Pupils Switch Frogs' Hearts

A Slauson Junior High School organ transplant team yesterday completed its second heart switch in a six-hour operation at the school. Headed by embryonic surgeons Matee Rizki and Robert Davis, both 15, the team of studente from Mrs. Irene E. Brock' s ninth grade biology class transplanted Catherine's heart into Heathcliff in an operation which began at 10:15 a.m. and ended at 4:15 p.m. Both the donor and recipiënt, large grass frogs, were former residents of North Carolina. Their ages and original pond or river of residence are unknown. Heathcliff died 31 minutes after the operation from coronary thrombosis as a result of solutions used in the surgery getting into the blood stream, according to the students. Matee, a son of Mr. and Mrs. Tahir Rizki of 1230 Ardmoor, and Robert, a son of Mr. and Mrs. Roy Davis of 223 Crest, were more successful yesterday however, than in the first such operation at the school on May 7 in which an unnamed frog recipiënt lived 20 minutes after completion of surgery. Mrs. Broek called tiie two heart transplant operations "a peak learning experience in which the students enthusiastically lost themselves and forgot about everything else. "It was their own idea. I didn't do any of the work for them. They bought their own equipment with their own money and made their own materials," she said. "All I did was supervise to see that all went well. They worked at it during their lunch, periods and after school and spent many hours in the library reading up on it," she added. Mrs. Broek said "the dents used extreme care to make sure the frogs didn't suffer at anytime" and Finguel MS-22 anesthetic obtained from the U-M zoology department was employed during the operation. "We w e r e dissecting frogs and Matee and Robert came up with the idea of performing a heart transplant," she said. During the May 7 transplant operation which lasted from 10:15 a.m. to 2:45 p.m., students from throughoutthe school continually crowded into the room to watch. "This time we used a pass system to reduce the number of onlookI ers," the biology teacher said. She said yesterday's operaItion took loneer than the previous one "because the students ran out of surgical thread in the middle of it." John Marr, 15, a son of Mr. and Mrs. Louis Marr of 209 Virginia, phoned nis mother and they sperit more than an hour driving around Ann Arbor looking for sutures' .before they found some, the teacher saiü. Mark Willis, 14, a son of Mr and Mrs. David Willis of 1227 . Lutz, built the h e a r t - 1 u n g machine for the operations, usin-g parts from an old bicyde pump and other odds and ends. The students who performed the surgery were assistedbyj Jan Hartwell, 15, daughter of Mr. and Mrs. Robert L. Hartwell of 426 Eberwhite, and Allen Borchers, 14, son oí Mr. and Mrs. Cari F. Borchers of 608 N. Maple. Barbara Fuester, 14, aaugnter of Mr. and Mrs. Robert Fuester of 1927 Dexter, and Corinne Hewett, 15, daughter of Mr. and Mrs. Arman Hewett of 1103 W. Madison, tape recorded the entire procedure. Cathy Powers, 14, daughter of Mr. and Mrs. Neal Powers of 1245 S. Maple, wrote up the surgical record. The students borrowed a kymotograph, or heart monitor, from Hurón High School, used the school autoclave to sterilize surgical instruments and built a