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Motion of venous valves in humans—a new discovery
Published in Dinker B. Rai, Mechanical Function of the Atrial Diastole, 2022
The data were collected by performing the following procedure.16 The procedure was performed in the X-ray suite under fluoroscopy on a tilt table under local anesthesia. An 18-gauge angio-catheter was introduced into the right internal jugular vein and through that a guidewire 0.032 inches in diameter and then advanced to the area of the right femoral vein. Along the guidewire, using the Seldinger technique a number 6-F size 100-cm-long catheter was introduced into the femoral vein. The guidewire was removed and the contrast medium was injected with a 60 mL syringe in small doses of 10 mL each. The motion in the form of opening and closing of these valves and their relationship to the cardiac cycle and postures were recorded in more than 150 patients.
Diagnostic Imaging Using X-rays
Published in Debbie Peet, Emma Chung, Practical Medical Physics, 2021
Debbie Peet, Richard Farley, Elizabeth Davies
Fluoroscopy enables X-ray imaging to be performed in real time. This can be used to capture moving structures, such as joints, and to track the passage of contrast through the circulatory or digestive system. Fluoroscopy is also used to guide interventional procedures in cardiology and “key-hole” surgery.
Introduction to the Endovascular Suite and Basic Principles of Angiography
Published in Vikram S. Kashyap, Matthew Janko, Justin A. Smith, Endovascular Tools & Techniques Made Easy, 2020
Jason Ty Turner, Virginia L. Wong
Typically, fluoroscopy is utilized for visualizing through body tissues and structures. Stepping on a foot pedal activates the imaging system. A single fluoroscopic image captured by simple press-and-release of the pedal is referred to as a spot image.
Re: Fluoroless endourological surgery for high burden renal and proximal ureteric stones: A safe technique for experienced surgeons
Published in Arab Journal of Urology, 2021
The rational of omitting fluoroscopy to decrease X-ray exposure for the patient and the operating room staff is valid. Some retrospective studies reported radiation-free flexible ureteroscopy [2,3]. However, there are critical steps that need the use of an imaging modality for confirmation of the instruments’ location inside the pelvicalyceal system to ensure optimal safety of the procedure. Despite the report by Aboutaleb [4] that showed the safety of fluoroless UAS insertion, it is dangerous to introduce the sheath up the ureter depending only on tactile feedback. Pulsed fluoroscopy is an alternative to conventional fluoroscopy to decrease X-ray exposure and maintain safety at the same time. Elkoushy et al. [4] reported that pulsed fluoroscopy during ureteroscopy significantly decreased X-ray exposure.
Contact force sensors in minimally invasive catheters: current and future applications
Published in Expert Review of Medical Devices, 2021
Weyland Cheng, Manye Yao, Bo Zhai, Penggao Wang
Fluoroscopy is commonly used to observe the catheter’s location within the body or to assess arterial and cardiovascular structures. However, radiation exposure to the patient and catheter operator can be undesirable consequences when using x-ray imaging. Although operators wear partly protective lead aprons during the procedure, radiation exposure to the head can increase the risk of cataracts, hematological malignancies, and neural tumors [10]. Moreover, constantly wearing heavy lead aprons can lead to the development of chronic back pain and orthopedic injuries [10]. Therefore, minimizing operation time and fluoroscopy duration is necessary for maximizing safety for both the patient and operator. Magnetic resonance (MR) angiography is another option for visual feedback. Yet, drawbacks such as high expense, shielding requirements, and prohibition of using ferromagnetic materials can limit its usage [11].
Fluoroscopy guided percutaneous biopsy in combination with bronchoscopy and endobronchial ultrasound in the diagnosis of suspicious lung lesions – the triple approach
Published in European Clinical Respiratory Journal, 2020
Jatinder Singh Sidhu, Geir Salte, Ida Skovgaard Christiansen, Therese Marie Henriette Naur, Asbjørn Høegholm, Paul Frost Clementsen, Uffe Bodtger
It could be argued, that non-diagnostic bronchoscopy and EBUS should not be followed by F-TTNAB but by more modern sampling guided by electromagnetic navigation bronchoscopy (ENB) and radial ultrasound probe [1,13]. However, in many centres – especially in non-Western countries – these techniques are not available due to the substantial costs for single-purpose equipment. Fluoroscopy is used in several disciplines of medicine and is readily available even in low-income countries. The sampling of peripheral lung lesions guided by CT or fluoroscopy normally requires referral to a radiologist [16], which will cause a delay in the diagnostic workup. A combined, same-day invasive triple approach aiming at both diagnosis and staging will speed up the process. The equipment for fluoroscopy is routinely available in the operating room of the pulmonologist, since it is used when performing transbronchial lung biopsies [13].