A pinch clamp comprising: a first arm coupled to a second arm by hinges; wherein each of the first and second arms (101, 102) includes a clamping surface; wherein one of the first or second arms (101, 102) includes at least one opening and the other of the first or second arms (101, 102) includes at least one corresponding retaining tab which inserts through the opening when the first arm is positioned overtop the second arm, the retaining tab interfacing with the opening to prevent the first arm from separating from the second arm; wherein the first arm includes an engaging surface at a terminal end of the first arm, wherein the second arm includes an end wall, having a wall opening configured to receive intravenous tubing, and an engaging ledge extending inwardly from the end wall, wherein when the pinch clamp is disposed in an engaged position, the engaging surface is positioned underneath the engaging ledge to maintain the pinch clamp in the engaged position in which the clamping surfaces are configured to occlude the intravenous tubing when the intravenous tubing is inserted through the pinch clamp wherein the at least one retaining tab comprises opposing retaining tabs, and the at least one opening comprises opposing openings, and wherein each retaining tab includes a ledge which catches on a retaining surface of the corresponding opening, wherein each retaining tab is positioned inside the first arm and the ledge extends outwardly through the corresponding opening such that the retaining tab provides reinforcement against lateral displacement of the first arm, wherein each of the at least one retaining tab includes a clamping ledge that interfaces with the corresponding opening to retain the pinch clamp in an engaged position and wherein each of the at least one retaining tab includes a squeezing surface, characterized in that at least one of the clamping surfaces is angled to cause fluid to flow in a direction towards the end wall as the clamping surfaces progressively occlude the intravenous tubing. a first arm coupled to a second arm by hinges; wherein each of the first and second arms (101, 102) includes a clamping surface; wherein one of the first or second arms (101, 102) includes at least one opening and the other of the first or second arms (101, 102) includes at least one corresponding retaining tab which inserts through the opening when the first arm is positioned overtop the second arm, the retaining tab interfacing with the opening to prevent the first arm from separating from the second arm; wherein the first arm includes an engaging surface at a terminal end of the first arm, wherein the second arm includes an end wall, having a wall opening configured to receive intravenous tubing, and an engaging ledge extending inwardly from the end wall, wherein when the pinch clamp is disposed in an engaged position, the engaging surface is positioned underneath the engaging ledge to maintain the pinch clamp in the engaged position in which the clamping surfaces are configured to occlude the intravenous tubing when the intravenous tubing is inserted through the pinch clamp wherein the at least one retaining tab comprises opposing retaining tabs, and the at least one opening comprises opposing openings, and wherein each retaining tab includes a ledge which catches on a retaining surface of the corresponding opening, wherein each retaining tab is positioned inside the first arm and the ledge extends outwardly through the corresponding opening such that the retaining tab provides reinforcement against lateral displacement of the first arm, wherein each of the at least one retaining tab includes a clamping ledge that interfaces with the corresponding opening to retain the pinch clamp in an engaged position and wherein each of the at least one retaining tab includes a squeezing surface, characterized in that at least one of the clamping surfaces is angled to cause fluid to flow in a direction towards the end wall as the clamping surfaces progressively occlude the intravenous tubing.