Exposure to Ionizing Radiation
Conditions
Keywords
Radiation exposure, ERCP
Brief summary
The objective of this study is to evaluate the radiation dose to patient at two positions (prone and left lateral) and to medical staff during Endoscopic retrograde cholangiopancreatography (ERCP) procedure using dose area product (DAP) meter and thermoluminescent dosimeter (TLD). Data were recorded on 20 patients at prone position and 20 patients at left lateral position.
Detailed description
The radiographic-fluoroscopic system manufactured by Siemens Model POLYSTAR was used for ERCP procedure at King Chulalongkorn Memorial Hospital. Dose Area Product (DAP) manufactured by PTW Model DIAMENTOR E, a transmission ionization chamber was attached to X-ray collimator to record the dose-area (cGy.cm2) in order to determine the entrance surface air kerma (ESAK, mGy) of the patients at two positions (prone and left lateral) while the Kodak Portal Pack for localization imaging was placed on the patient's couch to determine the exposed area (cm2) on the surface of the patient. TLD was attached at five positions, left eye, thyroid, left forearm, lower abdomen and left leg of the medical staff during ERCP procedure.
Interventions
RADIATIONThe radiographic-fluoroscopic system
Fluoroscopy was used during ERCP procedure. With automatic brightness adjustment, patients with thicker body will get greater radiation dose.
Sponsors
Chulalongkorn University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
* Patients with common bile duct (CBD) stone and underwent ERCP * age over 18 years * ASA class I-II
Exclusion criteria
* Pregnant * Abnormal coagulation * ASA class III-IV * Emergency/urgency conditions * Unstable vital signs * Denied to participate the study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Patients' entrance surface dose | within 12 hours after procedure | Transparent ionization chamber was placed at the light beam diaphragm of the x-ray tube to measure the dose in the air and the verification film was placed on the couch at fluoroscopic area to determine exposed area. Patient's dose-area product will express in cGy.cm2. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Endoscopists' radiation dose | Within 12 hours after procedure | Thermoluminescent dosimeters (TLD) were placed at left eye, thyroid, left forearm, lower abdomen, and left leg of endoscopists. The TLDs used in this study was TLD-100 which was lithium fluoride crystal doped with magnesium and titanium (LiF:Mg, Ti). After procedures all labeled TLDs were read by automatic TLD reader (Harshaw 5500, Thermo Scientific Corp., MA, USA). |
Countries
Thailand
Outcome results
None listed