112 karma · joined August 3, 2014
To sample the CSF, or to give a spinal anaesthetic, the needle needs to be introduced into the subarachnoid (one of the membranes that surrounds the central nervous system) space, but at a level below where the spinal cord has terminated. This is why they're done in the lower back typically.
Bending over is a totally legitimate way to perform them, and doesn't really alter the complication rate, while making the procedure easier. Also, there isn't really any realistic option to perform them in real time with imaging guidance. The author is right in that larger cutting needles are associated with increased rates of PDPH.
[1]: https://www.glfharris.com/posts/2024/low-background-lexicogr...
Arguably shock wave lithotripsy, a common method for breaking up kidney stones, could be described as focused ultrasound.
Screening programmes need to be carefully thought out, not only from a cost-benefit, but from an actual risks vs benefits perspective.
In one, I found a stockbrocker's letter and managed to trace the owner to his historic pubmed articles (all > 100 years old), as well as obituaries and probable descendants on WikiTree.
Yes, it's useful to have that knowledge already, and to that I'd say that copying out a textbook is a poor way to learn. It's far better to know the processes behind things or to learn through experience.
It doesn't really aid understanding, doesn't incorporate active recall, and tends to become inefficient for a large corpus of knowledge.
Poland can't afford to donate it's air power so readily, but the USA allows them to with this move. It will also shift their military to be more on spec with other NATO countries.
Part of the sluggishness has been the desire for the "targeted strike", something that appears to have been reversed with the less discriminate bombing of the last 24 hours.
No, they don't have exactly the book I've been looking for. But occasionally they have absolute gems that I'd never have found independently.