How to differentiate between the individual lumens of a multi-lumen catheter?

How do I differentiate between the individual lumen openings of a dual-lumen and multi-lumen catheter?

Whether a catheter is a dual-lumen or multi-lumen central venous catheter, there is basically an English labeling on each lumen of the catheter. See the diagram below.

One end of a double lumen catheter is labeled “distal, terminal, end, distal,” and some catheters are also labeled with a “D” on the connector; the other end is labeled “proximal, proximal, proximal, proximal, proximal” and some connectors are labeled with “D,” and the other end is labeled with “proximal, proximal, proximal, proximal, proximal, proximal, proximal. The other end is labeled “proximal, proximal, proximal, proximal” and some are labeled “P” on the fitting.

Three-lumen catheters, in addition to the ports labeled “D” and “P”, there is also a labeled “middle, middle, middle,” that is, the M end.

Four-lumen catheters are less commonly used, and according to the manual, the four lumens are labeled distal, proximal, middle1, and middle2.


Of course, the lumen through which the guidewire passes during catheterization is the “D” end of the opening at the end.

How do I differentiate the size of the lumens of a double-lumen or multi-lumen catheter?

The size of each lumen of a catheter can be distinguished according to the catheter model number “GA” labeled on the catheter (or G in some cases), which is the international unit of catheter outer diameter and is the opposite of the domestic unit, where a larger number indicates a thinner catheter and a smaller number indicates a thicker catheter. For example, the 14G end of the picture above is larger than the 16G end.

Common double-lumen and multi-lumen catheter cross-section structure.

The use of each lumen of double-lumen and multi-lumen catheters:

Choice of central venous catheter

Central venous catheters are available in single, double, triple, and quadruple lumen, although quadruple lumen is really rare in clinical practice. Single lumen models are 14G, 16G, 18G, and 20G; double lumen models are 4F, 5F, 7F, and 8F; triple lumen models are 5.5F, 7F, and 8.5F, and quadruple lumen models are commonly used with 8.5F.

F is the unit of catheter, originally is the unit of measurement of circumference, was invented by a French doctor, for the English abbreviation of French. 1F ≈ 0.33mm. 1F ≈ 0.33mm. F model designation is usually found in the oval tube is not completely regular, for example, irregular round double-lumen bronchial catheter, also named with F. G (gauge) for the Europe and the United States of America puncture needle product unit, the larger the G, the catheter, the finer, the larger the F, the catheter, the larger the F, the larger the F, the larger the F, the larger the F, the larger the F, the larger the F, the larger the F. The larger the G, the thinner the catheter, and the larger the F, the thicker the catheter.

2. Blood collection: use the proximal (i.e., the end labeled proximal) lumen for blood collection to minimize the risk of contamination of the blood sample with the infused drug:

3, Parenteral nutritional solution: use a separate chamber for infusion, which effectively reduces drug-drug interactions and reduces the risk of central venous catheter-associated infections;

4. Vasoactive drugs: infused through a central venous catheter, with vasoconstrictor drugs and vasodilator drugs infused in separate chambers.

Send us your ideas and we’ll get in touch with you within 24H!

Share this post!

Request A Quote