Medical apparatus and method for closing an aperture in a tissue

A medical apparatus for closing an aperture in a tissue of a patient, wherein the tissue defines at least part of a blood vessel or other body lumen, the medical apparatus comprising:

• closing device holders, each for releasably receiving one or more closing devices, wherein each of the one or more closing devices comprises a staple or a clip made at least partly of a deformable shape memory alloy and/or having a self-expanding shape memory section within the closing device holders in a stressed state such that when the one or more closing devices is manipulated to exit a distal end of the respective closing device holder during use of the medical apparatus, the one or more closing devices releases its stress, or part of it;
• and
• a retracting unit configured to come into contact with opposite sides of the aperture and for retracting the opposite sides of the aperture and/or for spreading the aperture causing the aperture to change its shape into a slit, wherein a multitude of arms are provided to act as the retraction unit or as part thereof;
• wherein the medical apparatus comprises one or more bars or other protrusions that are arranged between or adjacent to openings of the closing device holders for discharging the one or more closing devices, the one or more bars or other protrusions being arranged to protrude over an opening area of at least one of the openings,
• wherein the closing device holders and the multitude of arms of the retracting unit are configured to be inserted into the aperture such that the one or more closing devices, when received in the closing device holders, is deployable, from the distal end of the respective closing device holder, inside of the blood vessel or other body lumen so as to close the aperture from inside of the blood vessel or other body lumen.