Surgery Clinical Trial
Official title:
Exploring New Grounds in Physiology of the Elderly- Oxygen Extraction and Delivery During Anaesthesia and Major Surgery
Verified date | June 2022 |
Source | Karolinska Institutet |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
This clinical observational study investigates perioperative oxygen consumption and delivery in elderly patients undergoing major surgery. The primary objectives are to characterise the perioperative oxygen delivery, consumption and potential markers of oxygen debt. Secondary objective is to estimate the correlation between oxygen delivery/consumption and postoperative outcomes to guide the design of a future trial.
Status | Completed |
Enrollment | 20 |
Est. completion date | April 4, 2018 |
Est. primary completion date | March 23, 2018 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 65 Years and older |
Eligibility | Inclusion Criteria: 1. Men and women aged =65 years 2. Major/complex surgery (BUPA AXA classification of surgical severity) 3. Central and arterial venous catheterization for hemodynamic monitoring. 4. Written informed consent 5. Available research team for the measurements If two subjects are eligible the elder one will be chosen. If there are two subjects eligible of different gender and almost the same age, the subject with a gender that is underrepresented by two or more will be chosen. This is consistent with the purpose of including subjects with as high age as possible without interfering with recruitment. Exclusion Criteria 1. Concomitant medication with Lithium (interferes with calibration of the LiDCO monitor) 2. Weight= 40 kg. 3. Not possible to establish arterial or central venous line. 4. Planned postoperative care at high-dependency unit (POP/IMA) <12hrs. |
Country | Name | City | State |
---|---|---|---|
Sweden | Karolinska University hospital Huddinge | Stockholm |
Lead Sponsor | Collaborator |
---|---|
Karolinska Institutet |
Sweden,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | oxygen consumption | change of oxygen consumption after anaesthesia induction | prior to and 15 minutes after anaesthesia induction | |
Secondary | oxygen consumption | changes of oxygen consumption during surgery and postoperative recovery | perioperatively 0-36hrs | |
Secondary | oxygen extraction ratio | ratio between oxygen consumption and oxygen delivery | perioperatively 0-36hrs | |
Secondary | oxygen extraction ratio: estimated and measured | ratio between oxygen consumption and oxygen delivery estimated from blood gases and measured by indirect calorimetry and cardiac output monitoring | perioperatively 0-36hrs | |
Secondary | C(v-a)pCO2/C(a-v)O2 | Ratio: venoarterial pCO2 difference/arterio-venous oxygen content difference | perioperatively 0-36hrs | |
Secondary | postoperative complications | postoperative complications described by Postoperative Morbidity Survey (8) | postoperative days 3,5 and 10 | |
Secondary | mortality | postoperative mortality | postoperative days 30 |
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