Devices and systems to mitigate traumatic brain and other injuries caused by concussive or blast forces

A system comprising:

• a semi-circumferential collar adapted to be worn on the neck of a human subject,
• wherein the semi-circumferential collar comprises a resilient arcuate band having a general C, V, or U-shape and sized to encircle a majority of the neck of the subject and a pair of rigid or semi-rigid side members integral to the resilient arcuate band and having two or more inwardly-directed protuberances that are integral to the semi-circumferential collar;
• and
• a garment with a semi-circumferential sleeve around a neck opening of the garment,
• wherein the semi-circumferential sleeve is adapted to removably receive the semi-circumferential collar to conceal the semi-circumferential collar in the semi-circumferential sleeve with the inwardly-directed protuberances positioned to apply pressure to one or more neck veins of the subject,
• wherein the semi-circumferential sleeve and the semi-circumferential collar are both open at the laryngeal prominence when worn by the subject and when the semi-circumferential sleeve removably receives the semi-circumferential collar, and
• wherein the resilient arcuate band is configured so that when the semi- circumferential collar is applied to the neck, the resilient arcuate band is expanded and spring tension from the expanded resilient arcuate band causes a compressive force that maintains the semi-circumferential collar in place on the neck and applies sufficient pressure via the inwardly-directed protuberances to the one or more neck veins of the subject to restrict blood flow egressing from the head of the subject through the one or more neck veins.

A system comprising:

• a garment having a neck opening and a flap around the neck opening, the garment being configured to be worn by a user so that a neck of a user passes through the neck opening;
• and
• a semi-circumferential collar adapted to be worn on the neck over a layer of fabric of the flap with a remaining portion of the flap being adapted to fold over the semi-circumferential collar to conceal the semi-circumferential collar,
• wherein the semi-circumferential collar comprises a resilient arcuate band having a general C, V, or U-shape and sized to encircle a majority of the neck of the subject and a pair of rigid or semi-rigid side members integral to the resilient arcuate band and having two or more inwardly-directed protuberances that are integral to the semi-circumferential collar,
• wherein the flap and the semi-circumferential collar are both open at a laryngeal prominence of the user when worn by the subject and when the flap is folded over the semi-circumferential collar, and
• wherein the resilient arcuate band is configured so that when the semi-circumferential collar is applied to the resilient arcuate band is expanded and spring tension from the expanded resilient arcuate band causes a compressive force that maintains the semi-circumferential collar in place on the neck and applies sufficient pressure via the inwardly-directed protuberances to the one or more neck veins of the subject to restrict blood flow egressing from the head of the subject through the one or more neck veins.