OBJECTIVE: To determine the degree of adherence to guidelines on the diagnosis of cephalopelvic disproportion (CPD) in Maharaj Nakorn Chiang Mai Hospital.
METHODS: The database ofpregnant women who underwent cesarean delivery due to CPD between 2010 and 2012 was reviewed The degree of adherence to guidelines on the CPD diagnosis was recorded The guidelines were from Royal Thai College of Obstetricians and Gynecologists (RTCOG) and the American Congress of Obstetricians and Gynecologists (ACOG) as gold standard criteria for CPD diagnosis.
RESULTS: Four hundred sixty four pregnant women diagnosed as CPD were recruited. The adherence to guidelines either RTCOG or ACOG criteria was 80.4%. Of 91 cases that had incomplete criteria to diagnose CPD, 25 cases (27.5%) had been suspected offetal macrosomia and CPD was diagnosed during latent phase of labor Unfortunately, 76% of these fetuses had birth weight less than 4000 grams, which were unlikely to be macrosomia.
CONCLUSIONS: The adherence to guidelines on the diagnosis of CPD was 80.4%. Almost one-third of the cases that had no adherence were false diagnosed of fetal macrosomia. Therefore, the strategy of accurate fetal weigh estimation may reduce unnecessary cesarean section from false diagnosis of CPD.

There has been a substantial increase in the use of computed tomography (CT) and magnetic resonance imaging (MRI) in pregnancy and lactation. Among some physicians and patients, however, there are misperceptions regarding risks, safety, and appropriate use of these modalities in pregnancy. We have developed a set of evidence-based guidelines for the use of CT, MRI, and contrast media during pregnancy for selected indications including suspected acute appendicitis, pulmonary embolism, renal colic, trauma, and cephalopelvic disproportion. Ultrasonography is the initial modality of choice for suspected appendicitis, but if the ultrasound examination is negative, MRI or CT can be obtained. Computed tomography should be the initial diagnostic imaging modality for suspected pulmonary embolism. Ultrasonography should be the initial study of choice for suspected renal colic. Ultrasonography can be the initial imaging evaluation for trauma, but CT should be performed if serious injury is suspected. Pelvimetry now is used rarely for suspected cephalopelvic disproportion, but when required, low-dose CT pelvimetry can be performed with minimal risk. Although iodinated contrast seems safe to use in pregnancy, intravenous gadolinium is contraindicated and should be used only when absolutely essential. It seems to be safe to continue breast-feeding immediately after receiving iodinated contrast or gadolinium. Although teratogenesis is not a major concern after exposure to prenatal diagnostic radiation, carcinogenesis is a potential risk. When used appropriately, CT and MRI can be valuable tools in imaging pregnant and lactating women; risks and benefits always should be considered and discussed with patients.

OBJECTIVE: To evaluate the effect of the Clinical Practice Guideline (CPG) for cesarean section due to Cephalopelvic Disproportion (CPD) on physician compliance, pregnancy outcomes and cesarean section rate. The study also wants to identify factors associated with physician non-compliance.
METHODS: 455 medical records of women undergoing a cesarean section due to CPD from January 1, 2002 to December 31, 2003 were reviewed The CPG was implemented on January 1, 2003. The pregnant outcomes of women who delivered from January 1, 2002 to December 31, 2002 were used for comparison. The outcome measurements were physician compliance, pregnancy outcomes and cesarean section rates. Multivariate logistic regression analysis was used to identify factors associated with physician non-compliance. Independent variables included private care, parity, maternal height, Bishop score, maternal age and estimated fetal weight.
RESULTS: The compliance rate was 83%. Physician compliance in private practice was lower than in non-private practice (76.6% VS 92.4%). Pregnancy outcomes were not different between the two periods. The cesarean section rates before and after implementation of the CPG were 8.4% and 8.5%, respectively. Private practice, poor Bishop score and estimated fetal weight < or = 3500 g were significant predictors of physician non-compliance.
CONCLUSIONS: The compliance rate was high, but the cesarean section rate due to CPD did not significantly change within a one year period There was no adverse outcome. Physician non-compliance was more common in private practice. Poor Bishop score and high estimated fetal weight were significant predictors.