Effect of the Height of the Operating Table During Spinal Anesthesia

Seoul National University

Status: Unknown

Conditions: Anesthesia, Spinal [E03.155.086.331]; Operating Tables [E07.325.662]

Treatments: Procedure: Nipple; Procedure: Umbilicus; Drug: Umbilicus Bupivacaine; Procedure: Lowest rib margin; Procedure: Xiphoid; Drug: Nipple Bupivacaine; Drug: Xiphoid Bupivacaine; Drug: Lowest rib margin Bupivacaine

Study type: Interventional

Funder types: Other

Identifiers

NCT02373410

I-2014-6010

Details and patient eligibility

About

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.

Full 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.

Enrollment: 60 estimated patients

Sex: All

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• undergoing elective surgery under spinal anesthesia

Exclusion criteria

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

Trial design

Primary purpose: Diagnostic

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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60 participants in 4 patient groups

Umbilicus

Experimental group

Description:

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.

Treatment:

Drug: Umbilicus Bupivacaine

Procedure: Umbilicus

Lowest rib margin

Active Comparator group

Description:

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.

Treatment:

Drug: Lowest rib margin Bupivacaine

Procedure: Lowest rib margin

Xiphoid

Active Comparator group

Description:

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.

Treatment:

Procedure: Xiphoid

Drug: Xiphoid Bupivacaine

Nipple

Active Comparator group

Description:

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.

Treatment:

Drug: Nipple Bupivacaine

Procedure: Nipple