ClassID:

12884

A61B5/15003 - page 4 - CPC Classification

Classification description:

Measuring for diagnostic purposes ; Identification of persons; Devices for taking samples of blood; Details; Source of blood for venous or arterial blood

Recent Application in this class:
#901
20100030137
2010-02-04

APPARATUS AND METHODS FOR ANALYZING BODY FLUID SAMPLES

#902
20100025342
2010-02-04

Platelet-rich plasma separator and platelet-rich plasma separation method

#903
20100020309
2010-01-28

BLOOD MONITORING SYSTEM

#904
20100016809
2010-01-21

Device and method for monitoring a vascular access, and device for creating a vascular access

#905
20100011888
2010-01-21

Method and device to extract components contained in a fluid

#906
20100010372
2010-01-14

POROUS MULTIPLE SAMPLE SLEEVE AND BLOOD DRAWING DEVICE FOR FLASH DETECTION

#907
20090326343
2009-12-31

Fluid handling cassette having a spectroscopic sample cell

#908
20090318891
2009-12-24

Delivery device, system, and method for delivering substances into blood vessels

#909
20090308184
2009-12-17

Co-molded pierceable stopper and method for making the same

#910
20090299223
2009-12-03

Blood component collection apparatus and method

#911
20090299155
2009-12-03

CONTINUOUS CARDIAC MARKER SENSOR SYSTEM

#912
20090285722
2009-11-19

Collection container assembly with nanocomposite barrier coating

#913
20090281506
2009-11-12

Needle protector, needle assembly and fluid processing set including the same

#914
20090281460
2009-11-12

Automated point-of-care fluid testing device and method of using the same

#915
20090270762
2009-10-29

MEDICAL ADAPTER AND CHEMICAL REACTION CARTRIDGE

#916
20090266182
2009-10-29

METHOD AND INSPECTING DEVICE FOR IDENTIFYING TEST SPECIMEN AND MULTIFUNCTIONAL TEST SPECIMEN

#917
20090264724
2009-10-22

SERUM SAMPLING APPARATUS AND CATHETER

#918
20090264720
2009-10-22

Wearable Automated Blood Sampling and Monitoring System

#919
20090259201
2009-10-15

Flash activated passive shielding needle assembly

#920
20090227953
2009-09-10

Flashback blood collection needle

#921
20090227951
2009-09-10

Assemblies for identifying a power injectable access port

#922
20090227896
2009-09-10

Flashback blood collection needle

#923
20090227894
2009-09-10

Hand-held aspiration syringe and methods

#924
20090216216
2009-08-27

Methods of performing a power injection procedure including identifying features of a subcutaneously implanted access port for delivery of contrast media

#925
20090216154
2009-08-27

Automatically retractable safety blood sampler

#926
20090209933
2009-08-20

WHOLE BLOOD COLLECTION KIT AND METHOD

#927
20090204074
2009-08-13

Methods of power injecting a fluid through an access port

#928
20090204026
2009-08-13

Safety blood collection assembly with indicator

#929
20090198196
2009-08-06

Phlebotomy needle assembly and frangible cover

#930
20090198181
2009-08-06

Intravenous needle insertion or cannulation

#931
20090192367
2009-07-30

ANALYTE DETECTION SYSTEM WITH PERIODIC SAMPLE DRAW AND BODY FLUID ANALYZER

#932
20090187153
2009-07-23

WINGED NEEDLE ASSEMBLY AND FRANGIBLE COVER

#933
20090187083
2009-07-23

Catheter

#934
20090186065
2009-07-23

Isolating and purifying cells for therapy

#935
20090178459
2009-07-16

Analyte sensor

#936
20090177167
2009-07-09

Needle tip guard for percutaneous entry needles

#937
20090157430
2009-06-18

SYNCHRONIZATION AND CONFIGURATION OF PATIENT MONITORING DEVICES

#938
20090156975
2009-06-18

Robust System and Methods for Blood Access

#939
20090156963
2009-06-18

Blood Collection Device with Tube Retaining Structure

#940
20090156922
2009-06-18

BLOOD MONITORING SYSTEM

#941
20090156916
2009-06-18

CATHETER SYSTEMS WITH BLOOD MEASUREMENT DEVICE AND METHODS

#942
20090156911
2009-06-18

LOW DRAW VOLUME ANALYTE DETECTION SYSTEMS

#943
20090149812
2009-06-11

NEEDLE GUIDANCE APPARATUS

#944
20090149771
2009-06-11

Vessel locator

#945
20090149728
2009-06-11

Blood contacting sensor

#946
20090143770
2009-06-04

Medical luer fitting that promotes liquid mixing

#947
20090143711
2009-06-04

Anti-clotting apparatus and methods for fluid handling system

#948
20090137906
2009-05-28

Ultrasonic Piercing Needle

#949
20090131861
2009-05-21

Fluid component analysis system and method for glucose monitoring and control

#950
20090118670
2009-05-07

Cannula inserting system

#951
20090117646
2009-05-07

Device, kit and method for pulsing biological samples with an agent and stabilising the sample so pulsed

#952
20090105658
2009-04-23

Infusion sets for the delivery of a therapeutic substance to a patient

#953
20090099528
2009-04-16

Protector and needle set

#954
20090099431
2009-04-16

Bodily fluid sampling systems, methods, and devices

#955
20090088698
2009-04-02

Blood collection needle assembly

#956
20090088617
2009-04-02

Phlebotomy needle with shape memory alloy flashback sensor

#957
20090082647
2009-03-26

Detecting access disconnect using needle sleeve

#958
20090076414
2009-03-19

Closed specimen collection system

#959
20090069743
2009-03-12

INFUSION THERAPY SENSOR SYSTEM

#960
20090048576
2009-02-19

Managing Cross-contamination in Blood Samples Withdrawn from a Multilumen Catheter

#961
20090048535
2009-02-19

Detecting Cross-contamination in Blood Measurements with a Multilumen Catheter

#962
20090043240
2009-02-12

Method and apparatus for blood transport using a pressure controller in measurement of blood characteristics

#963
20090043225
2009-02-12

FLASHBACK BLOOD COLLECTION NEEDLE

#964
20090043171
2009-02-12

Systems and methods for determining physiological parameters using measured analyte values

#965
20090036841
2009-02-05

COATINGS FOR BLOOD AND BONE MARROW-CONTACTING DEVICES

#966
20090036764
2009-02-05

Fluid injection and safety system

#967
20090030401
2009-01-29

Self-sealing male luer connector with biased valve plug

#968
20090030343
2009-01-29

Process for the production of interchangeable vacuum test tube holders for taking blood samples and product obtained therefrom

#969
20090024092
2009-01-22

SAFETY SHIELD ASSEMBLY

#970
20090024057
2009-01-22

Catheter

#971
20090004628
2009-01-01

Tissue desensitizing system and method

#972
20090004060
2009-01-01

Micro-chemical analysis device, microchemical measuring method, and sample collecting tool

#973
20080319346
2008-12-25

Safety blood collection assembly with indicator

#974
20080319345
2008-12-25

Blood collection assembly

#975
20080312576
2008-12-18

PLUNGER-LESS SYRINGE FOR CONTROLLING BLOOD FLOW

#976
20080306424
2008-12-11

Flow-through fluid reservoir

#977
20080302932
2008-12-11

Mounting Clip for Fluid Reservoir

#978
20080281227
2008-11-13

Blood-collection device for newborn babies and infants

#979
20080281210
2008-11-13

Arterial pressure sensing device

#980
20080275396
2008-11-06

Cannula Inserting System

#981
20080275364
2008-11-06

FLASHBACK BLOOD COLLECTION NEEDLE

#982
20080275324
2008-11-06

Fluid access interface

#983
20080262421
2008-10-23

Retractable fluid collection device

#984
20080262385
2008-10-23

Backflow Preventing Structure of a Blood Sampler, Luer Adapter, Blood Sampling Needle and Blood Sampling Holder

#985
20080255500
2008-10-16

Method for drug delivery to animals

#986
20080255473
2008-10-16

SYSTEMS, METHODS, AND DEVICES FOR SAMPLING BODILY FLUID

#987
20080242975
2008-10-02

DEVICE AND METHOD FOR LOCATING A CANNULA THAT IS INSERTED INTO A BODY

#988
20080241966
2008-10-02

Apparatuses and methods for detecting an analyte

#989
20080241001
2008-10-02

Protease inhibitor sample collection system

#990
20080240990
2008-10-02

Adaptor for sample vial

#991
20080200837
2008-08-21

DISPOSABLE, CLOSED BLOOD SAMPLING SYSTEM FOR USE IN MEDICAL CONDUIT LINE

#992
20080195043
2008-08-14

Cannula Inserting System

#993
20080194986
2008-08-14

BLOOD COLLECTION SET WITH VENTING MECHANISM

#994
20080194930
2008-08-14

INFRARED-VISIBLE NEEDLE

#995
20080177202
2008-07-24

Blood drawing device with flash detection

#996
20080172025
2008-07-17

CHEMICAL REACTION CARTRIDGE AND USING METHOD THEREOF

#997
20080167577
2008-07-10

Vented phlebotomy needle with flashback chamber

#998
20080161760
2008-07-03

Medical Device Containing a Vacuum Chamber

#999
20080161723
2008-07-03

INFUSION FLOW INTERRUPTION METHOD AND APPARATUS

#1000
20080160566
2008-07-03

Method, device and system for volumetric enumeration of white blood cells

#1001
20080146915
2008-06-19

SYSTEMS AND METHODS FOR VISUALIZING A CANNULA TRAJECTORY

#1002
20080145933
2008-06-19

Systems and methods for parenterally procuring bodily-fluid samples with reduced contamination

#1003
20080132875
2008-06-05

Device and method for irreversible closure of fluid communication in a container system

#1004
20080125673
2008-05-29

Sample container with physical fill-line indicator

#1005
20080108944
2008-05-08

Catheter assembly and components thereof

#1006
20080097288
2008-04-24

Disposable blood glucose sensor with internal pump

#1007
20080097243
2008-04-24

HOLLOW NEEDLE ASSEMBLY

#1008
20080097242
2008-04-24

Disposable blood sampling device

#1009
20080091134
2008-04-17

Bag system with device for associating sampling receptacles

#1010
20080086085
2008-04-10

Blood drawing device with flash detection

#1011
20080077074
2008-03-27

Method of analyzing the composition of bodily fluids

#1012
20080072663
2008-03-27

ACCURATE AND TIMELY BODY FLUID ANALYSIS

#1013
20080064985
2008-03-13

Self flushing luer activated blood sampling devices

#1014
20080058755
2008-03-06

Method and Apparatus for Sterilely Acquiring and Separating a Fluid

#1015
20080045862
2008-02-21

SYSTEMS, METHODS, AND DEVICES FOR SAMPLING BODILY FLUID

#1016
20080045818
2008-02-21

Enhanced laser vein contrast enhancer with projection of analyzed vein data

#1017
20080038813
2008-02-14

SAMPLE VESSELS

#1018
20080033464
2008-02-07

Blood-drawing device, in particular for infants and small children or small animals

#1019
20080021294
2008-01-24

Disposable blood glucose sensor with internal pump

#1020
20080015470
2008-01-17

Sample tube for receiving body fluids, particularly blood

#1021
20080014601
2008-01-17

CONTROLLER FOR A BLOOD PARAMETER TESTING SYSTEM AND METHOD OF TESTING THEREFOR

#1022
20080009806
2008-01-10

Blood sampling device

#1023
20070284298
2007-12-13

Plasma extraction apparatus

#1024
20070282275
2007-12-06

Safety shield apparatus and mounting structure for use with medical needle devices

#1025
20070276323
2007-11-29

Device and method for controlled expression of gases from medical fluids delivery systems

#1026
20070269887
2007-11-22

Stem and progenitor cell compositions recovered from bone marrow or cord blood; system and method for preparation thereof

#1027
20070265615
2007-11-15

Electrosurgical instrument with suction, irrigation and means to collect blood

#1028
20070265573
2007-11-15

Hand-held aspiration syringe and methods

#1029
20070265549
2007-11-15

Blood collection device

#1030
20070260193
2007-11-08

Gravity-drop safety holder

#1031
20070244382
2007-10-18

Blood Analyte Determinations

#1032
20070244381
2007-10-18

Blood Analyte Determinations

#1033
20070240497
2007-10-18

Blood Analyte Determinations

#1034
20070232995
2007-10-04

HOLLOW NEEDLE ASSEMBLY

#1035
20070225675
2007-09-27

Blood Analyte Determinations

#1036
20070219509
2007-09-20

Blood collecting needle, syringe needle, winged needle, test kit and blood collecting kit

#1037
20070197973
2007-08-23

APPARATUS AND METHOD FOR DRAWING SAMPLES OF BLOOD

#1038
20070191787
2007-08-16

Medical treatment control system

#1039
20070191735
2007-08-16

System and method for automatic taking of fluid samples

#1040
20070191716
2007-08-16

Blood monitoring system

#1041
20070185413
2007-08-09

Guide wire assembly

#1042
20070179436
2007-08-02

Analyte detection system with periodic sample draw and laboratory-grade analyzer

#1043
20070179435
2007-08-02

Analyte detection system with periodic sample draw and body fluid analyzer

#1044
20070179407
2007-08-02

Closed blood sampling system with isolated pressure monitoring

#1045
20070170073
2007-07-26

Method and system for detecting age, hydration, and functional states of sensors using electrochemical impedance spectroscopy

#1046
20070167914
2007-07-19

Flashback blood collection needle with needle shield

#1047
20070149944
2007-06-28

Blood collecting needle

#1048
20070149896
2007-06-28

Medical holder

#1049
20070148782
2007-06-28

Calibration procedure for investigating biological systems

#1050
20070129683
2007-06-07

Fluid detection needle assembly

#1051
20070129618
2007-06-07

Blood parameter testing system

#1052
20070123822
2007-05-31

Safety syringe for taking blood

#1053
20070123821
2007-05-31

Safety syringe for taking blood

#1054
20070112309
2007-05-17

Withdrawal syringe

#1055
20070106220
2007-05-10

Blood drawing device with flash detection

#1056
20070104616
2007-05-10

FLUID HANDLING CASSETTE SYSTEM FOR BODY FLUID ANALYZER

#1057
20070103678
2007-05-10

Analyte detection system with interferent identification and correction

#1058
20070088229
2007-04-19

Needle assembly for a blood sampling device

#1059
20070083166
2007-04-12

Fluid Collection Device with Retractable Needle and Safety Sampling Access Needle Adapter

#1060
20070083165
2007-04-12

Bodily fluid sampling or transfusion device with protection means

#1061
20070083160
2007-04-12

System and method for assessing measurements made by a body fluid analyzing device

#1062
20070083143
2007-04-12

Anti-clotting apparatus and methods for fluid handling system

#1063
20070083091
2007-04-12

Analyte detection system with reduced sample volume

#1064
20070083090
2007-04-12

System and method for determining a treatment dose for a patient

#1065
20070082342
2007-04-12

Near-patient module for analyte detection system

#1066
20070081626
2007-04-12

Method and apparatus for enhancing accuracy of an analyte detection system

#1067
20070073237
2007-03-29

Cannula/catheter introducer

#1068
20070073160
2007-03-29

Light-guided transluminal catheter

#1069
20070066960
2007-03-22

Needle retraction structure

#1070
20070065825
2007-03-22

Device, kit and method for pulsing biological samples with an agent and stabilising the sample so pulsed

#1071
20070060872
2007-03-15

Apparatus and methods for analyzing body fluid samples

#1072
20070060840
2007-03-15

Medical device with needle safety shielding

#1073
20070027429
2007-02-01

Method and apparatus for indicating or covering a percutaneous puncture site

#1074
20070016102
2007-01-18

Method for improved accuracy of blood testing

#1075
20060293576
2006-12-28

Protrudent analyte sensor

#1076
20060287628
2006-12-21

Blood component collection apparatus and method

#1077
20060282060
2006-12-14

Blood collecting device and method of fixing it

#1078
20060282045
2006-12-14

Prepackaged medical device and packaging tray

#1079
20060282044
2006-12-14

Hypodermic syringe needle assembly

#1080
20060270997
2006-11-30

Permission-based material dispenser

#1081
20060270947
2006-11-30

Safety needle assembly

#1082
20060264898
2006-11-23

Infusion apparatuses and related methods

#1083
20060264778
2006-11-23

Verification method and system for medical treatment

#1084
20060258957
2006-11-16

Blood drawing system

#1085
20060254962
2006-11-16

Diagnostic whole blood and plasma apparatus

#1086
20060235348
2006-10-19

Method of extracting and analyzing the composition of bodily fluids

#1087
20060229531
2006-10-12

Blood monitoring system

#1088
20060228259
2006-10-12

Joint-diagnostic spectroscopic and biosensor meter

#1089
20060224125
2006-10-05

Multiport syringe

#1090
20060216209
2006-09-28

Analyte detection system with distributed sensing

#1091
20060212020
2006-09-21

Sample collection system with caspase inhibitor

#1092
20060210428
2006-09-21

Enumeration of white blood cells

#1093
20060200195
2006-09-07

Aspiration and delivery safety system

#1094
20060200078
2006-09-07

Medical assembly, in addition to a guard device, puncture element and a manipulation device for said assembly

#1095
20060200071
2006-09-07

Method and apparatus for detection of multiple analytes

#1096
20060200070
2006-09-07

Method and apparatus for calibrating an analyte detection system with a calibration sample

#1097
20060195062
2006-08-31

Apparatus for locking concentric components in alignment

#1098
20060195058
2006-08-31

Methods and apparatus for extracting and analyzing a bodily fluid

#1099
20060195046
2006-08-31

Analyte detection system with reduced sample volume

#1100
20060195045
2006-08-31

Fluid handling cassette having a fluid transport network

#1101
20060194325
2006-08-31

Fluid handling cassette with a fluid control interface

#1102
20060192164
2006-08-31

Valved fluid connector

#1103
20060189942
2006-08-24

Skin puncture device with needle stick protection

#1104
20060189934
2006-08-24

Needle tip guard for percutaneous entry needles

#1105
20060189926
2006-08-24

Apparatus and methods for analyzing body fluid samples

#1106
20060189925
2006-08-24

Methods and apparatus for extracting and analyzing a component of a bodily fluid

#1107
20060189858
2006-08-24

Analyte detection system for multiple analytes

#1108
20060188407
2006-08-24

Fluid handling cassette having a spectroscopic sample cell

#1109
20060175280
2006-08-10

Hermetically sealed container and vacuum test substance-collecting container

#1110
20060173378
2006-08-03

Automatic blood sampling device

#1111
20060173351
2006-08-03

System and method for inserting a needle into a blood vessel

#1112
20060171915
2006-08-03

Blood coagulation promoter and blood collection tube comprising a polyoxyalkylene glycerin derivative

#1113
20060155213
2006-07-13

Self flushing luer activated blood sampling devices

#1114
20060155212
2006-07-13

Self flushing luer activated blood sampling devices

#1115
20060149213
2006-07-06

Self-sealing male connector device with collapsible body

#1116
20060149211
2006-07-06

Controlled flow apparatus for medical accessories

#1117
20060129106
2006-06-15

Safety shield for medical needles

#1118
20060129064
2006-06-15

Blood collection set with an expanded internal volume

#1119
20060116660
2006-06-01

Medical hub having transparent observation section

#1120
20060111687
2006-05-25

Container for receiving a blood sample

#1121
20060111667
2006-05-25

Device and method for controlled expression of gases from medical fluids delivery systems

#1122
20060111658
2006-05-25

Sampling tube holder for blood sampling system

#1123
20060102091
2006-05-18

Portable sampling or testing device and method for pharmacokinetics and physiology studies

#1124
20060079809
2006-04-13

Blood monitoring system

#1125
20060079808
2006-04-13

Blood collecting syringe with retractable needle

#1126
20060079807
2006-04-13

Blood collecting syringe with retractable needle

#1127
20060074387
2006-04-06

Safety shield for medical needles

#1128
20060074350
2006-04-06

Blood sampling kit and method of using same

#1129
20060074349
2006-04-06

Blood sampler

#1130
20060074348
2006-04-06

Biologic Fluid Sampling Apparatus

#1131
20060058773
2006-03-16

Needle free blood collection device with male connector valve

#1132
20060052745
2006-03-09

Blood contacting sensor

#1133
20060036219
2006-02-16

Flashback blood collection needle

#1134
20060015073
2006-01-19

Safety shield for medical needles

#1135
20060015037
2006-01-19

Holding device for a medical device

#1136
20060009727
2006-01-12

Method and apparatus for an extracorporeal control of blood glucose

#1137
20060009714
2006-01-12

Blood collection needle

#1138
20060009713
2006-01-12

Blood collecting devices

#1139
20050288607
2005-12-29

Receiving device comprising an adjustable covering element

#1140
20050287679
2005-12-29

Calibration procedure for investigating biological systems

#1141
20050283093
2005-12-22

Flashback blood collection needle

#1142
20050281713
2005-12-22

System and method for sample collection

#1143
20050281445
2005-12-22

System and method for locating and accessing a blood vessel

#1144
20050276727
2005-12-15

Multiple sampling device and method for investigating biological systems

#1145
20050273019
2005-12-08

Blood collection set with venting mechanism

#1146
20050267412
2005-12-01

Blood collection assembly

#1147
20050267384
2005-12-01

Blood collection kit adapter

#1148
20050261620
2005-11-24

Syringe and a method for its utilization in analysis

#1149
20050257795
2005-11-24

Method and apparatus for locating superficial veins or specific structures with a LED light source

#1150
20050245885
2005-11-03

Blood drawing device with flash detection

#1151
20050245879
2005-11-03

Safety shield assembly

#1152
20050245870
2005-11-03

Porous multiple sample sleeve and blood drawing device for flash detection

#1153
20050245869
2005-11-03

Blood drawing device with flash detection

#1154
20050245868
2005-11-03

Blood drawing device

#1155
20050240161
2005-10-27

Needle assembly

#1156
20050226785
2005-10-13

Clot retainer

#1157
20050215958
2005-09-29

Aspiration device

#1158
20050215951
2005-09-29

Retracting needle safety device

#1159
20050209567
2005-09-22

Stress-reducing medical devices

#1160
20050197629
2005-09-08

Medical device with needle assembly shielding

#1161
20050187532
2005-08-25

Diaphragm-based reservoir for a closed blood sampling system

#1162
20050187493
2005-08-25

Safety blood collection holder

#1163
20050165330
2005-07-28

Needle type safety connector

#1164
20050148993
2005-07-07

Method and apparatus for blood sampling

#1165
20050148942
2005-07-07

Method for making a safety shield assembly and related combinations thereof

#1166
20050148033
2005-07-07

Blood compatibility testing method and device

#1167
20050143712
2005-06-30

Apparatus for collecting blood samples

#1168
20050124965
2005-06-09

Phosphatase inhibitor sample collection system

#1169
20050113717
2005-05-26

Devices for physiological fluid sampling and methods of using the same

#1170
20050107749
2005-05-19

Safety shield for medical needles

#1171
20050107748
2005-05-19

Safety shield for medical needles

#1172
20050101920
2005-05-12

Plunger rod for arterial blood collection syringes

#1173
20050101914
2005-05-12

Intravenous catheter introducing device

#1174
20050101882
2005-05-12

Safety pressure device for body fluid extraction

#1175
20050101881
2005-05-12

Cannula retractable medical collection device

#1176
20050095229
2005-05-05

Artificial organ

#1177
20050090766
2005-04-28

Tube for blood collecting with a vacuum method

#1178
20050085745
2005-04-21

Hollow needle holder

#1179
20050080385
2005-04-14

Needle apparatus with quick/safe release mechanism

#1180
20050065455
2005-03-24

Blood-collection device

#1181
20050065454
2005-03-24

Non-evacuated blood collection tube

#1182
20050059163
2005-03-17

Device and methods for collection of biological fluid sample and treatment of selected components

#1183
20050054949
2005-03-10

Plunger-less syringe for controlling blood flow

#1184
20050049559
2005-03-03

Needle protector

#1185
20050043650
2005-02-24

Blood-drawing device

#1186
20050037165
2005-02-17

Process for forming multilayer containers

#1187
20050027256
2005-02-03

Medical device with shield having a retractable needle

#1188
20050027233
2005-02-03

Devices for collecting blood and administering medical fluids

#1189
20050015058
2005-01-20

Safety system for a blood collection device

#1190
20050015055
2005-01-20

Sterilized safety syringe

#1191
20050010178
2005-01-13

Expandable penetrating needle and method of use

#1192
20050010136
2005-01-13

Blood sample collection apparatus with a simplified safety device

#1193
20050004524
2005-01-06

Flashback device for venous specimen collection

#1194
20050004513
2005-01-06

Systems and methods for detecting tissue contact and needle penetration depth

#1195
16945351
2020-10-13

Systems and methods for phlebotomy through a peripheral IV catheter

#1196
15600116
2020-03-24

Compact blood hematocrit sensing device