Medicial neglgence

My mother was operated a procedure named wihpples procedure by Gastro surgeon and after 15 days she discharged from hospital. Sown to doctor in OP after 1 week as health was degrading. (Vomiting and tiredness). He written case was satisfactory. Again after 1 week My mother went unconscious after heavy bleeding from the discharge of wihpples discharge tube. The matter is informed to the hospital and My mother admitted in the hospital on next day. By evening 5PM same was blood discharge was happened and my mother become unconscious and shifted to ICU. The surgical specialist was on leave. After 4 days he came back from leave to on duty. Performed CT scan and asked for Angiogram. In angiogram a blood leak from arterty was detected and asked for stenting by Cardiac doctor. Stend was not available and shifted back to Gastro ICU. A total f 25 nits of bllod was given to my mother that includes plasma. Stend was not available and As per Doctor My mother was suffered a blood loss of 2.5 ltr after 06 days at 0400 Hrs and asked for for an emergency operation. Two days after operation my mother was took her last breath(42 days after operation). 1) Treatment was delayed that is the cause of death 2) Adrenalin injection was given more than 10 ( may 20) during the period. It means it affected the heart. 3) 25 units of blood transfusion was made.which itself will drive a patient having more blood leak from artery(pseudo anuerism). Not treated for pseudo anuerism. 4) A total of 100 injection of octride 500 was given during the period ( one injection cost Rs 500) to prevent gastro for blood leak. That itself is a major mistake. Can it consider as a medical negligence?