WO2017081413A1

WO2017081413A1 - Device for agitating and collecting biological liquid samples suitable for sorting

Info

Publication number: WO2017081413A1
Application number: PCT/FR2016/052914
Authority: WO
Inventors: Florent Beauducel
Original assignee: Horiba Abx Sas
Priority date: 2015-11-13
Filing date: 2016-11-09
Publication date: 2017-05-18
Also published as: FR3043783B1; FR3043783A1

Abstract

The invention relates to a device for collecting biological liquid samples, which comprises a sampling member (50, 52) capable of collecting a biological liquid sample in a tube (10) received in a rack (8). The device also includes a changer (34) capable of moving a tube (10) on a rack (8) and a scheduler capable of determining destination data for a tube (10) and arranged to control the changer (34) so as to move a tube (10) held in a rack (8) vertically in accordance with destination data associated with said tube (10).

Description

Device for shaking and sampling biological fluids suitable for sorting

The invention relates to the field of taking samples of biological fluids, in particular a body fluid, for example blood.

In recent decades, blood products testing devices have become increasingly automated. In order to meet the demands of blood tests, the need for sampling capacity and multi-analysis has exploded. This is reflected in the fact that modern devices are evaluated according to their rate of analysis (number of tubes per hour), and their ability to perform several types of tests on a single machine.

The developments in the field initially favored the rate of treatment, then the addition of different types of tests. Some tasks in the sequence to be performed by the device constrain the ability to increase the rate by adding hardware resources.

Thus, it is necessary to shake the tubes for a certain time so that the sampled blood product is homogeneous at the time of sampling. Conversely, a shaken sample should not remain too long at rest before sampling, otherwise the benefits of agitation may be lost. In addition, the agitation can not be accelerated beyond a certain speed, otherwise the sample may be deteriorated and / or the resulting mixture will be unsatisfactory.

In order to increase the rate by taking these constraints into account, two-tube stirrers were provided, followed by tube supports, also called racks, in order to agitate several tubes at the same time. The racks have been designed with various layouts, up to the limits of agitation and clutter. Then, the stirrers were modified in order to be able to receive two racks simultaneously. Thus, the maintenance of the rate has been improved during the transition between two successive racks, while allowing to maintain a satisfactory stirring. Gradually, the devices were automated to the limits of the sequential treatment of the racks. However, these improvements have now reached their limits in terms of pure pace, but also in terms of exceptional case management.

Exceptional case means for example when a rack contains only one tube, or when a tube must be examined urgently, regardless of the rack already treated, or when a tube has already been subject a sample and an analysis must be re-analyzed because there is suspicion about the result of an analysis (eg measurement at the margin of a detection limit, etc.).

The situation of the "single tube" is also found when a rack contains tubes requiring analyzes not managed by the device, and a single tube on a rack can be effectively analyzed by the device.

This increase in rates is accompanied by the increasing integration of devices within the same facility. The management of the distribution of the tubes between the various devices, as well as their archiving once the desired tests have been carried out is urgently required.

To solve this problem, specialized devices, called "sorters" have been developed. These devices have the sole function of sorting tube racks to group together tubes for similar locations, such as archiving.

These devices are very bulky, pose significant design problems, represent a significant additional cost. In addition to these defects, once the installation changes size, the sorters become over-sized or undersized, thus constituting a mismatch or bottleneck. The invention improves the situation. To this end, the invention proposes a device for sampling biological fluids comprising a sampling member adapted to perform a sampling of biological fluids in a tube received on a rack, characterized in that it comprises in addition, a passer capable of moving a tube on a rack and scheduler capable of determining destination data for a tube and arranged to control the passer to vertically offset a received tube in a rack according to the destination data associated with that tube. This device is particularly advantageous because it makes it possible to quickly detect at the output the tubes which need a specific treatment. There is no need for a sorter, since an operator can do it manually and reliably.

According to various variants, the device may have one or more of the following characteristics:

the scheduler is furthermore capable of determining destination data for a rack which receives at least one tube and is arranged to control the passer to pull a rack out of the device, and to arrange it at a varying output position; destination data associated with the rack,

the scheduler is arranged to release a rack from the device having empty locations, in response to a user command or in response to exceeding a chosen duration,

the passer is able to grip a tube on a rack received in the agitator and to move it to the sampling member, and in which the scheduler is arranged to define a tube collection order independently of the order of the positioning of the tubes in the respective racks and the order of introduction of the racks into the device and to control the passer to seize the tubes according to the order of sampling,

the passer includes a gripper for grasping a tube on a rack on which it is received, and

the passer includes a sensor arranged to read information about the tubes received on a rack in the agitator, and / or on the rack itself. Other features and advantages of the invention will appear better on reading the following description, taken from examples given for illustrative and non-limiting purposes, taken from the drawings in which:

FIG. 1 represents a perspective view of a device according to the invention,

FIG. 2 represents a perspective view of part of the elements of the device of FIG. 1,

FIG. 3 represents a side view of the interior of the device of FIG. 1,

FIGS. 4 and 5 show respectively a perspective view and a side view of an agitator shown in FIGS. 2 and 3,

FIGS. 6 and 7 show a perspective view of a tube rack of FIGS. 4 and 5 respectively without and with a tube,

FIG. 8 represents a perspective view of the feeder of FIG. 2,

FIG. 9 represents an example of a function implemented by the scheduler, and

FIG. 10 represents a schematic view of an installation comprising several devices, at least one of which is according to FIG.

The drawings and the description below contain, for the most part, elements of a certain character. They can therefore not only serve to better understand the present invention, but also contribute to its definition, if any.

FIG. 1 represents a perspective view of a device 1 according to the invention. An XYZ mark makes it possible to locate the various orientations on the figures on which it is reproduced. The device 1 comprises a housing 2 of generally parallelepipedal shape, which has two recesses respectively for a loading tablet 4 and an unloading tablet 6. The tablets 4 and 6 respectively allow the introduction and extraction of tube racks 8 containing biological fluids as blood products that device 1 must sample and analyze. The racks 8 are arranged parallel to each other on the shelves 4 and 6, in the direction of their length, that is to say along the Y axis. In the example shown in FIG. 1, the racks are introduced into the machine from the right to the left on the loading table 4, that is to say that it is the leftmost rack 8 of the 4 loading tablet that will be inserted first, and the rightmost that will be inserted last. For the unloading tablet 6, the situation is the opposite: it is the rightmost rack 8 that has been ejected first, while the leftmost rack 8 is the one that has been ejected most recently. In the example described here, because of the internal arrangement of the device 1, the loading tablet 4 is located in the lower part of the device 1, while the unloading tablet 6 is located in the upper part. Alternatively, the functions of the tablets 4 and 6 could be reversed, or the tablets could have roles depending on the operating mode of the device 1, serving to load or unload the rack 8 according to the situation.

The housing 2 also has a screen 12 for controlling the device 1 and to monitor the operating state thereof. Finally, the housing 2 has a hatch 14 which allows the introduction of an "urgent tube". An urgent tube is a single tube that a user wishes to treat in priority over others. As can be seen in Figures 2 and 8, this tube is received in a barrel 15 which is part of the device 1. The hatch 14 can also be used to introduce tubes whose treatment is incompatible with the use of a rack, for example pediatric tubes.

FIG. 2 represents a perspective view of part of the elements contained inside the casing 2 of the device 1. As can be seen in this figure, the device 1 receives a wall 16 which is expressed mainly in the direction Y and is located substantially at the end of the loading tablet 4. The wall 16 has two arms 18 which allow its attachment to the housing 1, and an opening 20 which shows a charger 22. The charger 22 is attached to the wall 16 substantially at the level of the loading tablet 4, the opposite side thereof. When a rack 8 is pushed in an arrow 21 from the tablet 4, it is received directly in the charger 22. The charger 22 comprises a jack 24, adapted to move in the direction Y, which controls a finger (not shown) through the opening 20 which pushes a rack 8 received in the magazine 22 in an arrow 25 towards the inside of the device 1, as will be seen below.

The device 1 also comprises an agitator 30, an elevator 32 and a conveyor 34. The agitator 30 has the function of mixing the tube racks 8 which it receives, by rotation along an axis substantially parallel to Y. As can be seen from FIG. see in Figures 4 and 5, the agitator 30 can receive 4 racks 8, each arranged at about 90 ° from each other. Alternatively, the agitator 30 could be arranged to receive only 3 racks 8, or more than 4 racks. The stirrer 30 comprises a motor 36 which is arranged to apply a rotation for mixing the contents of the tubes 10 received on the racks 8 that it supports.

As will be seen in the following, the motor 36 can also be controlled to present a rack 8 chosen in front of the feeder 34. To receive the racks 8, the stirrer 30 comprises four supports 38 each having a guide 40 elongated in the direction Y. The supports 38 are connected to the motor 36, so that the rotation of the latter causes the rotation of the supports 38 and the racks 8 that they receive.

As can be seen in Figures 6 and 7, the rack 8 has a T-shaped base 42 which is housed in one of the guides 40 of the agitator 30. Thus, to introduce a rack 8, simply place the desired support 38 of the agitator 30 in front of the loader 22, and the jack 24 is actuated to push the rack 8 into place in the corresponding guide 40.

The agitator 30 is moved within the device 1 by the elevator 32 in an arrow 35 in FIG. 2. The elevator 32 causes the stirrer 30 to move along the Z axis between a low position in which it can receive a rack 8 of the magazine 22 and a high position in which the passer 34 can take a tube 10 on a rack 8. The elevator 32 is driven by a belt 43 and a motor 44. FIG. 8 shows a perspective view of the feeder 34, along a mirror axis with respect to the view of FIG. 2.

The feeder 34 comprises a motor 45 which drives a belt 46 which is connected to an attachment portion 47. The feeder 34 has wheels 49 which are received in a rail 48 visible in FIG. 2 mounted on the wall 16. Thus, the passer 34 moves along the Y axis as represented by the arrow 50.

The main function of the conveyor 34 is to take a tube 10 from a rack 8 received on the stirrer 30, and to feed this tube 10 to a first sampling member 51 or a second sampling member 52 (FIG. visible in Figure 3).

In order to take the tubes 10, the feeder 34 comprises a clamp 54 which is displaced along the axis X by means of an actuator 56. To identify the tube 10 to be sampled, the feeder 34 uses a sensor 58 which reads a bar code or other optical identification means carried by the tubes 10. The clamp 54 could also be replaced by another gripping member, for example a vacuum nozzle, a magnetic member, etc. The sensor 58 could also be different, and be for example an RFID sensor.

The feeder 34 finally comprises a high stop 60 and a low stop 64 which limit the displacement of the tube during the introduction and extraction of the needle for sampling, and a pusher 62. The pusher 62 allows ejecting a rack 8 from the agitator 30 to the unloading tablet 6.

To take a tube 10 of the agitator 30 to one of the sampling members 51 and 52, the elevator 32 moves the agitator 30 in the up position at the level of the conveyor 34, and the motor 36 of the agitator 30 presents the Rack 8 sought in front of the feeder 34. Next, the feeder 34 moves along the Y axis to identify the desired tube 10 by means of the sensor 58. Once the tube 10 identified, the actuator 56 moves the clamp 54 which seizes the tube 10, and the elevator 32 controls a descent of the agitator 32 according to the direction Z, so that the tube 10 is removed from the rack 8. The passer 34 is then moved in the direction Y below the first sampling member 51 or the second sampling member 52. Once the passer 34 stopped , the needle of the sampling member moves along the axis Z as represented by the arrows 65 to take the sample in the tube 10. Finally, by a series of reverse operations, the tube 10 is replaced in the rack 8 on the stirrer 30.

To extract a rack 8 from the agitator 30, the conveyor 34 is moved leftmost along the Y axis according to the view of FIGS. 2 and 3. Then, the elevator 32 moves the agitator 30 in the up position at the level of the feeder 34, and the motor 36 of the agitator 30 has the rack 8 sought in front of the feeder 34. Finally, the feeder 34 is moved to the right along the Y axis, the pusher 62 gradually pushing the rack 8 out from the support 38 which receives it, to an unloading area 66 of the unloading table 6, and a not shown actuator moves the rack 8 extracted along the X axis as represented by the arrow 67 to extract the rack 8 from the device 1.

All these actions are coordinated by a scheduler which can be realized in the form of a computer program. The scheduler has the function of coordinating the loader 22, the agitator 30, the elevator 32 and the feeder 34 as well as the sampling members 51 and 52 in order to introduce the carriers 8, to agitate them, and to make the samples.

In the example described here the scheduler is integrated within the housing of the device 1. Alternatively, the scheduler could be remote, and run from a computer or a controller located outside the housing of the device 1, and in communication with the latter wired or wireless. In addition, such a computer or controller could control a plurality of devices 1 to which it would be connected, independently of each other. When a rack 8 is loaded into the stirrer 30, it is moved by the elevator 32 at the level of the feeder 34, which uses the sensor 58 to determine the tubes 10 which are present on the rack 8, as well as the analyzes which are required for these tubes. Thus, the scheduler knows exactly which tubes are present on the racks 8, and can define a sampling and analysis sequence to optimize the rate of the device 1.

Indeed, if an urgent tube is introduced through the hatch 14, the scheduler can "pause" the current sequence, and prepare the collection of the urgent tube as soon as the current tube is removed and the latter has been put back in his rack.

Figure 9 shows an example function implemented by the scheduler. This figure represents an operating loop of the scheduler, which starts with an operation 900 in which an Ev () function tests the presence of an analysis launch event.

When such an event is detected, a function PopR () is executed in an operation 905. The function PopR () receives as argument a list Rk. The list Rk contains the identifiers of the tube racks 8 currently received by the device 1. In the example described here, the racks 8 are arranged in order of priority in the list Rk, so that the first rack 8 is the one that must be treated in priority etc. The management of the list Rk and the introduction of the racks 8 into it can be managed by the scheduler or be automated. In the example described here, the racks 8 received on the loading tablet 4 are classified in order of proximity to the input of the device 1, whereas when an urgent rack or an urgent tube is introduced, it is placed at the top from the list Rk. Other methods of managing the list Rk may be used. The function PopR () unpacks the list Rk and the resulting rack identifier 8 is stored in a variable R. Then, in an operation 910, an Intro () function is executed. The function Intro () receives the variable R as argument and returns a list Tub and a variable L.

In the example described here, the Intro () function controls the device 1 to introduce the carrier 8 whose identifier is given by the variable R, as well as to mix the tubes 10 that it carries. In the example described here, this introduction comprises the reading of labels carried by the tubes 10 making it possible to determine the identifiers of the tubes 10 concerned, as well as the analyzes which are required. The identifiers of the tubes 10 are stored in the Tub list for their subsequent analysis. The reading of the tubes 10 also makes it possible to determine the time required for the analyzes to be carried out for the rack 8 designated by the variable R, and this duration is added to the variable L, which receives the estimated duration to analyze all the tubes loaded into the device. 1.

The Intro () function may modify the Tub list depending on the processing evolution since the previous Intro () function was run, based on one or more of the following criteria:

- the type of tests to be carried out on newly introduced tubes,

- the emergency status of one or more of the newly introduced tubes,

the degree of agitation of the tubes in the device,

the origin of the rack of the newly introduced tubes (tablet, emergency tube, etc.), the time of presence of each tube present in the device.

Other criteria may be taken into account depending on circumstances.

Then, in an operation 915, a test compares the variable L to a threshold LT. The threshold LT corresponds to the estimated duration for agitating the tubes of a rack 8. In fact, if the total duration of the remaining analyzes is less than this duration (of the order of two minutes in the example described here), it It is desirable to load a new rack so to agitate it as quickly as possible and to ensure operation at maximum rate of the device 1.

If L is less than LT, then operation 910 is repeated. Otherwise, the analysis of a tube is tested. For this, in an operation 920, a test determines whether the list Tub is empty by means of a function PopT () which receives the list Tub as argument.

If the Tub list is not empty, then the PopT () function determines which one of the tubes should be the next to be tested. For example, in the case of an urgent rack or an urgent tube introduced in operation 910, the Tub list can receive the identifiers of these tubes in a location such that these will be processed first as soon as their agitation will be finished. In this case, the list Tub is simply depilated, and the identifier of the corresponding tube is returned in a variable T. In other embodiments, the function PopT () can be more complex, and decide according to of intrinsic and / or extrinsic algorithms the next tube to be analyzed.

Then, in an operation 925, a function Shk () determines whether the tube designated by the variable T has been sufficiently agitated. If this is not the case, then additional agitation is performed.

The tube designated by the variable T is then analyzed in an operation 930 by a function Proc (). The function Proc () commands the device 1 to pick up the identification tube T on its rack, to bring it to one of the two sampling members 51 and 52, and to replace it in its rack. times the analysis done. To fetch the identification tube T, the device 1 can control the reading of the labels of the tubes on the rack considered, or use an intermediate table associating each received tube in the device 1 at a given location on one side of the agitator 30. In the example described here, the sampling member 51 is dedicated to direct analyzes, while the sampling member 52 is dedicated to test repetitions. The Proc () function also updates the Tub list, either by removing the T identifier or by replacing it if a test repetition is necessary. The variable L is also updated accordingly, subtracting from this the duration of the analysis that was planned for the identifier tube T.

Finally in an operation 935, an Emp () function determines whether the Tub list is empty. If this is not the case, then the loop resumes with operation 915 to determine if a new rack must be loaded. Otherwise, in an operation 940 an operation identical to the operation 910 is performed. If there is no more rack, then all the analyzes were carried out, and the device 1 resumes with the waiting of a next event in the operation 900. Otherwise, the loop resumes with the operation 910 for introduce this rack.

When the agitator 30 has four rack receiving stands, one of them may be left empty at all times to serve as a buffer which is used to temporarily store a tube as needed.

The fact that the agitator 30 can receive at least three racks 8 ensures an optimal rate in case of need for test repetition (also called Rerun / Reflex). Thus, even if the three racks contain only a "useful" tube, the continuity of the rate is ensured.

Indeed, before being sampled, the tubes must be stirred sufficiently to ensure homogeneity of the mixture in each tube. This means that when a rack is introduced into the device, the tubes must first be shaken. However, this operation requires the equivalent of 4 sampling operations. Therefore, when two racks can be received, some continuity of pace can be ensured by starting to shake the tubes of the second rack while the last tubes of the first rack are sampled.

However, in the case of an urgent tube or a Rerun / Reflex type operation, the rate is likely to fall, the time to properly shake these tubes. The Third rack allows to continue to treat one or two racks, while agitating the urgent tube or the tube of operation type Rerun / Reflex. Thus, the latter are processed as quickly as possible, while maintaining a maximum operating rate for the device.

When the agitator 30 receives 4 or more supports, new possibilities open, such as the use of a buffer carrier described above, or the possibility of leaving a support empty at all times, in order to allow the use of "Urgent rack", ie no longer a tube, but an entire rack of tubes that will be collected and analyzed in priority.

Finally, the device 1 can also receive a second stirrer similar to the agitator 30. This allows the use of additional buffers, and the elevator 32 and the passer 34 will allow the transfer of a rack to another, on the same agitator or between the two agitators.

Thanks to the new paradigm proposed by the invention, it becomes possible to maintain a real rate of 120 samples per hour, even using urgent tubes or having racks with a single useful tube. Beyond the real improved rate, the design of the device according to the invention opens a new field of analysis processing, since it becomes possible to determine the fastest sampling path, regardless of the composition of the racks and their order of introduction into the device 1. Depending on the sizing chosen for the components of the device, the rate could be increased, for example to 240 samples per hour or more.

In the context of the invention, the Applicant has pushed the mechanical and functional analysis of the elements of the device to smooth the operation as possible. This led the Applicant to define action cycles of 15 seconds, and to define the following actions:

loading a rack from the front shelf and identifying this rack and the tubes it receives,

- agitation,

verification of the identifier of a tube, gripping of this tube, provision of sampling and replacement of this tube,

- ejection of a rack to the front shelf. Actions a. to d. allow the simple management of interactions within a device not connected to a conveyor and not suitable for sorting tubes and / or racks. The scheduler is arranged to manage these actions in an order to optimize the operating rate of the device. The Applicant has also discovered that these actions could be extended to automate the connection of the device to a conveyor (referenced 1000 in FIG. 10) making it possible to send them to another stirring and sampling device (referenced 1100 in FIG. 10). which can be in accordance with the device 1 according to the invention or differ from it, as well as to automate the sorting of the tubes 10 and / or the rack 8 of tubes 10, for automated or manual subsequent processing.

In this case, new actions can be defined for the management by the scheduler:

e. loading a rack from the conveyor and identifying this rack, f. verification of the identifier of a tube, gripping of this tube, provision of sampling and then repositioning of this tube, and simultaneous loading of a rack from the waiting area of the conveyor,

boy Wut. verification of the identifier of a tube, gripping of this tube, provision of sampling and then repositioning of this tube, and simultaneous ejection of a rack towards the waiting zone of the conveyor,

h. stirring and identification of a rack,

i. ejection of a rack towards the conveyor, j. ejecting a rack with offset on the front shelf, k. vertical offset of one or more tubes of a rack and ejection of this rack on the front shelf with or without offset of the rack,

1. verification of the identification of a tube, gripping of this tube, provision of sampling and replacement of this tube at a location other than the original one (rack and / or position on the rack),

m. verification of the identifier of a tube, gripping of this tube, provision of sampling and then repositioning of this tube at a location other than the original one (rack and / or position on the rack), and simultaneous loading of a rack (from the waiting area of the conveyor or from another location),

not. verification of the identifier of a tube, gripping of this tube, providing sampling and then replacing the tube at a location other than the original one (rack and position on the rack), and simultaneous ejection of a rack (to the conveyor waiting area or to another location), and o. verification of the identifier of a tube, gripping of this tube, and replacement of this tube at a location other than the original one (rack and position on the rack).

Actions e. have. make it possible to manage the connection of the device of the invention to a more complex installation in an analysis laboratory. In this case, the device is capable of receiving tubes 10 and / or racks 8 of other devices 1100 within the installation. This transmission is carried out by a conveyor 1000 which brings the tubes 10 and / or the racks 8 to a dedicated waiting zone of the device 1.

Actions j. and k. allow to manage the tubes and / or racks for manual sorting output. Indeed, an operator seeing the output of a vertically offset tube and / or offset rack will know that they must be treated separately, whether this is a complementary analysis or a re-analysis. Of course the dimensions of the device (length of the tablet, outlet height of the rack) must be adapted accordingly. Actions a. at k. do not require any adaptation of the logic of the device described above. The introduction of a rack (Intro function () of FIG. 9), the treatment of a tube (Proc function (FIG. 9)) and / or a rack (Empt () function of FIG. 9). ) are adapted to introduce one or more of the actions a. at k. as required.

Actions 1. to o. allow for their part to perform a fully automated sorting tubes and / or racks. Indeed, by allowing to place a tube in a location separate from its original location, it becomes possible to rearrange the tubes on the different racks to take into account the remaining tests to be performed.

This has several advantages. The sorting devices, whether dedicated to archiving or to the circulation of the tubes between several devices of the same installation are extremely expensive, occupy a lot of space, and need to be dimensioned precisely with respect to installation.

In addition, if the installation changes size (addition of other devices, or size reduction), the sorting device becomes unsuitable, or even needs to be replaced. With the invention, the device dedicated to sorting is simply deleted because the sorting is internalized. This means less costs, less space, less design time (sizing), and more scalability (regardless of the size of the installation, sorting is integrated).

Finally, as the sorting is integrated, a considerable saving of time can be achieved in the filling of the racks. Indeed, it is no longer necessary to prepare racks grouping tubes with similar analyzes to achieve to pre-sort the tubes. Users can put the tubes in bulk in the racks regardless of the analyzes, and the device will optimize the distribution of the tubes in the racks.

This type of automated processing is made possible by two features. The first feature is the ability of the agitator to shake at least three racks simultaneously, which allows one of the three racks to be permanently used as an adjustment destination. Thus, as soon as it is determined that a tube must be analyzed differently from the tubes of its original rack after the current analysis, it is placed after analysis on the adjustment rack. As soon as another tube is determined to be subjected to the same analysis, it is also placed back on this rack, and so on until the adjustment rack is filled or a time threshold is exceeded, after which the adjustment rack is removed from the device, to the conveyor if there is one, or offset on the tablet to indicate to the user the destination of this rack.

During the conventional operation of the device, the total number of "empty" locations on the racks received (ie the number of locations not receiving tubes), is constant, since the tubes that are moved on another rack or location other than their original location leave it empty. This remains the case as the adjustment racks are ejected as soon as they are full and they are replaced by another rack full input.

When the adjustment rack is extracted at the request of the user or after exceeding a time threshold, an empty rack must then be introduced into the device to allow recovery of the adjustment capacity. In general, each additional rack managed by the agitator makes it possible to manage a different adjustment destination. Four racks will therefore manage two adjustment destinations, and the addition of a second agitator will increase the number of adjustment destinations. The second characteristic is a change in the management of the device logic. Indeed, in the case described with reference to the actions a. at k., the device is totally independent of the rest of the chain, since a rack will stand out as it is returned, even if the tubes it contains will not necessarily be treated in their order in the rack or if another rack will be treated in priority. In other words, the device constitutes a closed universe uninfluenced by the other devices, even when connected to a conveyor.

In the case of actions 1. to o., The device is a link in a chain formed by the installation. As such, the management by the device is influenced by the general condition of the installation. Thus, when a rack is introduced into the device, the latter reads the information relating to each of the tubes of this rack, draws for each a destination data, and updates the list of actions to be performed for each tube. The destination data indicates the next device to which a tube is to be transported once processed, or archiving if there is no further analysis. In the example described here, the destination data is determined from the identifier of the tube by accessing a local or remote database. Alternatively, it can be part of the information read on the tube.

Then, when the time comes to perform the analysis of a given tube, that is to say at the moment when the device controls the clamp to go grab the tube on the rack, a new reading of the information relating to the tube is made to determine if the data destination of the latter after the current analysis is identical to that of the rack that receives it. If it is, then it is the action c, f, or g. which is executed according to what is planned to optimize the pace. Otherwise, it's action 1., m. or n that is executed.

Initially, no rack has destination data. It is during the sampling of the first tube that it receives that it can be assigned a destination data. In fact, according to the invention, when no rack has data of destination identical to that of a tube, the oldest rack is given this data destination.

Alternatively, the racks could be assigned a destination data according to the destination data of the tubes they receive as well as the data of destination of the other racks already loaded when loading the rack into the device.

Thus, as the tubes are processed, the arrangement of the tubes and their distribution on the racks loaded in the device are modified. For example, when a tube has been replaced in a rack different from its original rack, the next tube of the original rack, if it is returned to the original rack, will not be returned to its original rack. origin but at the location left empty by the previous tube. Similarly, when a tube of a given rack must not be analyzed but its destination data is different from that of the rack that receives it, a specific displacement of the tube by the clamp may be performed (action o.). This is also the case if a tube received on a rack already loaded in the device has its analysis modified and no longer correspond to the analysis or analyzes for which the device is intended.

Among the actions described above, the action o. is the only one likely to impact the pace insofar as it does not foresee any analysis. However, this type of situation should be very rare in practice, and can not be avoided.

It therefore appears that, if the device operates according to the same principles as those described above, and provides similar benefits, its logic is different because external events are likely to impact its operation.

For example, the user may decide to add an additional test not originally intended for a tube already in the installation. In this case, this tube will most likely be moved to an adjustment destination rack during one of its treatments. In addition, all subsequent tubes will also be moved to a location separate from their original location. Despite this, thanks to the device of the invention, the rate will remain maximum. Examples given for the implementation of operations 1. to o. have been described with reference to an installation comprising several devices connected by a conveyor. However, they are fully combinable with operations j. and k. in the absence of a conveyor. Indeed, the rack having selected destination data may be shifted on the tablet 4 or 6 according to a characteristic distance of the destination concerned. In addition, the corresponding destination information can be displayed nearby for each rack.

In the above, the duration of operations was set at 15 seconds, which offers a good compromise between granularity of operations and scheduling efficiency, especially with a view to the desired rate of 120 samples per hour. Alternatively, other action times may be selected, depending on the compromises and rates sought. In general, each time a rack that had been introduced empty in the device was "forced" out of the device, that is to say at the request of the user, or following the passing of a threshold of time, whether towards a conveyor or a tablet, it must be replaced. This replacement can be manual or automated (for example via the conveyor).

The device that has been described above is intended to perform a number of analyzes after sampling the tubes. Alternatively, the device could be limited to only sampling, and the analyzer be deported. In addition, this device provides a shaking of the tubes which is optional. In other words, the invention relates to any device for taking samples of biological fluids adapted to determine destination data of a tube and move it on the rack that receives it based on these data. In the context of the invention, the destination data designates the destination of the tube after the sampling operation. This destination can be archiving, another device, a re-test, an alternative test, etc. The vertical offset of the tube allows to visually determine one or more of these destinations in an extremely fast manner, which simplifies the task of the operator.

The device that has been described above is intended to perform the displacement of the tubes as one of several steps managed by scheduler. However, the scheduler may be provided to process other actions or to process only one or more actions relating to the movement of the tubes or racks (i.e. actions j and k). In addition, the term displacement must be understood as covering any manner of moving the tube in the rack:

- by grasping it physically like a plier,

- by pushing it with a mechanical finger through an opening of the rack provided under the receiving location of the tube, or

- any other way of interacting with the tube to move it when it is received on the rack.

The foregoing description has been made with reference to blood products, however the invention finds application in the treatment of all types of biological fluids and in particular body fluids.

Claims

claims

Biological fluid sampling device comprising a sampling member (50, 52) capable of taking a sample of biological fluids in a tube (10) received on a rack (8), characterized in that it further comprises a feeder (34) capable of moving a tube (10) on a rack (8) and scheduler able to determine destination data for a tube (10) and arranged to control the passer (34) to shift vertically a tube (10) received in a rack (8) according to the destination data associated with this tube (10).

An apparatus according to claim 1, wherein the scheduler is further capable of determining destination data for a rack (8) which receives at least one tube (10) and is arranged to control the passer (34) to output a rack (8) of the device (1), and to arrange it in an output position varying according to the destination data associated with the rack (8).

Device according to one of the preceding claims, wherein the scheduler is arranged to output a rack (8) of the device (1) having empty locations, in response to a user command or in response to exceeding a chosen duration .

Device according to one of the preceding claims, wherein the passer (34) is capable of grasping a tube (10) on a rack (8) received in the stirrer (30) and moving it to the body sampling (50, 52), and wherein the scheduler is arranged to define a picking order of the tubes (10) regardless of the order of the positioning of the tubes (10) in the respective rack (8) and the order of introduction of the racks (8) in the device (1) and to control the passer (34) for gripping the tubes (10) in the order of sampling. Device according to one of the preceding claims, wherein the passer (34) comprises a clamp (54) for gripping a tube (10) on a rack (8) on which it is received.

Device according to one of the preceding claims, wherein the feeder (34) comprises a sensor (58) arranged to read information about the tubes (10) received on a rack (8) in the stirrer (30), and / or on the rack (8) itself.