What occurs when attempting to pull a hydrophilic-coated guidewire backwards through a needle?

When attempting to pull a hydrophilic-coated guidewire backwards through a needle, it may damage the coating. Hydrophilic coatings are designed to reduce friction and facilitate the movement of the guidewire through vessels and catheters. However, these coatings are also somewhat delicate and can be compromised if the guidewire is pulled backward through a needle.

The process of pulling a hydrophilic-coated guidewire in reverse may cause the coating to rub against the sharp edges of the needle's lumen, leading to potential stripping or peeling of the coating. This can reduce the wire's effectiveness in navigational procedures and increase the risk of complications, such as difficulty in advancing the wire or creating resistance when navigating through vascular structures. Thus, the integrity of the hydrophilic coating is paramount when traversing diagnostic or therapeutic pathways, and caution is required to preserve its properties.