Mechanical deformation of posterior thoracolumbar fascia after myofascial release in healthy men: A study of dynamic ultrasound imaging

The maximal renal concentrating ability was studied in six healthy men while 150 ml water/kg body wt. was forced daily for 9 days. The maximally concentrated urine samples were obtained after intramuscular injection of 5 units of surgical Pituitrin on the 3rd, 6th, and 9th day of the forced hydration period. The renal concentrating ability was already reduced on the 3rd day of the forced hydration, and there was very little further reduction during the subsequent period. All urinary constituents lost concentration in parallel. The rates of excretion of various urinary constituents through maximally concentrated urine did not show any consistent change. Moreover, all impairments were reversible and were not accompanied by any alteration in the glomerular filtration rate. It is thus considered that the observed reduction in renal concentrating ability during the forced hydration period is due to the reduction of tubular function. It is postulated that the collecting duct undergoes a certain mechanical deformation during the forced hydration period and, hence, is not able to perform the concentrating operation as much as it would do otherwise. Submitted on August 10, 1961

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P1347A DYNAMIC ULTRASOUND-IMAGING-BASED GUIDED TECHNIQUE TO TUNNELED DIALYSIS CATHETER BY MICROBUBBLES

Nephrology Dialysis Transplantation ◽

10.1093/ndt/gfaa142.p1347 ◽

2020 ◽

Vol 35 (Supplement_3) ◽

Author(s):

Erica Melo ◽

Marcelo Silveira ◽

Sérgio Souza ◽

Ana Baptista ◽

Filipe Miranda ◽

...

Keyword(s):

Ultrasound Imaging ◽

Guide Wire ◽

Accurate Method ◽

Primary Patency ◽

Hemodialysis Catheter ◽

Catheter Malfunction ◽

Dynamic Ultrasound ◽

The Right ◽

Stage Renal Disease ◽

End Stage

Abstract Background and Aims In patients with end-stage renal disease (ESRD), the use of cuffed, tunneled dialysis catheters (TDCs) for hemodialysis has become integral to treatment plans. Fluoroscopy is a widely accepted method for the insertion and positioning of cuffed dialysis catheters, because it is easy to use, accurate and reliable, and has a relatively low incidence of complications. The purpose of our study was to evaluate the feasibility of tunneled hemodialysis catheter placement without the use of fluoroscopy but with a dynamic ultrasound-imaging-based guided technique. Method From January 2015 to December 2017, we performed an observational prospective cohort study of 56 patients with ERDS who required TDC placement. Results The overall success rate for ultrasound-guided central access was 100%, with a mean number of 1.16 (± 0.4) attempts per patient. There were no incidences of guide wire coiling/kinking, carotid puncture, pneumothorax, or catheter malfunction. Catheter flow during dialysis was 286 (± 38) ml/min. The total number of catheter days was 7,451, with a mean of 133 days and a range of 46 to 322 days. Life table analysis revealed primary patency rates of 100%, 96%, and 53% at 30, 60, and 120 days, respectively. Conclusion Dynamic ultrasound-based visualization of microbubbles in the right atrium is a highly accurate method to detect percutaneous implantation of large-lumen, tunneled, central venous catheters without the need for fluoroscopic guidance technology.

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