Correlation of the Dural Sac Dimension With the Spread of Spinal Anesthesia

Correlation of the Dural Sac Dimension With the Spread of Spinal Anesthesia in Elderly Patients

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04065763

Enrollment

Registered

2019-08-22

Start date

2019-10-10

Completion date

2020-02-14

Last updated

2020-03-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Elderly Patients

Brief summary

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.

Interventions

OTHERUltrasound assessment of dural sac dimension

Dural sac dimension is assessed using ultrasonography in the lateral decubitus position for spinal anesthesia.

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

FEMALE

Age

65 Years to No maximum

Inclusion criteria

* Patients who are scheduled for elective surgery under spinal anesthesia

Exclusion criteria

* Known anatomical abnormality or pathology in the spine * History of lumbar spinal surgery or compression fracture * Height less than 150 cm

Design outcomes

Primary

Measure	Time frame	Description
Correlation between the dural sac dimension and spinal anesthesia spread (peak sensory block)	At 30 minutes after the induction of spinal anesthesia	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.

Secondary

Measure	Time frame	Description
Correlation between the dural sac dimension and duration of spinal anesthesia	At 30 minutes after the end of surgery	The sensory and motor regression are assessed. Then, the correlation between the dural sac dimension and the duration of spinal blockade is assessed.
Correlation between the dural sac dimension and body mass index	5 minutes before spinal anesthesia	Correlation between the dural sac dimension and body mass index is assessed.
Correlation between the dural sac dimension and waist circumference	5 minutes before spinal anesthesia	Correlation between the dural sac dimension and waist circumference is assessed.
Correlation between the dural sac dimension and age	5 minutes before spinal anesthesia	Correlation between the dural sac dimension and age is assessed.

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026