An observational study in Postspinal Hypotension, sponsored by Istinye University. Not yet recruiting. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2026-08-14.
Sponsored by Istinye University · Observational
This prospective observational study aims to evaluate the diagnostic performance of the preoperative Diastolic Shock Index in predicting postspinal hypotension and to compare its performance with other shock indices, including the Shock Index, Modified Shock Index, and Age Shock Index. The study will include patients aged 50 years and older undergoing elective unilateral inguinal hernia surgery under spinal anesthesia. Hemodynamic parameters will be recorded before and after spinal anesthesia as part of routine clinical monitoring. The primary outcome is the development of postspinal hypotension. Secondary outcomes include vasopressor requirement, total ephedrine dose, lowest intraoperative mean arterial pressure, and the diagnostic performance of the evaluated shock indices using receiver operating characteristic curve analysis. No additional intervention beyond routine anesthetic and perioperative care will be performed for study purposes.
This prospective observational study will include patients aged 50 years and older undergoing elective unilateral inguinal hernia surgery under spinal anesthesia. The study aims to evaluate the performance of the preoperative Diastolic Shock Index in predicting postspinal hypotension and to compare it with the Shock Index, Modified Shock Index, and Age Shock Index. Baseline systolic, diastolic, and mean arterial pressures and heart rate will be recorded before spinal anesthesia and used to calculate the four shock indices. Hemodynamic parameters will also be recorded at 5, 10, 15, and 20 minutes after spinal anesthesia as part of routine clinical monitoring, without any additional intervention for research purposes.Postspinal hypotension will be defined as a decrease in systolic arterial pressure of at least 25% from baseline and/or a systolic arterial pressure below 90 mmHg. The primary outcome will be postspinal hypotension, while secondary outcomes will include ephedrine requirement, total ephedrine dose, lowest intraoperative mean arterial pressure, and the diagnostic performance of the evaluated indices. Receiver operating characteristic curve analysis will be used to compare the indices and determine the optimal cut-off value for the Diastolic Shock Index, with a minimum of 85 patients planned for inclusion.
885 studies on the registry are indexed under Hypotension; 195 are open to participants now.
This study's planned enrollment of 85 is close to the median of 90 across 265 observational studies indexed under Hypotension.
Browse Hypotension studies →Istinye University is the lead sponsor of 221 studies on the registry; 94 are open to participants now.
Counted across the registry records on this site, refreshed daily.
The study population will consist of patients aged 50 years and older who are scheduled to undergo elective unilateral inguinal hernia surgery under spinal anesthesia at the University of Health Sciences Haseki Training and Research Hospital. Eligible patients with American Society of Anesthesiologists physical status I-III who provide written informed consent will be included. A minimum of 85 patients is planned for enrollment.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
ASA physical status
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients who develop postspinal hypotension, defined as a decrease in systolic arterial pressure of 25% or more from baseline and/or a systolic arterial pressure below 90 mmHg following spinal anesthesia.
Procedure: Spinal Anesthesia
Patients who do not develop postspinal hypotension, defined as the absence of a decrease in systolic arterial pressure of 25% or more from baseline and a systolic arterial pressure remaining at or above 90 mmHg following spinal anesthesia.
Procedure: Spinal Anesthesia
Spinal anesthesia will be administered as part of routine clinical care for elective unilateral inguinal hernia surgery. The study will not modify the anesthetic management or introduce any additional intervention for research purposes. Hemodynamic parameters obtained during routine perioperative monitoring will be recorded to evaluate the development of postspinal hypotension.
Development of Postspinal Hypotension
Occurrence of postspinal hypotension, defined as a decrease in systolic arterial pressure of 25% or more from baseline and/or a systolic arterial pressure below 90 mmHg following spinal anesthesia.
Time frame: Within the first 20 minutes after spinal anesthesia
No study locations are listed for this record.
Plan to share: No — There is no plan to make individual participant data available to other researchers.
Start is estimated for Aug 2026; primary completion for Feb 2027, 6 months later.
Of 146 non-industry observational studies under Hypotension, half reached primary completion within 12 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 25. This study's planned 6 months is below that.
Counting every sponsor, half of 151 studies reached it within 11 months; a quarter within 5 and three quarters within 24.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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