Communication Between Vascular Catheter Lumens: Safety Implications

ABSTRACT

In this case, we report a rare manufacturing defect in a multi-lumen central venous catheter, where communication between lumens was discovered during a pre-use flush check. This defect raises significant safety concerns, including potential medication interference and inaccurate CVP readings. Vigilant pre-use testing and heightened awareness of such anomalies are crucial to preventing life-threatening complications.

INTRODUCTION

Central venous catheterization is an invasive procedure that is widely used in the operating room and intensive care units for the measurement of central venous pressure (CVP) and for the administration of large volumes of fluid for resuscitation, vasopressors, and inotropes.[1] As we know, central venous catheters (CVCs) are designed with three separate non-communicating lumens within a single catheter body: the proximal lumen, the distal lumen, and the medial lumen for separate administration of drugs, CVP monitoring and for fluid and blood administration. The separation of exit ports of the lumens, spaced appropriately based on the catheter’s French size, is crucial for ensuring non-communication between the lumens and preventing the inadvertent mixture of medications.[2] This arrangement reduces the need for multiple venipunctures and allows for the safe administration of medications that may not be suitable for administration through peripheral veins. In this case, we report a rare manufacturing defect in a multi-lumen central venous catheter, where communication between lumens was discovered during a pre-use flush check.

CASE REPORT

In a recent case in our operating room, we discovered during the pre-use flush check that one of the lumens of CVC (7French, triple lumen catheter, 16 cm length, Arrow-Howes, Multi-Lumen Central Venous Catheterisation Set with Blue FlexTip Catheter, Pa, USA) was in communication with another lumen [Figure 1]. This compromised the intended non-communicating design of the catheter.

Figure 1.

Communication between central venous catheter lumens

DISCUSSION

The potential clinical implications of such a manufacturing defect are significant. When administering inotropes or inodilators through different lumens, variations in flow rates could lead to inadvertent underdosing or overdosing of these critical medications.[3] This is especially worrisome when the intention is to deliver separate infusions with precision. Failing to detect such a communication issue during pre-use checks could have severe consequences. In addition to drug admixture, the following problems may occur:

1. Medication Interference: Different medications administered through the communicating lumens could interact chemically or mechanically, reducing the efficacy of treatment, or it could lead to the inadvertent delivery of the bolus of a drug going through one lumen while administering drug bolus from another lumen, which may have catastrophic consequences.

2. Inaccurate CVP Readings: Cross-communication could lead to inaccuracies in CVP monitoring, which is critical for fluid management and hemodynamic assessment.

3. Infection Risk: If one of the lumens is dedicated to a high-risk substance like total parenteral nutrition, unintended contamination or dilution could occur, increasing the risk of infection or other complications.

It is crucial to ensure that every component of the CVC is functioning correctly before use. This includes verifying that physiological saline solution passes through each lumen unobstructed and confirming that the guidewire can be easily inserted into the puncture needle or dilator. Reviewing the instruction manuals of CVCs for any unfamiliar components ahead of time not only prevents delays during the procedure but also helps mitigate the risk of medical accidents that may be caused by improper use.[4] Such manufacturing defects should be brought to the notice of the manufacturer. After a meticulous literature search, we could find only three published case reports related to this sporadic anomaly.[2,3,5]

CONCLUSION

This case highlights the need for careful pre-use testing of all the catheter lumens to verify proper function before medication administration and the importance of vigilance when using multi-lumen CVCs as well as prompts further discussion about quality control measures in catheter design and use. Early detection of such defects can prevent potentially life-threatening complications and improve patient safety.

Conflicts of interest

There are no conflicts of interest.

Funding Statement

Nil.