Cerebral angiography procedure
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Cerebral angiography uses the Seldinger technique to insert a catheter into the femoral artery for contrast injection and imaging of brain vessels. The procedure involves puncturing the femoral artery with a needle, inserting a guide wire, threading a dilator and catheter over the wire, and advancing them into the artery. Various catheters and guidewires are used depending on the vessel size and anatomy. Risks include bleeding, clot formation, vessel damage, and contrast reaction. Proper technique and sterile precautions are important to minimize risks.
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Intravenous catheterisation powerpoint presentation
Peripheral intravenous catheters are used to provide venous access for blood sampling, fluid administration, medications, and other purposes. They involve inserting a small gauge cannula into a superficial vein in the arm or hand. Central venous catheters are longer catheters placed into larger central veins to administer irritating or large volume substances. Proper techniques like using ultrasound guidance and the Seldinger technique aim to safely place the catheter and minimize complications like infection, bleeding, or injury to surrounding structures. Ongoing care of the insertion site and catheter is also important.
Iv cannulation Intravenous Cannulation
Intravenous
Cannulation
A intravenous cannula is a flexible tube which when inserted
into the body is used either to withdraw fluid or insert
medication.
• IV Cannula normally comes with a trocar ( a sharp pointed
needle ) attached which allows puncture of the body to get
into the intended space.
Arthroscopy wmt
An arthroscope is an optical instrument used to examine the interior of a joint cavity. There are three main types of optical systems used in arthroscopes: classic thin lens, rod-lens, and graded index lens systems. Key characteristics of arthroscopes include diameter, angle of inclination, and field of view. Arthroscopy procedures involve using specialized instrumentation, establishing portals for tool insertion, fluid management, and knot tying techniques. Powered instruments like shavers are used to remove loose tissue. Proper patient positioning, anesthesia, and landmark identification are important for portal placement safety and visualization.
Similar to Cerebral angiography procedure (20)
Seminar on basic principles of endovascular surgery
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Cerebral angiography procedure
- 2. SELDINGER TECHNIQUE ●Seldinger needle, guide wire, dilator, sheath / catheter ●18gauge single use,sterile needle. ●2 parts-- a solid inner needle(stylet) & an outer thin wall needle for smooth passage. ●The radiologic examination of vessels after the introduction of a contrast medium.
- 4. Femoral ● Puncturing femoral artery is most common catheterization approach ● It is easily accesible and large ● The best entry level is at the apex of the femoral arch
- 8. ● Site cleaned, area draped, local anesthetic given. ● The seldinger needle is introduced into the artery. ● When pulsating blood returns, the stylet is removed.
- 9. ● A guide wire is inserted through the needle. ● With guide wire in vessel, needle is removed. ● Catheter is threaded onto the guide wire. ● Stabilize needle with the other hand to prevent from dislodging ● Under fluoro, the catheter is then advanced and the guide wire is removed.
- 11. ● Advanced dilator over the wire 1 to 1 half inches into the insertion point and rotate. Remove dilator ● Advanced sheath/ catheter over the guidewire into the vessel. Remove guide wire ● Flush and secure cathether to skin with suture ● Wrap to provide additional stabilization
- 12. GUIDEWIRES ●Guide the catheter. ●Allow safe introduction of catheter into the vessel. ●Made of stainless steel. ●Usually about 145cm long
- 14. CATHETERS •Many shapes and sizes. •diameter is given in French(Fr)—3Fr=1mm. •Straight- end hole only—smaller vessels/minimal contrast. •Pigtail- circular tip with multiple side holes — larger vessels/ more contrast. •Simmons catheter is highly curved --- for sharply angled vessels--cerebral and visceral angiography.
- 16. Contraindication and risk Contra-indications ●Contrast allergy ●Impaired renal function ●Blood- clotting disorders ●Anti coagulant medication ●Unstable cardio pulmonary/ neurological status Risks ●Bleeding at puncture site ●Thrombus formation ●Embolus formation – plaque dislodged from vessel wall by catheter ●Dissection of vessel ●Puncture site infection ( contaminated sterile field) ●Contrast reaction
- 22. THANKS