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Catheter exteriorization options

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Envigo’s standard catheter exteriorization is fixed, not allowing for access of the coiled subcutaneous catheter tubing.

A small midline skin incision is made dorsally, between the scapulae of the animal, and a subcutaneous pouch is created near the incision, to house the excess catheter tubing.

The catheter is tunneled subcutaneously from vessel insertion point and exteriorized out through the dorsal skin incision. Of the two (2) dumb-bell suture points on the exteriorized end of the catheter, the first is placed under the skin and secured with non-absorbable suture, anchoring the catheter in place.

A sterile wound clip is placed over the skin incision and catheter, effectively and simultaneously closing the incision and anchoring the catheter in place. The second colored dumb-bell suture point on the exteriorized end of the catheter is placed extraneously and secured to the skin with non-absorbable suture, again anchoring the catheter in place.

Approximately 25 mm of catheter is exteriorized and the catheter end is sealed with a sterile stainless steel plug. Animals must be singly housed.

Envigo is able to provide a second subcutaneous pouch closure method, where the coiled portion of the subcutaneous catheter tubing (an approximate eight cm length) is able to be withdrawn from the pouch. At the exteriorization site, two (2) sterile wound clips are used to close the skin incision and anchor the catheter to the skin. In this modifi cation, only the colored extraneous dumb-bell suture point is utilized. Approximately ten mm of catheter tubing is left exteriorized and sealed with a sterile stainless steel plug. After the client cuts the suture surrounding the colored extraneous dumb-bell suture point, the subcutaneous catheter tubing can be pulled from the subcutaneous pouch. Animals must be singly housed.

  • Harness exteriorization — Envigo can provide harnessed, catheterized rodents. Harness options include infusion, single port, double port, bile sampling, and quick connect. Animals must be singly housed
  • PinPort™ — Envigo is able to provide catheterized animals with a PinPort™ replacing the sterile stainless steel plug at the exteriorized end of the catheter. Approximately three mm of catheter tubing is exteriorized. Animals must be singly housed
  • Dacron mesh button — Envigo can implant a dacron mesh button between the scapulae of the animal. The sealed catheter exteriorized end will exit up and out through the button’s plastic stalk. This model allows for an effective method by which to attach the catheter to a spring tether. Animals must be singly housed
  • Vascular access port — Envigo can provide a catheterized animal with a dorsally located subcutaneous vascular access port (VAP). This surgical model does not have the catheter, nor the port, on the outside of the animal. That is, the catheter and the port are completely subcutaneous. Access to the port is through penetration of the animal’s skin using a non-coring needle. Dermal application of antibacterial moisturizing cream to the VAP access site is recommended after each access event. This model supports group-housing of animals
  • Vascular access button — Envigo can provide catheterized animals with the catheter attached to a vascular access button. The button’s base is implanted under the skin between the animal’s scapulae, with the catheter attached to the button at the base. An extraneous port allows for vascular access with a non-coring needle or mating tether. Optional materials allow for these animals to be group-housed..

 

Request our overview of catheterization services, “Vascular catheterization rodent surgical models — what, why, and how to flush” using the form below:

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