 | — | MR Conditional | Available |
| G42926 | — | MR Conditional | Available |
| G42927 | — | MR Conditional | Available |
| G42928 | — | MR Conditional | Available |
| G42929 | — | MR Conditional | Available |
| G42930 | — | MR Conditional | Available |
| G42931 | — | MR Conditional | Available |
| G42932 | — | MR Conditional | Available |
| G42933 | — | MR Conditional | Available |
| G42934 | — | MR Conditional | Available |
| G42935 | — | MR Conditional | Available |
| G42936 | — | MR Conditional | Available |
| G42937 | — | MR Conditional | Available |
| G42938 | — | MR Conditional | Available |
| G42939 | — | MR Conditional | Available |
| G42940 | — | MR Conditional | Available |
| G42941 | — | MR Conditional | Available |
| G42942 | — | MR Conditional | Available |
| G42943 | — | MR Conditional | Available |
| G42944 | — | MR Conditional | Available |
| G42945 | — | MR Conditional | Available |
| G42946 | — | MR Conditional | Available |
| G42947 | — | MR Conditional | Available |
| G42948 | — | MR Conditional | Available |
| G42949 | — | MR Conditional | Available |
| G42950 | — | MR Conditional | Available |
| G42951 | — | MR Conditional | Available |
| G42952 | — | MR Conditional | Available |
| G42953 | — | MR Conditional | Available |
| G42954 | — | MR Conditional | Available |
| G42955 | — | MR Conditional | Available |
| G42956 | — | MR Conditional | Available |
| G42957 | — | MR Conditional | Available |
| G42958 | — | MR Conditional | Available |
| G42959 | — | MR Conditional | Available |
| G42960 | — | MR Conditional | Available |
| G42961 | — | MR Conditional | Available |
| G42962 | — | MR Conditional | Available |
| G42963 | — | MR Conditional | Available |
| G42964 | — | MR Conditional | Available |
| G42965 | — | MR Conditional | Available |
| G42966 | — | MR Conditional | Available |
| G42967 | — | MR Conditional | Available |
| G42968 | — | MR Conditional | Available |
| G42969 | — | MR Conditional | Available |
| G42970 | — | MR Conditional | Available |
| G42971 | — | MR Conditional | Available |
| G42972 | — | MR Conditional | Available |
| G42973 | — | MR Conditional | Available |
Procedures that use biliary drains
Frequently asked questions
What is Formula 418 used for?
A non-bioabsorbable tubular device intended to be implanted in an obstructed biliary duct (e.g., common bile duct) to maintain luminal patency; it is not intended for vascular implantation. It may be a mesh structure or a continuous tube and is made entirely of metal [e.g., high-grade stainless steel, cobalt-chrome (Co-Cr), nickel-titanium alloy (Nitinol)]. It may be expandable in situ (e.g., with a balloon catheter or self-expands) and disposable devices intended to assist implantation may be included.
Who makes Formula 418?
Formula 418 is made by Cook Incorporated. It is listed under biliary drainage catheters in our device library.
What sizes does Formula 418 come in?
The FDA device database does not list sizes for Formula 418. Check the instructions for use or ask a Cook Incorporated representative.
Is Formula 418 MRI safe?
The FDA device database lists Formula 418 as MR Conditional. Always follow the specific MRI conditions in the labeling.
Is Formula 418 FDA cleared?
Formula 418 is registered in the FDA's Global Unique Device Identification Database (GUDID).
How do I contact a Cook Incorporated sales representative?
Cook Incorporated has not listed representatives on LA Vascular yet. Visit the Cook Incorporated company page for contact details.
Models, sizes and MRI status come from the FDA Global Unique Device Identification Database (GUDID); descriptions marked "provided by the manufacturer" are reviewed before publishing. Not an endorsement; follow the manufacturer's instructions for use.