Abdominal ultrasonography was carried out on the fasting patients by the same physician, using a Logiq 3 Pro instrument equipped with a 7.5 MHz linear probe and with a 3.5 MHz convex-array probe (GE Healthcare). VAT and SAT were measured 1 cm above the umbilicus. The measurements were taken at the end of expiration and applying a standardized probe pressure. SAT, measured with the 7.5 MHz linear probe, was defined as the distance between the epidermis and the external face of the rectus abdominis muscle; VAT, measured with the 3.5 MHz convex-array probe, was defined as the distance between the anterior wall of the aorta and the posterior surface of the rectus abdominis muscle [19 (link),20 (link)]. Each measurement was taken three times and the mean of the three measurements was entered into the database.
3.5 mhz convex array probe
Manufactured by GE Healthcare
Sourced in United States
The 3.5 MHz convex-array probe is a medical imaging device designed for use with ultrasound systems. It is a transducer that converts electrical energy into high-frequency sound waves and vice versa, enabling the capture of images of internal body structures. The probe operates at a frequency of 3.5 MHz and utilizes a convex-shaped array of piezoelectric elements to generate and receive the ultrasound signals.
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Lab products found in correlation
5 protocols using 3.5 mhz convex array probe
1
Abdominal Ultrasonography for VAT and SAT Measurement
2
Measuring Abdominal Fat Volumes by Ultrasonography
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Abdominal subcutaneous fat (SAT) and abdominal visceral fat (VAT) were measured on fasting patients by the same operator using a Logiq 3 Pro Ultrasonography equipped with a 3.5 MHz convex-array probe and with a 7.5 MHz linear probe (GE Healthcare, Milwaukee, WI, USA) following a validated standardized protocol [46 (link)]. Specifically, SAT was measured as the distance between the epidermis and the external face of the rectus abdominis muscle. VAT was measured as the distance between the anterior wall of the aorta and the posterior surface of the rectus abdominis muscle measured at the level of the xipho-umbilical line or linea alba. The within-day intra-operator coefficient of variation for repeated measures of VAT and SAT in our laboratory is 0.8%.
3
Abdominal Ultrasonography for Adipose Tissue Measurement
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Abdominal ultrasonography was performed on individuals in fasting state using a Logiq 3 Pro equipped with a 3.5 MHz convex-array probe and with a 7.5 MHz linear probe (GE Healthcare, Milwaukee, WI, USA). VAT and SAT thicknesses were measured 1 cm above the umbilicus. The measurements were taken at the end of expiration and applying a standardized probe pressure. SAT, defined as the distance between the epidermis and the external face of the rectus abdominis muscle, was measured with the 7.5 MHz linear probe; VAT, defined as the distance between the anterior wall of the aorta and the posterior surface of the rectus abdominis muscle, was measured with the 3.5 MHz convex-array probe [26 (link), 27 (link)]. Each measurement was taken three times and the mean was calculated.
4
Thoracoscopic and Ultrasound-Guided Biopsy Protocol
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Thoracoscopy was carried out using the following standard instruments: a flexible electronic medical thoracoscope (LTF-240, Olympus, Japan), a disposable trocar for thoracic puncture (Olympus, Japan), pleural biopsy forceps (FB-55CR-1, Olympus, Japan), a surgical kit for closed thoracic drainage, a closed thoracic drainage catheter, a closed drainage bottle, a nasal catheter for oxygen delivery, and an ECG monitor.
Ultrasound-guided cutting-needle biopsy was performed using a GE Voluson E8 color Doppler ultrasonic diagnostic apparatus equipped with a 3.5-MHz convex array probe (General Electric, Schenectady, NY, USA), a Bard biopsy instrument (MG15–22, Bard Biopsy Systems, Tempe, AZ, USA), and a 18G disposable biopsy needle (Bard-Magnum, Bard Biopsy Systems, Tempe, AZ, USA).
Ultrasound-guided cutting-needle biopsy was performed using a GE Voluson E8 color Doppler ultrasonic diagnostic apparatus equipped with a 3.5-MHz convex array probe (General Electric, Schenectady, NY, USA), a Bard biopsy instrument (MG15–22, Bard Biopsy Systems, Tempe, AZ, USA), and a 18G disposable biopsy needle (Bard-Magnum, Bard Biopsy Systems, Tempe, AZ, USA).
5
Standardized Abdominal Fat Measurement
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VAT and SAT were measured by the same operator following a validated standardized protocol [25 (link)] and using a Logiq 3 Pro system for abdominal ultrasonography equipped with a 3.5 MHz convex-array probe and a 7.5 MHz linear probe (GE Healthcare, Milwaukee, WI, USA). VAT was measured as the distance between the posterior surface of the rectus abdominis muscle and the anterior wall of the aorta at the level of linea alba, and SAT was measured as the distance between the external face of the rectus abdominis muscle and the epidermis. Both VAT and SAT were determined three times, one centimetre above the umbilicus, and a mean measurement was computed. The intra-operator coefficient of variation for repeated VAT and SAT measurements in our laboratory is 0.8%. VAT to SAT ratio was also calculated.
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