China
Africa
Explore chapters and articles related to this topic
Urinary system
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
Renal angiography is generally restricted to the diagnosis of renal artery stenosis and occasionally for the diagnosis of difficult space-occupying lesions (renal artery stenosis may be diagnosed less invasively by CT or MRA). It may also be employed in conjunction with renal artery embolisation of inoperable renal tumours to control bleeding and superselective embolisation for severe bleeding following trauma if appropriate, e.g. post-renal biopsy. Fluoroscopy or ultrasound is used during interventional procedures such as nephrostomy tube insertion, percutaneous nephrolithotomy (PCNL) and lithotripsy.
Predicting outcomes in kidney stone endoscopic surgery by rotation forest algorithm
Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2023
Shima Pooyesh, Saghar Foshati, Malihe Sabeti, Hamid Parvin, Alireza Aminsharifi
Percutaneous nephrolithotomy (PCNL) is the standard treatment method for patients with significant renal stones. There are several variables which may affect the postoperative outcomes of PCNL including renal anatomy, stone burden, location of the stone, skeletal abnormalities, and surgeon’s experience. The requirement for the standardisation of reporting the outcomes of PCNL led to the development of nephrolithometry scoring systems. The most commonly used scoring systems are Guy’s stone score, S.T.O.N.E (stone size (S), tract length (T), obstruction (O), number of involved calices (N), and essence of stone density (E)) nephrolithometry score, S-ReSC (Seoul National University Renal Stone Complexity) scoring system, and CROES (Clinical Research Office of the Endourological Society) nephrolithometry nomogram. GSS (Guy scoring system) categorises PCNL complexity into four grades (I, II, III, IV) according to the patients and imaging characteristics. S.T.O.N.E score is calculated using stone size, tract length (skin-to-stone distance), degree of obstruction, number of calyces involved, and stone essence (density). In the CROES nomogram, all variables correspond to a numeric value including the case volume per year, and finally the S-ReSC scoring system was developed to predict the outcomes of PCNL which were performed using only one access. Indeed, preoperative evaluation of the patient with scoring systems is important to predict the success rate and proper preoperative counselling of the patient. Some focused on comparing the efficacy of the four most used scoring systems in predicting PCNL outcomes (Yarimoglu et al. 2017).