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  • DavidD477 commented on Lftndbt's instructable Stitch Yourself Shut- Surgery at Home.1 year ago
    Stitch Yourself Shut- Surgery at Home.

    The needle should go through all three layers of skin and sit just above the fat layer. Stitching 'too deep' is only an issue if you jam the needle in somewhere you shouldn't, in which case you'll know about it. The only real problem with stitching through the fat layer and into muscle is that the stitches may be less effective at pulling the skin together. This is one of the reason professional suture needles are curved; you want to 'hook' the dermal layer on one side and then on the other then pull it together with your suture (thread), fishing line and dental floss are two good DIY alternatives to medical suture.If you can't see the fat layer on a cut (unless it's to a hand or somewhere where there is extremely little body fat) you're most likely best off using glue.

    A rat can't give consent so you run the risk of being prosecuted for animal cruelty and as well wishing as you may be, if it makes it to the papers the public will not see you in a good light.However ketamine would be the best anaesthetic agent. About 50mg intramuscular (injected into the thigh using a high gauge needle (27g or higher considering the size of an average rat) should keep a rat out for about twenty minutes. As for stitches, they're likely going to be more trouble than they're worth, try and keep the cut as straight as possible and glue it (use cyanoacrylate glue AKA super glue, do not let cyanoacrylate come into contact with cotton).

    The needle should go through all three layers of skin and sit just above the fat layer. Stitching 'too deep' is only an issue if you jam the needle in somewhere you shouldn't, in which case you'll know about it. The only real problem with stitching through the fat layer and into muscle is that the stitches may be less effective at pulling the skin together. If you can't see the fat layer on a cut (unless it's to a hand or somewhere where there is extremely little body fat) you're most likely best off using glue.

    You should have used glue. Much less invasive for a small cut like that.

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  • DavidD477 commented on backbeats's instructable Make a Contact Microphone2 years ago
    Make a Contact Microphone

    Probably not since the sound is made by the tap dancer's shoes clicking off the surface, standard microphones (directional microphones with a cat's tail over it) should work better think of the surface of the floor as a percussion instrument and the shoes as drumsticks attaching one to a drum-skin wouldn't work well, but attaching it to the wooden body would. If you attached contact mics to the wall just above the floor they might work but if you want the sound re-created perfectly you're better off with conventional mics, probably two front and two rear for even sound distribution.

    Hot glue is an electrical insulator, it wouldn't work well in place of solder. A soldering iron and solder cost under £10 or approx $10, not a big expense and you'll probably find yourself mending good earphones that broke at the jack from metal fatigue, a soldering iron saved an expensive computer headset multiple times as the wire kept getting pulled when I stood up if it was caught on something; you'll find that you end up mending items that you'd usually throw out and re-purchase, usually at a much higher price than the soldering iron and solder. Some flux; even though most soldering wire is coated in a bit of flux using soldering flux means you get better connections on some metals which seem to repel solder otherwise.

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