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Ephedrine is commonly clinically vasoactive drugs, which can constrict blood vessels and increase blood pressure. Ephedrine can not only stimulate α receptors, but also β receptors, that's to say, it can increase heart rate, stroke volume, and cardiac output, but it also can decrease the level of systemic vascular resistance. This research aims to observe the short-term vasodilator effect of diffierent doses of ephedrine used in elderly patients under general anesthesia in clinical practice, and analyze the main reasons for this phenomenon and take preventive actions to minimize the possibility of further lowering of blood pressure to provide references for clinical rational use of drugs.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ephedrine (4mg) | Experimental |
| |
| ephedrine (8mg) | Experimental |
| |
| ephedrine (12mg) | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Ephedrine | Drug | When elderly patients had hypotension (invasive blood pressure drops >20% from the baseline value or <100 mmHg, or MAP <70mmHg) 20 minutes after anesthesia induction, 4 mg ephedrine in 10 ml saline was usd Intravenously |
| Measure | Description | Time Frame |
|---|---|---|
| The level of systemic vascular resistance | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| Measure | Description | Time Frame |
|---|---|---|
| The level of cardiac output | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Zhuan Zhang, Professor | Contact | +8615062791355 | zhangzhuancg@163.com |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| the Affiliated Hospital of Yangzhou University, Yangzhou University | Recruiting | Yangzhou | Jiangsu | China |
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| ID | Term |
|---|---|
| D004809 | Ephedrine |
| ID | Term |
|---|---|
| D011412 | Propanolamines |
| D000605 | Amino Alcohols |
| D000438 | Alcohols |
| D009930 | Organic Chemicals |
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| Ephedrine | Drug | When elderly patients had hypotension (invasive blood pressure drops >20% from the baseline value or <100 mmHg, or MAP <70mmHg) 20 minutes after anesthesia induction, 8 mg ephedrine in 10 ml saline was usd Intravenously |
|
| Ephedrine | Drug | When elderly patients had hypotension (invasive blood pressure drops >20% from the baseline value or <100 mmHg, or MAP <70mmHg) 20 minutes after anesthesia induction, 12 mg ephedrine in 10 ml saline was usd Intravenously |
|
| during surgery to 30 minutes after being sent to the PACU |
| The level of cardiac index | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| The level of heart rate | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| The level of heart rate cardiac circulation efficiency | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| The level of maximum pressure gradient | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| The level of mean arterial pressure | The outcomes above should be measured at Immediately after the injection of the drug (T1), 30s after the injection (T2), 1 min after the injection(T3), 1 min30 s after the injection(T4), 2 min after the injection(T5), 2 min30s after the injection(T6), 3 min after the injection(T7), 3 min30s after the injection( T8), 4 min after the injection(T9), 4 min30s after the injection(T10), 5 min after the injection(T11), immediately after surgery (T12), 30 min in PACU (T13) | during surgery to 30 minutes after being sent to the PACU |
| The amount of infusion volume,propofol and remifentanil | intraoperative |
| The occurrence of adverse events about the cardiovascular system | Yes or No | from the beginning of the surgery to 30 minutes after being sent to the PACU |
| D020005 |
| Propanols |
| D000588 | Amines |
| D010627 | Phenethylamines |
| D005021 | Ethylamines |