<P> While devices for circular end - to - end anastomosis of digestive tract are widely used, in spite of intensive research circular staplers for vascular anastomosis never had yet significant impact on standard hand (Carrel) suture technique . Apart from the different modality of coupling of vascular (everted) in respect to digestive (inverted) stumps, the main basic reason could be that, particularly for small vessels, the manuality and precision required just for positioning on vascular stumps and actioning any device cannot be significantly inferior to that required to carry out the standard hand suture, then making of little utility the use of any device . An exception to that however could be organ transplantation where these two phases, i.e. device positioning at the vascular stumps and device actioning, can be carried out in different time, by different surgical team, in safe conditions when the time required does not influence donor organ preservation, i.e. at the back table in cold ischemia condition for the donor organ and after native organ removal in the recipient . This is finalized to make as brief as possible the donor organ dangerous warm ischemia phase that can be contained in the couple of minutes or less necessary just to connect the device's ends and actioning the stapler . </P> <P> Although most surgical staples are made of titanium, stainless steel is more often used in some skin staples and clips . Titanium produces less reaction with the immune system and, being non-ferrous, does not interfere significantly with MRI scanners, although some imaging artifacts may result . Synthetic absorbable (bioabsorbable) staples are also now becoming available, based on polyglycolic acid, as with many synthetic absorbable sutures . </P> <P> Titanium staples are not suspected of causing nickel reactions because nickel is rarely if ever used in titanium alloys . </P> <P> Where skin staples are used to seal a skin wound it will be necessary to remove the staples after an appropriate healing period, usually between 5 and 10 days, depending on the location of the wound and other factors . The skin staple remover is a small manual device which consists of a shoe or plate that is sufficiently narrow and thin to insert under the skin staple . The active part is a small blade that when hand - pressure is exerted it pushes down on the staple and pushes it through a slot in the shoe and deforms the staple into an' M' shape to facilitate its removal, although in an emergency it is possible to remove them with a pair of artery forceps . Skin staple removers are manufactured in many shapes and forms, some disposable and some reusable . </P>

Why do they put staples in your head