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Spinal AnaesthesiaNCT06988982

Lipid Emulsion for Reversal of Spinal Anesthesia in Ambulatory Surgery

A study testing Intravenous Lipid Emulsion 20% in people with Spinal Anaesthesia and Spinal Anesthesia Evaluation, run by Zagazig University at 1 site in Egypt.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Ambulatory surgery places high demands on anesthetic technique. rapid onset and offset of anesthesia, rapid recovery of protective reflexes, mobility and micturition, are required. Since the inception of ambulatory surgery, the favored anesthetic technique has been general anesthesia with short-acting drugs. Read more about this study

Who is it for?
Ages 21 to 70 years
What is being tested?
Intravenous Lipid Emulsion 20%
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
70 participants
Where
1 siteEgypt
Study dates
1 Jun 2025to 28 Feb 2026
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 21 to 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patient acceptance.
  • Cooperative patient
  • Age 21-70 years old.
  • BMI ≤ 35 kg/m2
  • ASA I - II.
  • Elective ambulatory surgery under spinal anesthesia (general surgery, urology, gynecology, orthopedic surgery).

Who cannot join

  • History of allergy to the LA agents used in this study,
  • Skin lesion at needle insertion site,
  • Those with bleeding disorders, sepsis, liver disease and psychiatric disorders
  • History of cognitive dysfunction or mental illness

Trial locations and contacts

1 site in 1 country.

Egypt1 site
  • Zagazig University Hospitals

    Zagazig, Al Sharqia, 44519

Other trials in Egypt

About this study

Official title: Lipid Emulsion for Reversal of Spinal Anesthesia in Ambulatory Surgery: A Randomized Controlled Trial

Ambulatory surgery places high demands on anesthetic technique. rapid onset and offset of anesthesia, rapid recovery of protective reflexes, mobility and micturition, are required. Since the inception of ambulatory surgery, the favored anesthetic technique has been general anesthesia with short-acting drugs. Concerns about the time to perform spinal anesthesia and the risks of prolonged motor block and urinary retention have limited its use.

Alpha-blockers, lavage fluids for epidural space, insulin, and intravenous lipid emulsions, are still being discussed to shorten and reverse adverse effect of different LAs used for spinal anaesthesia, hence we will evaluate the effectiveness of intravenous lipid emulsion for reversing the neural blockade of spinal anaesthesia in patients undergoing ambulatory surgery.

Read the detailed description

An increasing number of ambulatory surgical patients is challenging the currently used anaesthesia methods, reliable surgical anaesthesia should be quick, with rapid recovery and minimal side effects. Spinal anaesthesia (SA) is an easy and reliable technique that has grown in popularity for inpatient surgery, but its use in ambulatory surgery has been limited due to several factors including the prolonged neurological block with long-acting local anaesthetics (LA), delayed ambulation, risk of urinary retention and pain after block regression therefore delaying patient discharge. On the other hand, general anaesthesia with short-acting drugs grants rapid recovery enabling the early discharge. While recovery after spinal anaesthesia has been recently improved by lowering the dose of the commonly used long-acting local anaesthetics such as bupivacaine, discharge times are still prolonged compared to general anaesthesia.

Intravenous lipid emulsions (ILEs) were originally developed as a part of parenteral nutrition for critically ill patients, dating back to the 1960s. Over the last ten years, there has been rising interest in ILEs in clinical toxicology beyond its established role in the treatment of acute intoxication with local anaesthetics (LAST). The use of ILEs for the treatment of lipophilic drug toxicity is increasing nowadays with several studies reported alleviation of intractable cardiovascular collapse induced by toxic doses of these non-local anaesthetic drugs including calcium channel blockers (verapamil), tricyclic antidepressants (amitriptyline) and beta-blockers. In addition, Complications following intrathecal administration of bupivacaine have been reported to be successfully managed with intravenous administration of lipid emulsion.

While the precise mechanism by which ILEs exerts its effect remains unknown, the leading theory is that the ILEs intravascular action entails creating a concentration gradient which favours LA redistribution to the extracellular space. Lipid vesicles then encapsulate LA creating lipid sinks and the formation of this "trap" removes the toxins from the various tissues and organs, reducing their bioavailability and the sequestration mechanism where LA is rapidly redistributed by "lipid shuttles" to sites of metabolism (liver), storage (adipose tissue) or elimination (kidney). Alternative theories include reduced binding of local anaesthetics to sodium transport channels, direct promotion of sodium channel function recovery, and replenishing ATP stores from increased uptake of fatty acids by mitochondria.

Considering the few published reports supporting the effectiveness of ILEs in reversing the primary nervous system effects of regional anaesthesia such as total or high spinal anaesthesia, prolonged neural blockade, and reverse phrenic nerve palsy secondary to a brachial plexus block with the well-known favourable safety profile of ILEs. We hypothesized that ILEs could be an attractive effective option to reverse the sensory and motor actions of intrathecal bupivacaine thus accelerating the neurological recovery after spinal anaesthesia which could avert the delayed hospital discharge and facilitate the use of SA for ambulatory surgeries.

Being tested
Intravenous Lipid Emulsion 20%, Control (placebo) group
Keywords
lipid emulsion, spinal anesthesia, ambulatory surgery

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Intravenous Lipid Emulsion 20%Drug

    patients will receive 1.5 ml/kg bolus of intravenous lipid emulsion 20 % followed by 0.25 ml/kg/hr infusion over 30 minutes at the end of surgery

  • Control (placebo) groupDrug

    patients will receive equal volume of normal saline at the end of surgery

Study groups in NCT06988982
Study groupRoleWhat they receive
Group ILE (Intravenous lipid emulsion group)Experimentalpatients will receive 1.5 ml/kg bolus of intravenous lipid emulsion 20 % followed by 0.25 ml/kg/hour infusion over 30 minutes at the end of surgery
Receives: Drug: Intravenous Lipid Emulsion 20%
Group C (control group)Placebo comparatorpatients will received equal volume of normal saline at the end of surgery
Receives: Drug: Control (placebo) group

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Time for complete sensory and motor regression (min)

    Time for complete sensory regression (min) (primary outcome) to be calculated from the time of ILEs administration (T0) until full sensation at S1 dermatomal level achieved Time for complete motor regression (min) (primary outcome) to be calculated from time of ILEs administration (T0) until Bromage score will be zero.

    Measured: 6 hours after surgery

Secondary outcomes (11)
  1. Time for two segment sensory regression (min)

    the time for regression by two dermatomes compared with the dermatomal level assessed at finishing ILEs infusion (T0)

    Measured: 6 hours after surgery

  2. Time to walk (min) without or with minimal assistance

    the time from the ILE administration time (T0) till the patients first stand and walk.

    Measured: 6 hours after surgery

  3. Time to Void (min)

    the time from the ILE administration time (T0) till the patients first urinate.

    Measured: 6 hours after surgery

  4. Time to be home-ready (min)

    the time from the ILE administration time (T0) till the patients are ready for home discharge as defined by the modified post anaesthesia discharge scoring system.

    Measured: 6 hours after surgery

  5. Time to actual hospital discharge (min)

    the period from the end of the surgery till the patients actually leaves the hospital.

    Measured: 24 hours after surgery

  6. Heart rate (HR), and arterial blood pressure (MAP)

    Heart rate (HR), and arterial blood pressure (MAP), will be recorded immediately before and after the ILEs administration, at PACU admission and then every 15 min till the PACU discharge.

    Measured: 6 hours after surgery

  7. Numerical rating scale (NRS)

    Numerical rating scale (NRS) will be postoperatively assessed and recorded at PACU admission, PACU discharge to phase II recovery, in phase II recovery room, before actual hospital discharge and at 24 h.

    Measured: 24 hours after surgery

  8. Time to first rescue analgesia (min)

    the time between ILE administration (T0) to the time patients make their first request for pain relief and NRS ≥ 3.

    Measured: 24 hours after surgery

  9. Total dose of rescue analgesia (diclofenac sodium)

    Total dose of rescue analgesia (diclofenac sodium), that will be consumed in the first 24 hours postoperatively.

    Measured: 24 hours after surgery

  10. Postoperative Complications.

    Postoperative complications will be evaluated including nausea and vomiting, the use of antiemetics, inability to void within 4h after surgery, post-dural puncture headache, transient neurological symptoms (TNS) and lipid emulsions related adverse effects such as hypotension, bradycardia, fever, dyspnea, allergic reaction, increased risk of infection, and fat overload syndrome.

    The day after surgery and for one week, all patients will be contacted by telephone and asked about pain and analgesic use, low back pain, headache and transient neurological symptoms. One and two weeks after surgery, patients will be evaluated by the surgical team and the existence of any complications will be recorded.

    Measured: 2 weeks after surgery

  11. Patient satisfaction

    Patient satisfaction using a 3-point Likert scale (3=satisfied, 2= neutral, 1=dissatisfied).

    Measured: 2 weeks after surgery

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 May 2025
  2. Study start1 Jun 2025
  3. Primary completion28 Feb 2026
  4. Study completion28 Feb 2026

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Other
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
70 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06988982
Sponsor's protocol ID
1270/13-5-2025
Status last verified
May 2025
First submitted
17 May 2025
Last updated
7 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: all collected IPD

Publications

  • Palumbo P, Tellan G, Perotti B, Pacile MA, Vietri F, Illuminati G. Modified PADSS (Post Anaesthetic Discharge Scoring System) for monitoring outpatients discharge. Ann Ital Chir. 2013 Nov-Dec;84(6):661-5.

    PubMed 23165318
  • Bromage PR. A comparison of the hydrochloride and carbon dioxide salts of lidocaine and prilocaine in epidural analgesia. Acta Anaesthesiol Scand Suppl. 1965;16:55-69. doi: 10.1111/j.1399-6576.1965.tb00523.x. No abstract available.

    PubMed 5322004
  • Downie WW, Leatham PA, Rhind VM, Wright V, Branco JA, Anderson JA. Studies with pain rating scales. Ann Rheum Dis. 1978 Aug;37(4):378-81. doi: 10.1136/ard.37.4.378.

    PubMed 686873
  • 14. Kumar KS, Talawar P, Gupta B, et al. OP020 Efficacy of 20% intravenous lipid emulsion as a reversal agent of spinal anaesthesia: a double blinded randomized controlled trial. Regional Anesthesia & Pain Medicine 2023;48:A12.

  • Tampakis K, Vogiatzakis N, Kontogiannis C, Spartalis M, Ntalianis A, Spartalis E, Siafaka I, Iacovidou N, Chalkias A, Xanthos T. Intravenous lipid emulsion as an antidote in clinical toxicology: a systematic review. Eur Rev Med Pharmacol Sci. 2020 Jun;24(12):7138-7148. doi: 10.26355/eurrev_202006_21708.

    PubMed 32633409
  • Cave G, Harvey M, Graudins A. Intravenous lipid emulsion as antidote: a summary of published human experience. Emerg Med Australas. 2011 Apr;23(2):123-41. doi: 10.1111/j.1742-6723.2011.01398.x. Epub 2011 Apr 7.

    PubMed 21489160
  • 11. Hadbi M, Benalakma D, Berbiche R, et al. Effect of lipid infusion on the reversal of atypically prolonged duration and high spinal anesthesia. About two cases. J Clin Res Anesthesiol. 2021; 4: 1-4.

  • 10. Hadbi M, Benalakma D, Berbiche R, et al. Abnormal Prolonged Duration of Spinal Anesthesia in Patient with Multiple Sclerosis. J Anesth Clin Res. 2021; 12: 984.

  • 9. Joseph Eldor, Pham V, Tran TP, et al. Local Anesthesia Reversal LAR of Total Spinal Anesthesia TSA by Lipofundin Lipid Emulsion. Jor Health Sci Development. 2018; 1: 67-72.

  • 8. Seglenieks R, Chowdhury A. Use of Lipid Emulsion to Reverse the Effects of Regional Anesthesia: A Novel Indication. Translational Perioperative and Pain Medicine. 2023; 10 (1):512-514. DOI 10.31480/2330-4871/171.

  • Hoshino R, Kamiya Y, Fujii Y, Tsubokawa T. Lipid emulsion injection-induced reversal of cardiac toxicity and acceleration of emergence from general anesthesia after scalp infiltration of a local anesthetic: a case report. JA Clin Rep. 2017;3(1):9. doi: 10.1186/s40981-017-0077-6. Epub 2017 Feb 10.

    PubMed 29492448
  • Muller SH, Diaz JH, Kaye AD. Clinical applications of intravenous lipid emulsion therapy. J Anesth. 2015 Dec;29(6):920-6. doi: 10.1007/s00540-015-2036-6. Epub 2015 Jun 7.

    PubMed 26049929
  • Picard J, Meek T. Lipid emulsion for intoxication by local anaesthetic: sunken sink? Anaesthesia. 2016 Aug;71(8):879-82. doi: 10.1111/anae.13395. Epub 2016 Feb 8. No abstract available.

    PubMed 26854285
  • Afolayan JM, Olajumoke TO, Olaogun J, Kadiri I. Reversal of spinal anaesthesia and prevention of post operative complications using intralipid emulsion. J Clin Images Med Case Rep. 2024; 5(2): 2880.

  • Waring WS. Intravenous lipid administration for drug-induced toxicity: a critical review of the existing data. Expert Rev Clin Pharmacol. 2012 Jul;5(4):437-44. doi: 10.1586/ecp.12.27.

    PubMed 22943123

Questions about this trial

What is this clinical trial studying?

A study testing Intravenous Lipid Emulsion 20% in people with Spinal Anaesthesia and Spinal Anesthesia Evaluation, run by Zagazig University at 1 site in Egypt.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 7 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Time for complete sensory and motor regression (min) (time frame: 6 hours after surgery). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06988982, which also lists 17 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Jul 2026.

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