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Composed of an isotactic crystalline stereoisomer of polypropylene, Prolene sutures are intended to be durable and long lasting. They are dyed blue, allowing for easy visibility against skin and when operating. It is composed of a single filament. A polypropylene mesh Prolene product is used for repairing hernias and other injuries to the fascia.
The PDS suture knots must be properly placed to be secure. Conjunctival and vaginal mucosal sutures remaining in place for extended periods may be associated with localized irritation. Subcuticular sutures should be placed as deeply as possible in order to minimize the erythema and induration normally associated with adsorption.
to keep the eyes open during any operation; light wire instrument Needle holders: holding the needle in position while applying sutures •Silcock's needle holder-do-; has a catch and is used for heavier gauge needles; used mainly for skin, muscle and corneal incisions •Arruga's needle holder
A surgical suture, also known as a stitch or stitches, is a medical device used to hold body tissues together and approximate wound edges after an injury or surgery. Application generally involves using a needle with an attached length of thread. There are numerous types of suture which differ by needle shape and size as well as thread material ...
The extraocular muscles, or extrinsic ocular muscles, are the seven extrinsic muscles of the eye in humans and other animals. [1] Six of the extraocular muscles, the four recti muscles, and the superior and inferior oblique muscles, control movement of the eye. The other muscle, the levator palpebrae superioris, controls eyelid elevation.
The body of the superior oblique muscle is located behind the eyeball, but the tendon (redirected by the trochlea) approaches the eyeball from the front. The tendon attaches to the top (superior aspect) of the eyeball at an angle of 51 degrees concerning the primary position of the eye (looking straight forward). Therefore, the force of the ...
General anaesthesia reduces the tonic contraction of the orbicularis oculi muscle, causing lagophthalmos i.e. the eyelids do not close fully in 59% of patients. [3] In addition, general anaesthesia reduces tear production and tear-film stability, resulting in corneal epithelial drying and reduced lysosomal protection.
The suspensory ligament of eyeball (or Lockwood's ligament) forms a hammock stretching below the eyeball between the medial and lateral check ligaments and enclosing the inferior rectus and inferior oblique muscles of the eye.