What type of injuries increase the risk of HIV transmission?

In the context of HIV transmission, hollow devices refer to instruments like needles that can retain blood within their lumen. These devices can introduce blood directly into a person's bloodstream when used improperly or shared. This characteristic makes injuries caused by hollow devices a significant concern for HIV transmission, as they not only have the potential to penetrate deeply into tissues but also can carry a more substantial volume of infectious fluid, increasing the risk of exposure to the virus.

Other injury types, while relevant in the context of infection control and exposure risk, do not inherently carry the same level of transmission risk as hollow devices. Deep puncture wounds and surgical scalpel cuts can also transmit HIV, but they do not necessarily have the unique feature of containing blood that could have a higher viral load. Superficial abrasions are less likely to transmit HIV because they do not typically result in significant exposure to blood, which is essential for transmission. Therefore, hollow devices stand out as a major concern in the transmission of HIV among the options provided.