Diagnostic in hospital service involves conducting various tests and procedures to diagnose and treat various medical conditions and illnesses. The main duties to be done to a patient include:

1. History taking: The healthcare provider will take a thorough medical history of the patient to understand their symptoms, health conditions, and any previous treatments.

2. Physical examination: A physical examination will be conducted to check the patient's vital signs, look for signs of disease, and assess the overall health of the patient.

3. Laboratory tests: Blood and urine tests may be conducted to check for any underlying health conditions and to monitor the patient's progress.

4. Imaging tests: The healthcare provider may conduct various imaging tests such as X-rays, CT scans, MRI scans, or ultrasound to diagnose medical conditions.

5. Biopsy: If necessary, the healthcare provider may perform a biopsy to remove a small tissue sample for further testing and diagnosis.

6. Consultation with specialists: The healthcare provider may refer the patient to a specialist if necessary to diagnose a specific medical condition or to determine the best course of treatment.

7. Medication administration: The healthcare provider will prescribe and administer medications as part of the patient's treatment plan.

8. Monitoring and follow-up: The healthcare provider will closely monitor the patient's progress, review test results, and conduct follow-up appointments as needed.

Overall, the main aim of the diagnostic in hospital service is to provide quality care to patients and to diagnose and treat various medical conditions to improve their overall health and well-being.