Semester 2- Week 9 Kierstin

 

This is our current valve under the microscope in the eye lab. We looked at the Ahmed plates under it, and we may use it to get pictures of our final product.

Worked on Solidworks body shape to replicate the baerveldt. Then I had to extrude the tubes. There is only one tube inserted, and the two angled “tubes” are just extruded cuts. The dimensions are comparable to the baerveldt. 

Had to extrude where the plates will be inserted. 

This is what the final valve would look like with the ahmed resistors in. One adjustment we could make is to have the valves more on the sides, but this valve represents the concept well, and the size and shape.

Eye surgery prep: 

Cut and clear a pocket for the valve. 

When inserting it needs to be 8 mm behind the limbus (or the coloring part of the eye) 

The baerveldt valve goes under the eye muscles, its about 10 mm behind the limbus, much farther back. 

Things needed for simulation: 

Get a water bottle to continuously clear the eyes of blood

Tray for surgery 

Paper towels, and PPE 

Surgival tools 

Step 1: Secure the eye so it does not move, and clamp the eye open with the eyelids out of the way 

Step 2: Make the first incision

Step 3: Make a pocket between the superior and lateral rectus muscles using scissors by blunt dissection 

Step 4: Insert the valve into the pocket 8mm back and suture it to the sclera 

Step 5: Cut the tube bevel up so its 2-3 mm of insertion into the anterior chamber between the iris and the cornea

Step 6: Use a 23 guage needle to create a track 

Step 7: insert the tube 

Step 8: Cover the tube with patch graft 

Step 9: Recover the site with the conjunctiva and suture it shut 

Roles of people in surgery: