28 November 2022: Clinical Research
Ultrasonographic Carotid Artery Flow Measurements as Predictors of Spinal Anesthesia-Induced Hypotension in Elderly Patients: A Prospective Observational Study
Hyae-Jin Kim 1ABEF , Ah-Reum Cho 12ACDE* , Hanbit Lee 1ABEF* , Haekyu Kim 12DEF , Jae-Young Kwon 12DEF , Hyeon-Jeong Lee 12DEF , Christine Kang 3BE , Soeun Jeon 4BDEF , Nara Kim 1BEDOI: 10.12659/MSM.938714
Med Sci Monit 2022; 28:e938714
Table 4 Ultrasonographic carotid artery measurements and intraoperative data in patients with and without spinal anesthesia-induced hypotension.
| Factor | Non-hypotension (n=33) | Hypotension (n=17) | P value |
|---|---|---|---|
| Corrected carotid flow time (ms) | |||
| Baseline | 367.4±50.4 | 349.7±20.5 | 0.171 |
| Semirecumbent | 351.8±23.2 | 343.3±20.0 | 0.201 |
| Supine, legs elevated | 366.7±32.0* | 356.3±20.5* | 0.229 |
| 1 min after intrathecal injection | 362.8±32.3 | 352.4±16.9 | 0.219 |
| Carotid blood flow (mL/min) | |||
| Baseline | 605.4±160.3 | 516.7±149.1 | 0.064 |
| Semirecumbent | 555.4±121.2 | 456.0±126.2 | 0.009 |
| Supine, legs elevated | 563.3±153.9 | 504.5±177.7 | 0.230 |
| 1 min after intrathecal injection | 562.6±183.8 | 489.9±193.1 | 0.199 |
| Percent change during PLR test | |||
| Corrected carotid flow time | 4.8 (0.2–7.6) | 3.4 (0.4–8.0) | 0.767 |
| Carotid blood flow | 1.4 (−9.2–14.4) | 14.6 (−14.2–28.3) | 0.341 |
| Level of sensory block | |||
| 5 min | T8 (T8–T9) | T8 (T5–T8) | 0.012 |
| 15 min | T5 (T4–T6) | T4 (T4–T6) | 0.146 |
| Fluid administration | |||
| During intrathecal injection (mL) | 320.0 (293.8–350.0) | 335.0 (292.5–346.3) | 0.976 |
| After intrathecal injection (mL) | 35.0 (33.0–37.0) | 236.0 (232.0–238.0) | |
| Data are mean±standard deviation, median (interquartile range). PLR – passive leg raise; T – thoracic spine. * | |||