Search results
Results from the WOW.Com Content Network
Tunneled catheters have multiple channels called lumens which lay exposed on the surface of the skin. These lumens are the access points when the catheter is used. Tunneled catheters can be single, double, or triple lumened. Removal of a tunneled catheter is a simple procedure requiring only local anesthetic. A bandage is applied to the site to ...
Catheter access, sometimes called a CVC (central venous catheter), consists of a plastic catheter with two lumens (or occasionally two separate catheters) which is inserted into a large vein (usually the vena cava, via the internal jugular vein or the femoral vein) to allow large flows of blood to be withdrawn from one lumen, to enter the dialysis circuit, and to be returned via the other lumen.
A valvulotome is a catheter-based controllable surgical instrument used for cutting or disabling the venous valves. [1] This is needed to enable an in situ bypass in patients with an occluded artery (especially femoral artery), where the saphenous vein is disconnected from the venous system and connected to arteries above and below the occluded segment to allow blood to flow to the lower leg.
The most commonly used catheter for central venous access is the triple lumen catheter. [3] They are preferred (particularly in the ICU) for their three infusion channels that allow for multiple therapies to be administered simultaneously. They are sized using the French scale, with the 7 French size commonly used in adults.
In some situations, venous access is obtained by inserting catheters into the large central veins of the trunk of the body such as the internal jugular, subclavian, or femoral veins. This type of venous access is performed with central venous catheters (CVCs) , and is required in certain situations where peripheral access is inadequate.
Chronic venous insufficiency is the abnormal pooling of blood in the lower extremity venous system which can lead to reticular veins, varicose veins, chronic edema and inflammation among other things. Population data suggests that chronic venous insufficiency affects up to 40% of females and 17% of males. [21]
Both patients and hospital staff typically strongly prefer the transradial approach as opposed to femoral access. [13] [14] In era of cost control, the savings in closure devices (which are used to allow earlier ambulation after transfemoral catheterization), and early discharge had made this a cost-saving approach. [13]
The femoral vein is often used to place a central venous catheter, or line for venous access. Ultrasound imaging for locating the vein and catheter placement is advocated over the use of anatomical landmarks due to the possible presence of anatomical variants. [23] [24] [25] This is associated with a significant risk of infection. [25] [26]