Provides a point of attachment between the needle and the intravenous medication.
What is bevel?
The angular part of the needle.
What is Angiocath?
A two or three piece system consisting of a needle and an outer catheter/sheath. The needle initially is used to puncture the vein, gaining vein access. After the needle has been inserted into the vein, the needle is withdrawn, leaving only the catheter or sheath in the vein for injection. Although there is a lower incidence of infiltration than with a butterfly, angiocaths are more likely to cause phlebitis.
What is Butterfly?
Winged-tip needle used for short term infusion usually easier to insert
What is Gauge?
The diameter size of the needle the higher the number the smaller the diameter.
What is Lumen?
The size of the opening
What is superselective Catherization?
The catherization of a smaller vessel other than one arising off of the aorta.
EX. Gastric, Splenic, Hepatic, Gastroduodenal, etc.
What is Selective Catherterization?
The catheterization of a vessel which branches off a major artery
Ex: Catherterization of a vessel arising of the aorta Celiac, SMA, IMA, Left Carotid, Iliac etc.
What is flush?
The term given to a large amount of CM ijected into a medium/large size vessel that is evenly ditributed
What is coefficeint of friction?
The ease with which a catheter moves in a vessel, the ease with which a guidewire moves within a catheter, and the resistance either of these creates.
What is catheter torque?
The ability of a catheter to respond to twisting and turning after it has been introduced into a structure.
What is catheter memory?
The ability of a catheter to retain it's shape at the distal end after it has been introduced into a sturcture.
What is a manifold system?
A series of multiple stopcocks provides
1. A port for continous pressure monitoring
2. A port for fluid flushing
3. A port for CM
4. A connection point to the catheter and a control syringe.
What is an ad?apter
Used to connect syringes and catheters
What is a stopcock?
Directional fluid flow device. One way often called a flow switch
What is a vascular introducer sheath?
Used when multiple catheter exchanges are anticipated or when bleeding occurs.
What are vascular dilators?
Thick walled plastic tubing with a tapered tip make vessel larger without an damaged usually 5 to 6 inches in length
What are types of needles
-Angiocath:2 parts primarily used for venipuncture, various sizes
-Seldinger: 2 parts used for aterial and venous puncture 16,18, & 20 gage
-Potts:Cournand 3 parts used for arterial and venous puncture, 18 g most common
-Amplatz:3 parts fitted radiopaque teflon outher sheath 16,18, and 20 gage
-Chiba: Long & thin 22&23 g used in percutaneous biopsy or aspiration procedures
What are types of guidewires?
All vascular catheters should be flushed with heparinized saline
Multi side hole catheters should be flushed 3x more often
What do you have to consider when selecting a catheter?
Low Coefficeient of friction (slides easily)
What are the basic shapes of a catheter?
What are the characteristics of Teflon?
-Stiff has good memory( ability to retain shape after inserted w/ guidewire)
-Not easily reashaped
-Lowest coefficient of friction
-Best suitied for use as introducer sheaths and Dialtors
-Higher material strenght Higher potential to kink
What are characteristics of Nylon or Dacron?
Has good torque control disadvantage its resistance to reshaping with steam?
What are characteristics of Polyurethane?
It can be constructed of stainless steel braided body with soft braided tip. Highest coefficient of friction( does not slide very easily in vessel) High tissure compatibility low thrombgenicity. Blood clots don't form easily.
What are the ypes of material used to make Catheters?