Step-by-Step Guide: Cleaning, Irrigating, and Dressing a Deep Laceration

Thank you; I was gonna ask 2 quetsions:

1) For irrigation: I know we use sterile saline, but do we need Iodine Bovine for deep lacerations, or it is not needed, StatPearl (Pubmed) says we can use it, but it doesn't say for what depth of wounds we must use or stop using anti-septic as well as Sterile Saline irrigation.

2) For wound closure: At what wound depth, do we need to suture? Again, I can't find exact guideline on this, all text-books look like they are recommending rather than strict instruction on this.

Thank you for very informative video