I'm a new RN & my question is this: why do we pack wounds instead of just covering the wound with a sterile dressing? The other day I had a pt. who had a sigmoid resection and after the docs removed her staples, her wound opened up on her abdomen, so we were packing it with sterile gauze and then covering it with a dressing. I just am curious as to why we pack wounds, like what is the scientific reason behind it. Thanks!