Comparison of Intraabdominal Pressure (IAP)

Seoul National University

Status: Unknown

Conditions: Prone Position

Treatments: Device: Wilson frame; Device: Jackson surgical table; Device: Chest roll

Study type: Interventional

Funder types: Other

Identifiers

NCT02094976

IAP_protocol

Details and patient eligibility

About

Increased intra-abdominal pressure(IAP) might influence on perioperative morbidity related to increased CVP, PVWP, SVR, PAP and decreased venous return and cardiac output. Prone position has been known to increase IAP. In clinical field, various apparatuses has developed to minimize IAP elevation during prone position operation.

In this study, we would compare the changes of IAP and respiratory system compliance according to positional apparatus in prone position.

Full description

In clinical field, Wison frame, chest rolls and Jackson table have been widely used for prone position surgery. Among those apparatus, Jackson table has padded supports under the chest and pelvis, so that the abdomen can hang freely and prevent the abdominal compression. By reducing abdominal and thoracic pressure, Jackson table would reduce blood loss, and less effects on pulmonary mechanics. But few studies has known to compare IAP with other positioning apparatus such as Wilson frame or chest roll.

Enrollment: 138 estimated patients

Sex: All

Ages: 20 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients who are scheduled for prone positioned spinal surgery
• ASA Physical Status Classification System class I or II

Exclusion criteria

• Patients who did not agree
• BMI > 30kg/m2
• Patients who did not insert urinary foley catheter
• Patients who have COPD or emphysema
• Patients who have severe spine deformities such as scoliosis

Trial design

Primary purpose: Supportive Care

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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138 participants in 3 patient groups

Group C

Active Comparator group

Description:

Group C means active comparator group which use chest rolls intraoperatively for prone position.

Treatment:

Device: Chest roll

Group W

Active Comparator group

Description:

Group W means experimental group which use Wilson frame intraoperatively for prone position.

Treatment:

Device: Wilson frame

Group J

Experimental group

Description:

Group J means experimental group which use Jackson surgical table intraoperatively for prone position.

Treatment:

Device: Jackson surgical table