A device for a respiration arrangement comprising: - a conduit having a first opening connectable to an air/gas source such as a resuscitation bag, and a second opening connectable to a patient interface such that a fluid pathway along a longitudinal direction of the conduit is established from the first opening to the second opening; - a flow constriction arranged in the conduit which upon fluid flow through the conduit results in a pressure difference over the flow constriction, wherein the flow constriction at least partly comprises a laminar flow section, wherein the device further comprises at least one pressure connecting port arranged in pressurized communication with fluid between the flow constriction and the first opening, the pressure connecting port being connectable to a pressure sensor for measuring fluid pressure, and wherein the pressure connecting port is arranged in the longitudinal direction of the conduit and wherein the device further comprises at least one flow guiding element arranged in the conduit between the first opening and the flow constriction, and configured to guide fluid flow to the flow constriction, characterized in that the flow guiding element comprises: - a shielding portion arranged in the conduit to cover an inlet of the pressure connecting port, - a fluid passage enabling fluid flow between the first opening and the flow constriction, and - at least one pressure conduit arranged to provide a fluid channel between the fluid passage and the pressure connecting port. - a conduit having a first opening connectable to an air/gas source such as a resuscitation bag, and a second opening connectable to a patient interface such that a fluid pathway along a longitudinal direction of the conduit is established from the first opening to the second opening; - a flow constriction arranged in the conduit which upon fluid flow through the conduit results in a pressure difference over the flow constriction, wherein the flow constriction at least partly comprises a laminar flow section, wherein the device further comprises at least one pressure connecting port arranged in pressurized communication with fluid between the flow constriction and the first opening, the pressure connecting port being connectable to a pressure sensor for measuring fluid pressure, and wherein the pressure connecting port is arranged in the longitudinal direction of the conduit and wherein the device further comprises at least one flow guiding element arranged in the conduit between the first opening and the flow constriction, and configured to guide fluid flow to the flow constriction, characterized in that the flow guiding element comprises: - a shielding portion arranged in the conduit to cover an inlet of the pressure connecting port, - a fluid passage enabling fluid flow between the first opening and the flow constriction, and - at least one pressure conduit arranged to provide a fluid channel between the fluid passage and the pressure connecting port. wherein the flow constriction at least partly comprises a laminar flow section, wherein the device further comprises at least one pressure connecting port arranged in pressurized communication with fluid between the flow constriction and the first opening, the pressure connecting port being connectable to a pressure sensor for measuring fluid pressure, and wherein the pressure connecting port is arranged in the longitudinal direction of the conduit and wherein the device further comprises at least one flow guiding element arranged in the conduit between the first opening and the flow constriction, and configured to guide fluid flow to the flow constriction, characterized in that the flow guiding element comprises: - a shielding portion arranged in the conduit to cover an inlet of the pressure connecting port, - a fluid passage enabling fluid flow between the first opening and the flow constriction, and - at least one pressure conduit arranged to provide a fluid channel between the fluid passage and the pressure connecting port. - a shielding portion arranged in the conduit to cover an inlet of the pressure connecting port, - a fluid passage enabling fluid flow between the first opening and the flow constriction, and - at least one pressure conduit arranged to provide a fluid channel between the fluid passage and the pressure connecting port.