use of entropy(a device to give numerical value to processed EEG data)to monitor sedation in spinal anesthesia( technique used for surgeries of lower abdomen and lower limbs)

use of spectral entropy to monitor sedation in patients undergoing surgery under subarachnoid block/ combined spinal epidural anesthesia

Status

Active, not recruiting

Phases

Phase 4

Study type

Interventional

Source

CTRI

Registry ID

CTRI/2013/05/003697

Enrollment

Registered

2013-05-29

Start date

Unknown

Completion date

Unknown

Last updated

2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: null- surgery

Interventions

Intervention1: fentanyl in subarachnoid block: two groups : one with single dose of 25 microgram fentanyl and 2ml 0f 0.5%(10 milligram) bupivacaine in subarachnoid block and other group with single do

Eligibility

Inclusion criteria

Inclusion criteria: patients aged 18-70 years of ASA Status 1-2 undergoing surgery under subarachnoid block/ combined spinal epidural anesthesia lasting 30 minutes to 2 hours

Exclusion criteria

Exclusion criteria: 1. Patient refusal 2. age > 70years or 3. known allergy to given drugs 4. any contraindication to subarachnoid block 5. patients inability to maintain stillness during the procedure 6. raised intracranial pressure 7. intrinsic or idiopathic coagulopathy 8. skin or soft tissue infection at the proposed site of block 9. severe hypovolemia 10. obesity(BMI >35) 11. Neurological or psychiatric disease on concurrent medication

Design outcomes

Primary

Measure	Time frame
decrease in entropy values after subarachnoid block per seTimepoint: seen at 5, 10, 15 , 20 minutes after the subarachnoid block	—

Secondary

Measure	Time frame
difference in propofol requirement between the two groupsTimepoint: every 5 min after the starting of propofol sedation i.e 20 minutes after the SAB	—

Countries

India

Contacts

Public ContactDr V Darlong

all india institute of medical sciences

darlongv@yahoo.com9868397809

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Apr 4, 2026