Hey,
The best institute isSAI PARAMEDICAL INSTITUTEbased in Delhi. In Delhi many School, Colleges and Hospital offers Lab Technician Courses.MAX INSTITUTE OF MEDICAL EXCELLENCE, Dr.Lal Pathlab, Institute of Public Health & Hygienethese are some Institute and hospital where you can do the course.You may also do aCertificateorDiploma programin the field of Medical Lab Tecnology.
Hope it helps!

BSC in operation theatre technology is 3year graduate degree program 

Too institute are :-

1) maharishi markandeshwar University Ambala

2)Sgt universty Gurgaon

3)nims school ,Jaipur

4) universiUnof technology ,Jaipur

5)symbiosis institute of health science ,pune