Role Of Shear Wave Elastography In Assessment Of Placental Elasticity In Normal And High-Risk Pregnancies In Third Trimester.

Objective: To assess the elasticity of placenta using shear wave elastography in normal and high-risk pregnancies in the third trimester. METHODS: The prospective, observational study was conducted at the Dow Institute of Radiology, Dow University of Health Sciences, Karachi, from September 15, 2022, to January 15, 2023, and comprised singleton pregnant women during 28-40 weeks of gestation who were referred from the obstetric department. The subjects were divided into normal pregnancy group A and high-risk pregnancy group B. Risk factors include gestational hypertension, gestational diabetes, intrauterine growth restriction, placenta previa, morbidly adherent placenta, old primigravida, teen age and morbid obesity were noted. All the patients underwent grey scale, Doppler ultrasonography and shear wave elastography. Data was analysed using SPSS 26. RESULTS: Of the 104 subjects, 78(75%) were in group A and 26(25%) were in group B. The overall mean age was 34.2±3.59 years. In group B, mean placental shear wave velocity was 2.34±1.17m/sec and elasticity was 24.41±25.51kPa compared to 1.42±0.55 m/sec and 13.6±10.23kPa in group A (p<0.05). Significant positive correlation was found between shear wave velocity and elasticity values in both groups (p<0.001). Conclusion: Shear wave elastography was found to be a useful technique in detecting placental stiffness, and can be used as an adjunct to the currently available ultrasonographic methods in high-risk pregnancies.

Value of Periappendiceal Fat Sign on Ultrasound in Acute Appendicitis.

Introduction Acute right lower quadrant abdominal pain is one of the most common surgical presentations to the emergency department with acute appendicitis being the topmost differential diagnosis. Although computed tomography (CT) is the gold standard in diagnosing appendicitis, in our setup ultrasound is often the initial imaging modality available in urgent care settings especially for children and pregnant females. On ultrasound, an inflamed appendix has a diameter of 6 mm or more and is non-compressible. Increased periappendiceal fat echogenicity is an important ancillary sign of acute appendicitis that supports the sonographic diagnosis of acute appendicitis. To determine the association of periappendiceal fat echo sign (PFES) on ultrasound in surgically proven cases of acute appendicitis. Methods This cross-sectional study was held at the Department of Radiology at the Aga Khan University Hospital in Karachi, Pakistan. Periappendiceal fat echogenicity was assessed and prospectively graded in 59 patients. These patients had sonographic features of acute appendicitis which was later confirmed by surgery. Data were collected on a proforma and later analyzed. Frequency of increased periappendiceal fat echogenicity in acute appendicitis was calculated. Association of PFES with gender and ascites was evaluated with Fischer's exact test and with patient's age and appendiceal diameter was assessed using analysis of variance (ANOVA). Results Increased periappendiceal fat echogenicity was seen in 89.8% of patients with acute appendicitis. 10.2% of patients had acute appendicitis with normal surrounding fat. Mean appendiceal diameter in patients with grade 3 PFES was significantly more than those with grade 2 or grade 1 PFES. PFES had no association with age and gender of the patient or with ascites. Conclusion Increased periappendiceal fat echogenicity is an important ancillary sign of acute appendicitis that helps support its sonographic diagnosis.

Embolization with Histoacryl Glue of an Anastomotic Pseudoaneurysm following Surgical Repair of Abdominal Aortic Aneurysm.

We report a 62-year-old female who had surgical repair of abdominal aortic aneurysm with a bifurcated graft 2 years ago. She presented with a distal anastomotic pseudoaneurysm which was successfully embolized with histoacryl glue. Only one such similar case has been reported in the literature so far (Yamagami et al. (2006)).