![]() “This is my partner Manuel,” said Eleno over the din, taking us to a big man in bib overalls who was pushing a huge chunk of obsidian into a howling buzz saw - with his bare hands. The air was filled with dust and the roar of spinning grindstones. He led my wife Susy and me into a cinderblock yard partially covered by a tin roof. I confess that I, too, had very little interest in obsidian until the day I walked into Don Eleno’s obsidian workshop in the sleepy village of Navajas, located 30 kilometers southwest of Guadalajara.ĭon Eleno was a little man wearing a sombrero and a warm smile that radiated serenity. Although most obsidian is black, a variety of colors can be found in the vast deposits of Jalisco © John Pint, 2009 The many colors of obsidian As a result, the Tequila-Colli axis became one of the world’s greatest ancient mining zones for this natural glass, providing the pre-Columbian inhabitants of what is now western Mexico with a priceless “gift of the gods,” which dramatically shaped their destiny.Ĭuriously, most of the people living in the Guadalajara area today have never seen an obsidian mine and few would recognize a piece of obsidian lying at their feet even though the ground is strewn with it for at least 100 kilometers west of the city. Less than 90,000 years ago more lava came forth from the Colli area, where today we find the Primavera Forest. West Mexico’s obsidian probably began as lava oozing out of cracks in the side of Tequila Volcano several million years ago, well after the volcano’s more dramatic eruptions into the air. Obsidian forms when lava cools quickly or is degassed in other ways. ![]() The higher the BP the more the bleeding, the lower the coagulation, the less your efforts to stop it will work.The third-largest deposits of obsidian in the world are found west of the city of Guadalajara and are superseded only by the deposits of Africa’s Rift Valley and the Oregon Plateau. This can only be done safely for a short time, but it makes for a surgery with so little blood and its very practicalĬontrol of blood pressure and coagulation is also very important, done by anesthesiologist mainly, before and during the surgery. ![]() You can also use ischaemia systems, it's like using a tourniquet when you have a big wound, well, you can use a tourniquet before making the big wound! You put a pressure cuf on arms or legs when you're going to operate on one, and then use an elastic compressive bandage to squeeze the blood out from the arm/leg before you cut the blood flow to the extremity. Burning sounds very gruesome but it's totally an OK thing even though it may sound scary. The most simple one is simply patting a wound dry with a gauze, this is done over and over, it let's you see what your working with because if something is full of blood, there is no way you can tell where you're going, so we pat and pat and pat and keep it dry and clean and it stops bleeding a lot after a bit, this works for the normal bleeding of skin and muscle from capillaries, if you cut a small artery you will have to deal with it in a different way.Īnother thing that is almost always done is using electric scalpels and cauterizers, after you make the first incision in the skin you can "burn" and coagulate the points that bleed the most and seriously cut down on the bleeding, you can also use the electric scalpel that cuts and burns at the same time and those cuts barely bleed at all. Sometimes the cleanness of the cut will even make you have a small artery squirt a tiny stream of blood.ĭuring surgery this is taken into account and to avoid too much bleeding many strategies are taken into account. Scalpels are super sharp and they will cut blood vessels, once they're cut there isn't much difference as to what cutted them, they just bleed. ![]() I'm a 6th year med student, I've helped in a bunch of surgeries already and they can both be surprisingly clean and lacking blood or leave the OR with squirts of blood everywhere and a ton of gauzes soaked. Long story short, they can do, they sometimes do, but this is taken into account and you work with it. ![]()
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