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Cerebrospinal fluid volume is an important factor that influences peak block height and regression of sensory and motor blockade. The aim of this study is to evaluate the effect of dural sac dimension on the spread of spinal anesthesia in elderly patient using ultrasound.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Ultrasound assessment of dural sac dimension | Other | Dural sac dimension is assessed using ultrasonography in the lateral decubitus position for spinal anesthesia. |
| Measure | Description | Time Frame |
|---|---|---|
| Correlation between the dural sac dimension and spinal anesthesia spread (peak sensory block) | The dural sac dimension is assessed before spinal anesthesia. After spinal anesthesia, the sensory and motor level are evaluated. Then, the correlation between the dural sac dimension and spinal anesthesia blockade is assessed. | At 30 minutes after the induction of spinal anesthesia |
| Measure | Description | Time Frame |
|---|---|---|
| Correlation between the dural sac dimension and duration of spinal anesthesia | The sensory and motor regression are assessed. Then, the correlation between the dural sac dimension and the duration of spinal blockade is assessed. | At 30 minutes after the end of surgery |
| Correlation between the dural sac dimension and body mass index |
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Inclusion Criteria:
Exclusion Criteria:
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Female patients older than 65 years of age who are undergoing elective surgery under spinal anesthesia
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| SMG-SNU Boramae Medical Center | Seoul | South Korea |
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Correlation between the dural sac dimension and body mass index is assessed. |
| 5 minutes before spinal anesthesia |
| Correlation between the dural sac dimension and waist circumference | Correlation between the dural sac dimension and waist circumference is assessed. | 5 minutes before spinal anesthesia |
| Correlation between the dural sac dimension and age | Correlation between the dural sac dimension and age is assessed. | 5 minutes before spinal anesthesia |