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Biomedical subjects

J H Cook

Publications and source records attributed to J H Cook.

24 records · Page 2Linked to original sources
PubMed1977

Intraoperative localization of renal calculi during nephrolithotomy by ultrasound scanning.

An ultrasound B-scan probe has proved to be useful in the intraoperative localization of renal calculi. The probe is small, readily available and produces an anatomical cross-sectional image of the kidney. The use of a 10 MHz. frequency probe enables 2 to 3 mm. stones to be detected readily. Calibration of the screen and the use of a fine needle inserted into the kidney under ultrasound control provide for precise 3-dimensional localization of the stone to facilitate its removal. The method has been successful in accomplishing the complete removal of small stones or residual fragments in 7 of 11 patients in whom it has been used. The method requires some experience in the use of the probe and in the interpretation of the ultrasound image.

Adult↗
PubMed1977

Ultrasonic demonstration of intrarenal anatomy.

Intrarenal anatomy including cortex, medulla, and arcuate vessels can be demonstrated with gray scale ultrasonography by using higher frequencies, appropriately focused transducers, and simple sector scans. We have defined this anatomy in three cadaver kidneys, in in vivo normotopic and transplanted kidneys, and in a fetal kidney in utero. The normal cortex is echogenic. The normal medulla is sonolucent and has a characteristic appearance distinguishing it from renal cystic disease. The arcuate vessels can be recognized as a discrete high level echo at the corticomedullary junction and serve as a marker for the evaluation of renal cortical thickness. The ability to identify and characterize intrarenal anatomy should aid in the discovery of smaller renal lesions and in the diagnosis of medical renal disease.

Adolescent↗
PubMedDate not supplied

My own immortality.

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Attitude to Death↗