The invention relates to a connector (1) for attaching a reference array (72) in a fixed positional relationship with respect to a patient, wherein the patient is to be covered by a sterile drape in the attachment area, the connector (1) comprising: a support (12) which is to be situated below the drape (30); and a clamping element (14) which is to be situated above the drape and can directly or indirectly hold the reference array (72) or a reference array adaptor, wherein the clamping element (14) clamps the support (12), with the drape (30) caught between the two, by means of at least two distinct clamps (16) which clamp the support (12) from at least partly opposing directions in such a way that the positional shift in the clamping element (14) as a result of clamping the drape (30) at the clamping position is compensated for, such that its overall positional shift is substantially zero. The invention also relates to a connector arrangement (2) comprising such a connector (1) and to a method for attaching a reference array (72) in a fixed positional relationship with respect to a patient.

A mounting is disclosed for securing in place a sheet (56) which constitutes a liner, cover or curtain. The sheet has an elongate attachment zone (60) which is thicker than the material of the sheet. The mounting including a clip (10.2) which is formed with an elongate hollow portion (12) having a longitudinal slit (14) along the length thereof. The attachment zone of the sheet is in the hollow portion of the clip with the sheet emerging from the clip through the slit. A cord (62) is connected to a lashing point (64). The clip (10.2) has a passageway (40) through which the cord (62) passes thereby to attach the clip and the attachment zone to the lashing point.

A mounting is disclosed for securing in place a sheet (56) which constitutes a liner, cover or curtain. The sheet has an elongate attachment zone (60) which is thicker than the material of the sheet. The mounting including a clip (10.2) which is formed with an elongate hollow portion (12) having a longitudinal slit (14) along the length thereof. The attachment zone of the sheet is in the hollow portion of the clip with the sheet emerging from the clip through the slit. A cord (62) is connected to a lashing point (64). The clip (10.2) has a passageway (40) through which the cord (62) passes thereby to attach the clip and the attachment zone to the lashing point.

A curtain system is described which includes a curtain having a plurality of rod engaging members attached thereto, a plurality of rods each having a first end, and a curtain release mechanism attached to each rod at the first end thereof. The rod engaging members each include a stem having a first end and a second end, the first end of the stem configured for engagement with the curtain release mechanism, and a keyway formed in the stem and proximate the first end of the stem.

A curtain system is described which includes a curtain having a plurality of rod engaging members attached thereto, a plurality of rods each having a first end, and a curtain release mechanism attached to each rod at the first end thereof. The rod engaging members each include a stem having a first end and a second end, the first end of the stem configured for engagement with the curtain release mechanism, and a keyway formed in the stem and proximate the first end of the stem.

A track hanger (100) includes a book (103) and an extension (104), a base member (102), and a key (403). The key is detachable from the hook, and the base member is detachable from the extension. The key can include a first major surface (401) and a second major surface (402). The first major surface can define one or more barbs (404) that facilitate one-way insertion of the key into a track (106).