Effect of the Height of the Operating Table During Spinal Anesthesia

Not Applicable

• Conditions: Anesthesia, Spinal [E03.155.086.331]; Operating Tables [E07.325.662]
• Interventions: Procedure: Umbilicus; Procedure: Nipple; Procedure: Lowest rib margin; Procedure: Xiphoid; Drug: Lowest rib margin Bupivacaine; Drug: Umbilicus Bupivacaine; Drug: Xiphoid Bupivacaine; Drug: Nipple Bupivacaine

• Registration Number: NCT02373410
• Lead Sponsor: Seoul National University Hospital

Brief Summary

The purpose of this study is to analyze the accuracy of needle insertion and the discomfort during different ergonomic conditions faced by anesthesiologists during spinal anesthesia. In particular,the investigators intend to compare the angles between the patients' back and the inserted spinal needle in the coronal plane at different operating table heights.

Detailed Description

Sixty patients will be recruited undergoing elective surgery under spinal anesthesia. The patients will be randomly allocated to one of four groups: Group U, L, X, and N. These acronyms indicate the heights of the operating table which set at the needle insertion point of anesthetists, namely the level of umbilicus, lowest rib margin, xiphoid process, and nipple in a standing posture. The angle between the patient's skin and the spinal needle will be measured by the protractor in the coronal and sagittal plane. The anesthesiologists will be asked to record the subjective general discomfort graded by Numeric Rating Scale. And the degree of neck, lower back, knee, and elbow flexion of the anesthesiologists will be measured by taking pictures during procedure.

Study Timeline

• Status Verified: 2014-09
• Study Start: 2014-09
• Study First Submitted: 2014-11-27
• Study First Submitted QC: 2015-02-26
• Last Update Submitted: 2015-02-26
• Study First Posted: 2015-02-27
• Last Update Posted: 2015-02-27
• Primary Completion: 2015-08
• Study Completion: 2015-08

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

• undergoing elective surgery under spinal anesthesia

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Exclusion Criteria

• body mass index (BMI)>30
• history of spine operation or severe anatomical abnormalities of spine

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Umbilicus	Umbilicus	The height of the operating table which set at the needle insertion point, is the level of umbilicus of the anesthesiologist in a standing posture.
Nipple	Nipple	The height of the operating table which set at the needle insertion point, is the level of nipple of the anesthesiologist in a standing posture.
Lowest rib margin	Lowest rib margin	The height of the operating table which set at the needle insertion point, is the level of lowest rib margin of the anesthesiologist in a standing posture.
Lowest rib margin	Lowest rib margin Bupivacaine	The height of the operating table which set at the needle insertion point, is the level of lowest rib margin of the anesthesiologist in a standing posture.
Umbilicus	Umbilicus Bupivacaine	The height of the operating table which set at the needle insertion point, is the level of umbilicus of the anesthesiologist in a standing posture.
Xiphoid	Xiphoid	The height of the operating table which set at the needle insertion point, is the level of xiphoid of the anesthesiologist in a standing posture.
Xiphoid	Xiphoid Bupivacaine	The height of the operating table which set at the needle insertion point, is the level of xiphoid of the anesthesiologist in a standing posture.
Nipple	Nipple Bupivacaine	The height of the operating table which set at the needle insertion point, is the level of nipple of the anesthesiologist in a standing posture.

Primary Outcome Measures

Name	Time	Method
The angle between the patient's skin and the spinal needle	during procedure

Secondary Outcome Measures

Name	Time	Method
anesthesiologist's subjective discomfort	during procedure
the degree of anesthesiologist's joint flexion	during procedure

Trial Locations

Locations (1)

Seoul National University Bundang Hospital; 🇰🇷 Seongnam, Gyeonggido, Korea, Republic of