WO2022021172A1

WO2022021172A1 - Dual-purpose band for securing a cannula and for hemostasis

Info

Publication number: WO2022021172A1
Application number: PCT/CN2020/105666
Authority: WO
Inventors: Hao Zhang; Min Hu; Thorsten TIMM; Kirill Koulechov; John VIERO; Xiaowei Zhang; Yuying Fan; Xiaoqi Xu; Hweeyee TEE; Maosong Wu; Peijie XIE; Heqing Huang; Jiaming Dong; Rudolph JAKOB; Nadine KUBAT; Ben KUBLER; Nicki Sutton
Original assignee: Fresenius Medical Care Deutschland Gmbh; Fresenius Medical Care AG & Co. KGaA; Fresenius Medical Care R&D (Shanghai) Co., Ltd.; Fresenius Medical Care Asia Pacific Ltd.; Fresenius Medical Care (Shanghai) Co., Ltd.
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2022-02-03

Abstract

A dual-purpose band (1) for securing a cannula (2) to a patient's body and for hemostasis, wherein the dual-purpose band (1) is made of a flexible material and comprises means for removably affixing the dual-purpose band (1) to the cannula (2) or to an element, preferably a swab (7), used for hemostasis. The dual-purpose band (1) is used for securing a cannula (2) to a patient's body and for hemostasis, in particular for securing an element used for hemostasis, preferably a swab (7), to the patient's body.

Description

DUAL-PURPOSE BAND FOR SECURING A CANNULA AND FOR HEMOSTASIS

TECHNICAL FIELD

The present invention relates to a dual-purpose band for securing a cannula to a patient’s body and for hemostasis.

BACKGROUND

In the course of the most medical interventions, cannulation is performed to generate an access to the patient’s body, for example, to withdraw blood samples, withdraw blood for blood purification, as for hemodialysis treatments or administer substances to the patient.

Each cannula typically comprises a needle. The cannula including the needle is attached to a tube. Once the patient is cannulated, the needle has to be secured in place to avoid slipping of the needle from the patient’s body and thus to reduce the risk of contamination and blood loss.

For this purpose, conventionally, the needle and /or the tube are affixed to the patient by the use of tape. In practice, however, the application of tape has proved to be rather unpleasant for the patient and cumbersome for medical personnel. . With the present invention the use of tape can be reduced. A lower consumption of tape also means a reduced amount of waste at the same time.

For hemostasis, especially for attaching a swab to a patient’s body after removal of a cannula, conventionally bands are used or the patients themselves have to press the swab on the spot (s) until the bleeding is stopped. At worst, the personal themselves have to take over the hemostasis, which means, that they have to stand at patients side up to 10 min or longer. However, conventionally the use of such bands is strictly limited to hemostasis because of concerns that the bands apply an excessive or unsuitable amount of pressure to a cannulation site. In other words, there has been a bias in the prior art that such bands are unsuitable for more sensitive applications such as cannulation, especially for hemodialysis patients, due to the fact that for hemodialysis an arteriovenous fistula or an arteriovenous shunt is used, which is much more sensitive than a vein.

SUMMARY

It is the object of the present invention to alleviate or even completely abolish the disadvantages of the prior art. In particular, it is an object of the present invention to provide a more convenient means for securing a cannula to a patient’s body and to circumvent the abovementioned disadvantages for patients and/or dialysis staff regarding the hemostasis.

This object is achieved by a dual-purpose band according to the present invention that can be used for cannulation and for hemostasis.

A dual purpose band according to the present invention is made of a flexible material and comprises means for removably affixing the band to the cannula or to an element, preferably a swab, used for hemostasis.

In principle, the dual purpose band according to the present invention can also comprise means for fixedly affixing the band to the cannula or to an element, preferably a swab, used for hemostasis.

For, example, one end of the band can be fixedly attached to the cannula or the element used for hemostasis. Also, it would be possible to fixedly affix the band to the cannula or the element for hemostasis on both ends, if the band is sufficiently elastic to be arranged around a patient’s arm.

Preferably, the band is made of an elastic polymer, preferably of silicone. Preferably, the polymer is particularly configured in terms of its chemical composition /surface properties to come into direct skin-contact with a human being and thus is for example anti-allergenic and well-tolerated by the skin. Further features of the band could be that it is manufactured of an anti-bacterial material or comprises an anti-bacterial surface coating and that it is easy to disinfect.

Preferably, the means for removably affixing the band to the cannula or to the element used for hemostasis comprise at least one recess or opening in the band and /or at least one protrusion on the band and /or at least one element of a press-button and /or at least one loop or hook.

The recess can be for example a groove in the band configured to receive a clamping bar or locking bracket present on the cannula or to the element used for hemostasis to affix the band to the cannula or to the element used for hemostasis.

The at least one recess /opening can be configured to receive a corresponding protrusion present on the cannula or to the element used for hemostasis to affix the band to the cannula or to the element used for hemostasis by a form-fit mechanism.

Further it is possible to affix the band to the cannula or to the element used for hemostasis by use of a press-button. In this case, both the band and the cannula or the element used for hemostasis each comprise a corresponding component of the press-button.

Alternatively or additionally, the band and /or the cannula or the element used for hemostasis can be equipped with hooks and /or loops for affixing the band to the cannula or to the element used for hemostasis.

It has proved advantageous in practice if the band comprises multiple means for removably affixing the band to the cannula or to the element used for hemostasis.

This offers the advantage that the pressure to be applied by the band on to the patient`s body can be adjusted by determining which means for removably affixing the band to the cannula or to the element used for hemostasis is used to removably affix the band to the cannula or to the element used for hemostasis.

In other words, the fit of the band e.g. around a patient’s arm can be loosened or tightened as desired by choosing a particular means for affixing the band to the cannula or to the element used for hemostasis.

The band can comprise at least one means for removably affixing the band to the cannula or to the element used for hemostasis at one end or at both ends of the band.

For example, at a first end of the band the band can comprise only one means for affixing the band to the cannula or to the element used for hemostasis and at the second end of the band the band can comprise multiple means for affixing the band to the cannula or to the element used for hemostasis.

This has the advantage that the band can quickly be affixed to the cannula or to the element used for hemostasis at the first end and the fit of the band can be adjusted by choosing a particular means of the multiple means for affixing the band to the cannula or to the element used for hemostasis at the second end of the band for adjusting the fit of the band, e.g. around a patient’s arm.

A second advantage of this embodiment lies in that the length of loose ends of the band can be minimized because the band is attached to the cannula or to the element used for hemostasis at the first end in a fixed position (only one means for affixing) .

Alternatively, both ends of the band can comprise multiple means for affixing the band to the cannula or to the element used for hemostasis or both ends can comprise only one means for affixing the band to the cannula or to the element used for hemostasis ( “fixed size” -band) .

Furthermore, it has proven advantageous in practice if the band comprises patient data, preferably in the form of a marking on the band or encoded data, indicating for a particular patient a particular means for removably affixing the band to the cannula or to the element used for hemostasis to be used to removably affix the band to the particular patient.

For example, the band can comprise a marking indicating that a particular patient (e.g. patient 1) requires a certain setting of the band (affixing the band to the cannula or to the element used for hemostasis using the third means (e.g. opening in the band) from the second end) . In this way, the band can be customized to the needs of a specific patient.

The marking can take the form of a color code (the means in red is to be used for patient 1, the means in green for patient 2 etc. ) .

The marking can also indicate which means for removably affixing the band to the cannula or to the element used for hemostasis are to be used for which application, e.g. the means in red are to be used for cannulation, the means in green are to be used for hemostasis etc. The invention is not limited to color codes and any other markings can be used.

For example, a tight fit of the band may be required for hemostasis, so means for removably affixing the band to the cannula or to the element used for hemostasis that ensure such a tight fit are marked accordingly.

During cannulation, it is essential not to apply too much pressure onto the cannulation site, so a looser fit is more advantageous and thus means for removably affixing the band to the cannula or to the element used for hemostasis that ensure such a looser fit are marked accordingly.

Although for many applications it may be more advantageous if the band can be removably affixed to the cannula or to the element used for hemostasis, in principle the band can also be permanently affixed to the cannula or to the element used for hemostasis at one end of the band.

Another aspect of the invention relates to a system comprising a cannula and a dual-purpose band according to the invention, wherein the cannula comprises at least one means for removably affixing the band to the cannula, preferably comprising at least one recess or opening in the cannula and /or at least one protrusion on the cannula and /or at least one element of a press-button and /or at least one loop or hook.

The means for removably affixing the band to the cannula present on the cannula preferably is configured to interact /cooperate with a corresponding means present on the band to removably affix the band to the cannula.

In an advantageous embodiment, the cannula comprises two cannula wings and the at least one means for removably affixing the band to the cannula is arranged on at least one cannula wing or on both cannula wings.

In other words, the cannula can comprise at least one means for removably affixing the band to the cannula on at least one cannula wing. On the other hand, each cannula wing can comprise one or more means for removably affixing the band to the cannula.

The secure the band to the cannula, the cannula can further comprise locking means for locking the band to the cannula once the band is removably affixed to the cannula.

For example, the locking means can take the form of a clamping bar or locking bracket that holds /clamps the band in place once it has been removably affixed to the cannula. The clamping bar can press down on to the band to prevent slipping of the band from the cannula.

Another aspect of the invention relates to a system comprising an element used for hemostasis, preferably a swab, and a dual-purpose band according to the present invention, wherein the element comprises at least one means for removably affixing the band to the element, preferably comprising at least one recess or opening in the element and /or at least one protrusion on the element and /or at least one element of a press-button and /or at least one loop or hook.

The system comprising an element used for hemostasis, preferably a swab, and a dual-purpose band according to the present invention can comprise the same features as described above with reference to a cannula, the only difference lies in that the cannula is substituted by an element used for hemostasis.

The means for removably affixing the band to the element used for hemostasis present on the element used for hemostasis preferably is configured to interact /cooperate with a corresponding means present on the band to removably affix the band to the element used for hemostasis.

In an advantageous embodiment, the element used for hemostasis comprises two opposing end portions and the at least one means for removably affixing the band to the element used for hemostasis is arranged on at least one end portion or on both end portions.

The element used for hemostasis can have an elongated, rectangular or circular shape. The shape of the element used for hemostasis is arbitrary and can vary depending on the application.

In other words, the element used for hemostasis can comprise at least one means for removably affixing the band to the element used for hemostasis on at least one end portion.

On the other hand, each end portion can comprise one or more means for removably affixing the band to the cannula.

The element used for hemostasis can be a disposable or a multi-use element. Similarly, the cannula can be a disposable or a multi-use element.

The element used for hemostasis preferably further comprises locking means for locking the band to the element used for hemostasis once the band is removably affixed to the element used for hemostasis.

The locking means can take the form of a clamping bar or locking bracket that holds /clamps the band in place once it has been removably affixed to the element used for hemostasis.

Another aspect of the invention relates to the use of a dual-purpose band according to the present invention for securing a cannula to a patient’s body and for hemostasis, in particular for securing an element used for hemostasis, preferably a swab, to the patient’s body.

In other words, the same band is used for securing a cannula to a patient’s body and for securing an element used for hemostasis, preferably a swab, to the patient’s body.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages, features and effects of the invention become apparent from the following detailed description of an embodiment referring to Figs. 1 and 2. The same or similar elements are denoted in the figures by the same reference numerals.

Fig. 1 shows a system according to the present invention comprising a dual-purpose band and a cannula, and

Fig. 2 shows a system according to the present invention comprising a dual-purpose band and an element used for hemostasis, in this case a swab.

DETAILED DESCRIPTION

As can be seen in Fig. 1, a dual-purpose band 1 is removably affixed to a cannula 2.

The dual-purpose band 1 is made of elastic silicone and comprises ten openings 3 at a first end of the band 1 and two openings 3 at a second end of the band.

The cannula 2 comprises two cannula wings 4 each comprising two protrusions 5 that can be inserted into two corresponding openings 3 of the band 1 to affix the band 1 to the cannula 2.

The cannula 2 further comprises a tube 6 to administer or withdraw fluids to /from a patient.

As can be seen in Fig. 2 a dual-purpose band 1 is removably affixed to a swab 7. The swab 7 comprises a pad 8 made of an absorbent material to absorb blood or another fluid and a fixation element 9 used to fixate the pad 8 to a patient’s body.

The fixation element 9 can comprise a portion 10 into that the pad 8 can be inserted /embedded. The portion 10 comprises a cavity (at the lower side of the fixation element 9 in Fig. 2 and thus not visible in the figure) for receiving the pad 8.

The swab 7 comprises two opposing end portions one of which comprises two protrusions 5 that can be inserted into two corresponding openings 3 of the band 1 to affix the band 1 to the swab 7.

At the other opposing end, the band 1 is clamped to the swap 7 or otherwise affixed to the swab 7.

Claims

Dual-purpose band for securing a cannula to a patient’s body and for hemostasis, wherein the band is made of a flexible material and comprises means for removably affixing the band to the cannula.
Dual-purpose band for securing an element, preferably a swab, used for hemostasis to a patient’s body, wherein the band is made of a flexible material and comprises means for removably affixing the band to the element used for hemostasis.
Dual-purpose band according to claim 1 or 2, wherein the band is made of a polymer, preferably of silicone.
Dual-purpose band according to one of the preceding claims, wherein the means for removably affixing the band to the cannula or to the element used for hemostasis comprise at least one recess or opening in the band and /or at least one protrusion on the band and /or at least one element of a press-button and /or at least one loop or hook.
Dual-purpose band according to one of the preceding claims, wherein the band comprises multiple means for removably affixing the band to the cannula or to the element used for hemostasis wherein the pressure to be applied by the band on to the patient`s body can be adjusted by determining which means for removably affixing the band to the cannula or to the element used for hemostasis is used to removably affix the band to the cannula or to the element used for hemostasis.
Dual-purpose band according to one of the preceding claims, wherein the band comprises at least one means for removably affixing the band to the cannula or to the element used for hemostasis at one end or at both ends of the band.
Dual-purpose band according to one of the preceding claims, wherein the band comprises patient data, preferably in the form of a marking on the band or encoded data, indicating for a particular patient a particular means for removably affixing the band to the cannula or to the element used for hemostasis to be used to removably affix the band to the particular patient.
System comprising a cannula and a dual-purpose band according to one of the preceding claims, wherein the cannula comprises at least one means for removably affixing the band to the cannula, preferably comprising at least one recess or opening in the cannula and /or at least one protrusion on the cannula and /or at least one element of a press-button and /or at least one loop or hook.
System according to claim 8, wherein the cannula comprises two cannula wings and the at least one means for removably affixing the band to the cannula is arranged on at least one cannula wing or on both cannula wings.
System according to claim 8 or 9, wherein the cannula further comprises locking means for locking the band to the cannula once the band is removably affixed to the cannula.
System comprising an element used for hemostasis, preferably a swab, and a dual-purpose band according to one of the preceding claims, wherein the element comprises at least one means for removably affixing the band to the element, preferably comprising at least one recess or opening in the element and /or at least one protrusion on the element and /or at least one element of a press-button and /or at least one loop or hook.
System according to claim 11, wherein the element used for hemostasis further comprises locking means for locking the band to the element used for hemostasis once the band is removably affixed to the element used for hemostasis.
Cannula, configured to be used with a dual-purpose band according to one of claims 1-7, preferably comprising at least one means for removably affixing the band to the cannula.
Element used for hemostasis, preferably a swab, configured to be used with a dual-purpose band according to one of claims 1-7, preferably comprising at least one means for removably affixing the band to the element used for hemostasis.
Use of a dual-purpose band according to one of claims 1 to 7 for securing a cannula to a patient’s body and for hemostasis, in particular for securing an element used for hemostasis, preferably a swab, to the patient’s body.