UNIVERSITY OF MinnesotaMEDICAL SCHOOLDEPARTMENT OF SURGERY * MINNEAPOLIS, MINNESOTA 55455January 21, 1966Dr. Karel Absolon2714 West 10thAmarillo, TexasDear Karel:I certainly was happy to hear from you the other day, andam happy that things are going along very well.Listed below are the addresses and pertinent information thatyou asked for.Magovern Valves are made by Surgitool, Inc., 529 GreenhurstDrive, Pittsburgh, Pennsylvania, 12516. Their telephone number is412-343-2654.Star-Edwards Valves are made by the Edwards Laboratories,624 Dyer Avenue, Santa Ana, California, 92705. Their telephonenumber is 714-546-0511. They also make the sizers and holders whichwe used here. The holders, of course, are modified. Phelan Manu-facturing Co. makes one holder which will adapt to the Edwards Holderbut this would not be entirely satisfactory for the technique that wehave been using.The arterial cannulas are Mayo femoral cannulas with lip,at$23.50 each and are made by the Mark Co., 31 West Street, Randolph,Massachusetts, Attention: Mr. E.J. Finneran. The sizes that areavailable are 2.4, 3.0. 3.2, 3.4, 3.8, 4.4, 4.9, 5.4, 5.9, and 6.4mm. in diameter.I hope that this information is helpful to you. If there is any-thing else that Ican do, please let me know. Be sure to give my regardsto Mary and the children.Most sincerely yours,Robert D. Sellers, M.D.Assistant Professor of SurgeryRDS:ab