The application describes an adjustable arm for a patient monitoring device to be placed on a surface portion of a patients body, said arm comprising: at least first and second arm parts abase to which the first arm part is connected and which includes mounting means for mounting it relative to a patient support platform and holding means for receiving the patient monitoring device, to which the second arm part is connected the arm parts, the base and the holding means being articulated by means of joints therebetween, which joints are fixable against movement when the patient monitoring device is in use wherein the joints between the first arm part and the base and between second arm part and the holding means comprise multidirectional joints wherein the base has a fixed portion and a tillable portion, the fixed portion comprising the mounting means and the first arm part being connected to the tillable portion, whereby when the said joints are fixed the adjustable arm can maintain the patient monitoring device in position on the patient surface portion while allowing for movement of the patient monitoring device due to respiration.
