1
|
Zeng Y, Yamamoto Y, Hayashi Y, Uchida T. Evaluation of fibrinogen concentration by clot firmness using a dielectric blood coagulation test system. J Anesth 2023; 37:56-63. [PMID: 36316533 DOI: 10.1007/s00540-022-03131-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 10/20/2022] [Indexed: 11/05/2022]
Abstract
PURPOSE To determine if fibrinogen concentration can be evaluated by dielectric permittivity changes in dielectric blood coagulation testing (DBCM) during cardiovascular surgery with cardiopulmonary bypass (CPB). METHODS We performed a single-center prospective observational study at a university hospital. One hundred patients undergoing cardiovascular surgery with CPB were enrolled. Whole-blood samples were obtained after weaning from CPB, and dielectric clot strength (DCS) was measured by intrinsic pathway testing with or without heparinase in DBCM. The FIBTEM test was performed during rotational thromboelastometry using the same samples, and maximum clot firmness (MCF) was evaluated. Spearman's correlation analysis was performed, and receiver operating characteristics (ROC) curve analyses were used to evaluate the performance of hypofibrinogenemia detection. RESULTS DCS showed a strong positive correlation with plasma fibrinogen concentration (Rs = 0.76, P < 0.0001). The area under the ROC curve for evaluating plasma fibrinogen concentration < 200 mg/dL was 0.91 (95% confidence interval (CI) 0.85-0.97) for DCS, compared with 0.88 (95% CI 0.81-0.94) for FIBTEM MCF. The optimal cutoff value of DCS was 17.0 (sensitivity 94%, specificity 80%). CONCLUSIONS DCS variables showed a significantly strong correlation with plasma fibrinogen concentration, and the diagnostic performance for hypofibrinogenemia was comparable to that for FIBTEM MCF. This novel methodology has the potential to provide a point-of-care test with sufficient accuracy for the detection of perioperative hypofibrinogenemia during cardiovascular surgery with CPB.
Collapse
Affiliation(s)
- Yulin Zeng
- Department of Anesthesiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Yudai Yamamoto
- Department of Anesthesiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Yoshihito Hayashi
- Biomedical R&D Department, R&D Division, Medical Business Group, Sony Imaging Products & Solutions Inc., Bunkyo-Ku, Tokyo, 113-8519, Japan
- Tokyo Laboratory 11, R&D Center, Sony Group Corporation, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Tokujiro Uchida
- Department of Anesthesiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan.
| |
Collapse
|
2
|
Sifuna MW, Koishi M, Uemura T, Tatekawa H, Haneishi H, Sapkota A, Takei M. Connector sensors for permittivity-based thrombus monitoring in extracorporeal life support. J Artif Organs 2020; 24:15-21. [PMID: 32638141 DOI: 10.1007/s10047-020-01190-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 06/23/2020] [Indexed: 11/26/2022]
Abstract
Extracorporeal circulation is vital in cardiovascular surgery, but thrombus formation at connector interface is a major threat. Optical coherence tomography (OCT) is presently used to monitor thrombogenesis at connectors, but it is expensive to install and complex to use. This study fabricated and evaluated a connector sensor for real-time permittivity-based thrombus monitoring at tube-connector interface. Computational simulations were initially done to pre-evaluate the applicability of connector sensor. The sensor was fabricated by incorporating two stainless steel electrodes on acrylic tube for measuring permittivity changes at the tube-connector interface. OCT images were also taken from the interface at intervals for comparisons. Results show that the sensor was able to detect thrombus formation at the interface in form of sudden rise in permittivity after time t = 9 min. The permittivity changes were confirmed by OCT images which showed thrombus formation after time t = 14 min implying that permittivity changes were due to regional aggregation of red blood cells. The connector sensor is therefore envisioned as an affordable alternative to OCT for real-time permittivity-based monitoring of thrombogenesis at tube-connector interface.
Collapse
Affiliation(s)
- Martin W Sifuna
- Division of Fundamental Engineering, Department of Mechanical Engineering, Graduate School of Science and Engineering, Chiba University, 1-33, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| | - Madoka Koishi
- Division of Fundamental Engineering, Department of Mechanical Engineering, Graduate School of Science and Engineering, Chiba University, 1-33, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| | - Takuo Uemura
- Division of Fundamental Engineering, Department of Mechanical Engineering, Graduate School of Science and Engineering, Chiba University, 1-33, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| | - Hanako Tatekawa
- Department of Medical Engineering, Graduate School of Science and Engineering, Chiba University, Chiba, 263-8522, Japan
| | - Hideaki Haneishi
- Center for Frontier Medical Engineering, Chiba University, Chiba, 263-8522, Japan
| | - Achyut Sapkota
- Department of Information and Computer Engineering, National Institute of Technology, Kisarazu College, 2-11-1 Kiyomidai-Higashi, Kisarazu, Chiba, 292-0041, Japan.
| | - Masahiro Takei
- Division of Fundamental Engineering, Department of Mechanical Engineering, Graduate School of Science and Engineering, Chiba University, 1-33, Inage-ku, Chiba-shi, Chiba, 263-8522, Japan
| |
Collapse
|
3
|
Maji D, De La Fuente M, Kucukal E, Sekhon UDS, Schmaier AH, Sen Gupta A, Gurkan UA, Nieman MT, Stavrou EX, Mohseni P, Suster MA. Assessment of whole blood coagulation with a microfluidic dielectric sensor. J Thromb Haemost 2018; 16:2050-2056. [PMID: 30007048 PMCID: PMC6173630 DOI: 10.1111/jth.14244] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Indexed: 12/12/2022]
Abstract
Essentials ClotChip is a novel microsensor for comprehensive assessment of ex vivo hemostasis. Clinical samples show high sensitivity to detecting the entire hemostatic process. ClotChip readout exhibits distinct information on coagulation factor and platelet abnormalities. ClotChip has potential as a point-of-care platform for comprehensive hemostatic analysis. SUMMARY Background Rapid point-of-care (POC) assessment of hemostasis is clinically important in patients with a variety of coagulation factor and platelet defects who have bleeding disorders. Objective To evaluate a novel dielectric microsensor, termed ClotChip, which is based on the electrical technique of dielectric spectroscopy for rapid, comprehensive assessment of whole blood coagulation. Methods The ClotChip is a three-dimensional, parallel-plate, capacitive sensor integrated into a single-use microfluidic channel with miniscule sample volume (< 10 μL). The ClotChip readout is defined as the temporal variation in the real part of dielectric permittivity of whole blood at 1 MHz. Results The ClotChip readout exhibits two distinct parameters, namely, the time to reach a permittivity peak (Tpeak ) and the maximum change in permittivity after the peak (Δεr,max ), which are, respectively, sensitive towards detecting non-cellular (i.e. coagulation factor) and cellular (i.e. platelet) abnormalities in the hemostatic process. We evaluated the performance of ClotChip using clinical blood samples from 15 healthy volunteers and 12 patients suffering from coagulation defects. The ClotChip Tpeak parameter exhibited superior sensitivity at distinguishing coagulation disorders as compared with conventional screening coagulation tests. Moreover, the ClotChip Δεr,max parameter detected platelet function inhibition induced by aspirin and exhibited strong positive correlation with light transmission aggregometry. Conclusions This study demonstrates that ClotChip assesses multiple aspects of the hemostatic process in whole blood on a single disposable cartridge, highlighting its potential as a POC platform for rapid, comprehensive hemostatic analysis.
Collapse
Affiliation(s)
- D Maji
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
| | - M De La Fuente
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
| | - E Kucukal
- Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - U D S Sekhon
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - A H Schmaier
- Department of Medicine, Hematology and Oncology Division, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Medicine, Hematology and Oncology Division, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - A Sen Gupta
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - U A Gurkan
- Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, OH, USA
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - M T Nieman
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
| | - E X Stavrou
- Department of Medicine, Louis Stokes Veterans Administration Medical Center, Cleveland, OH, USA
- Department of Medicine, Hematology and Oncology Division, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - P Mohseni
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
| | - M A Suster
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
| |
Collapse
|