Microcomputer monitor and blood sampler for free-diving Weddell seals

1986 ◽  
Vol 61 (4) ◽  
pp. 1570-1576 ◽  
Author(s):  
R. D. Hill
Keyword(s):  
Sample Collection ◽  
Time Intervals ◽  
Laboratory Computer ◽  
Roller Pump ◽  
Blood Samples ◽  
Weddell Seals ◽  
Arterial Blood ◽  
Swimming Depth ◽  
Collection Device ◽  
Multiple Sample

The equipment used for the first sampling of arterial blood at depth on free-diving Weddell seals Leptonychotes weddelli is described. Blood was withdrawn through an aortic catheter by a submersible, peristaltic roller pump and stored in a single- or multiple-sample collection device. The multiple sampler allowed up to eight individual blood samples to be collected during a single dive. The blood pump was controlled by a dedicated microcomputer that allowed initiation of blood sampling at flexible combinations of depth and/or time during either the descending or ascending phase of the dive. The dedicated microcomputer also recorded swimming depth, velocity, heart rate, and body temperature at selectable time intervals. These data were transmitted to a laboratory computer, and blood samples were retrieved, when the seal surfaced to breathe.

scholarly journals SneakPeek snap: a painless microneedle-based pushbutton device for early fetal sex determination

2021 ◽  
Vol 7 (3) ◽  
pp. 74-78
Author(s):  
Nina Hoang ◽  
Haley Milot ◽  
Christopher Jacob
Keyword(s):  
Sex Determination ◽  
Ease Of Use ◽  
Blood Collection ◽  
Dramatic Reduction ◽  
Sample Collection ◽  
Fetal Sex ◽  
Blood Samples ◽  
Collection Device ◽  
Perceived Pain ◽  
Collection Time

The advancement of prenatal DNA technology and growing demand for early fetal sex determination have created a need for a simple and easy-to-use blood collection device that eliminates the pain and difficulty individuals encounter when utilizing traditional methods of blood collection such as venipuncture or lancet fingerstick. In this study, Gateway Genomics, the leading provider of fetal sex testing, introduces “SneakPeek Snap”, a novel microneedle-based, self-administered blood collection device that simplifies at-home blood collection for fetal sex testing. Our data confirms that, compared to lancet finger sticks, the SneakPeek Snap device provides users several advantages including significant reduction in perceived pain, greater ease of use, a shorter sample collection time, and a dramatic reduction in risk of sample contamination. Notably, blood samples collected using the Snap device were shown to be highly accurate for fetal sex determination — with an accuracy greater than 99%

Arterio-Venous Differences in the Components of the Fibrinolytic Enzyme System

1966 ◽  
Vol 16 (01/02) ◽  
pp. 032-037 ◽  
Author(s):  
D Ogston ◽  
C. M Ogston ◽  
N. B Bennett
Keyword(s):  
Plasminogen Activator ◽  
Enzyme System ◽  
Venous Blood ◽  
Fibrinolytic Enzyme ◽  
Blood Levels ◽  
Activator Concentration ◽  
Blood Samples ◽  
Arterial Blood ◽  
Male Subjects

Summary1. The concentration of the major components of the fibrinolytic enzyme system was compared in venous and arterial blood samples from male subjects.2. The plasminogen activator concentration was higher in venous blood and the arterio-venous difference increased as its concentration rose, but the ratio of the arterial to venous level remained constant.3. No arterio-venous difference was found for anti-urokinase activity, antiplasmin, plasminogen and fibrinogen.4. It is concluded that venous blood determinations of the components of the fibrinolytic enzyme system reflect satisfactorily arterial blood levels.

scholarly journals Clinical Evaluation of the Torq Zero Delay Centrifuge System for Decentralized Blood Collection and Stabilization

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1019
Author(s):  
Kyungjin Hong ◽  
Gabriella Iacovetti ◽  
Ali Rahimian ◽  
Sean Hong ◽  
Jon Epperson ◽  
...  
Keyword(s):  
Clinical Chemistry ◽  
Blood Collection ◽  
Test Results ◽  
Sample Collection ◽  
Rapid Separation ◽  
Cell Counts ◽  
Collection Device ◽  
Precision Study ◽  
Clinically Significant ◽  
Blood Specimens

Blood sample collection and rapid separation—critical preanalytical steps in clinical chemistry—can be challenging in decentralized collection settings. To address this gap, the Torq™ zero delay centrifuge system includes a lightweight, hand-portable centrifuge (ZDrive™) and a disc-shaped blood collection device (ZDisc™) enabling immediate sample centrifugation at the point of collection. Here, we report results from clinical validation studies comparing performance of the Torq System with a conventional plasma separation tube (PST). Blood specimens from 134 subjects were collected and processed across three independent sites to compare ZDisc and PST performance in the assessment of 14 analytes (K, Na, Cl, Ca, BUN, creatinine, AST, ALT, ALP, total bilirubin, albumin, total protein, cholesterol, and triglycerides). A 31-subject precision study was performed to evaluate reproducibility of plasma test results from ZDiscs, and plasma quality was assessed by measuring hemolysis and blood cells from 10 subject specimens. The ZDisc successfully collected and processed samples from 134 subjects. ZDisc results agreed with reference PSTs for all 14 analytes with mean % biases well below clinically significant levels. Results were reproducible across different operators and ZDisc production lots, and plasma blood cell counts and hemolysis levels fell well below clinical acceptance thresholds. ZDiscs produce plasma samples equivalent to reference PSTs. Results support the suitability of the Torq System for remotely collecting and processing blood samples in decentralized settings.

scholarly journals Factors Enhancing Serum Syndecan-1 Concentrations: A Large-Scale Comprehensive Medical Examination

2019 ◽  
Vol 8 (9) ◽  
pp. 1320
Author(s):  
Kazumasa Oda ◽  
Hideshi Okada ◽  
Akio Suzuki ◽  
Hiroyuki Tomita ◽  
Ryo Kobayashi ◽  
...  
Keyword(s):  
Large Scale ◽  
Prospective Observational Study ◽  
Nitrogen Concentration ◽  
Laboratory Data ◽  
University Hospital ◽  
Endothelial Glycocalyx ◽  
Sample Collection ◽  
Blood Samples ◽  
Triglyceride Concentration ◽  
Medical Examinations

Endothelial disorders are related to various diseases. An initial endothelial injury is characterized by endothelial glycocalyx injury. We aimed to evaluate endothelial glycocalyx injury by measuring serum syndecan-1 concentrations in patients during comprehensive medical examinations. A single-center, prospective, observational study was conducted at Asahi University Hospital. The participants enrolled in this study were 1313 patients who underwent comprehensive medical examinations at Asahi University Hospital from January 2018 to June 2018. One patient undergoing hemodialysis was excluded from the study. At enrollment, blood samples were obtained, and study personnel collected demographic and clinical data. No treatments or exposures were conducted except for standard medical examinations and blood sample collection. Laboratory data were obtained by the collection of blood samples at the time of study enrolment. According to nonlinear regression, the concentrations of serum syndecan-1 were significantly related to age (p = 0.016), aspartic aminotransferase concentration (AST, p = 0.020), blood urea nitrogen concentration (BUN, p = 0.013), triglyceride concentration (p < 0.001), and hematocrit (p = 0.006). These relationships were independent associations. Endothelial glycocalyx injury, which is reflected by serum syndecan-1 concentrations, is related to age, hematocrit, AST concentration, BUN concentration, and triglyceride concentration.

scholarly journals Effect of mechanical pressure-controlled ventilation in patients with disturbed respiratory function during laparoscopic cholecystectomy

2013 ◽  
Vol 70 (1) ◽  
pp. 9-15
Author(s):  
Maja Surbatovic ◽  
Zoran Vesic ◽  
Dragan Djordjevic ◽  
Sonja Radakovic ◽  
Snjezana Zeba ◽  
...  
Keyword(s):  
Laparoscopic Cholecystectomy ◽  
Respiratory Function ◽  
Respiratory Diseases ◽  
Positive Pressure ◽  
Time Interval ◽  
Time Intervals ◽  
Controlled Ventilation ◽  
Arterial Blood ◽  
Pressure Controlled Ventilation ◽  
Pressure Controlled

Background/Aim: Laparoscopic cholecystectomy is considered to be the gold standard for laparoscopic surgical procedures. In ASA III patients with concomitant respiratory diseases, however, creation of pneumoperitoneum and the position of patients during surgery exert additional negative effect on intraoperative respiratory function, thus making a higher challenge for the anesthesiologist than for the surgeon. The aim of this study was to compare the effect of intermittent positive pressure ventilation (IPPV) and pressure controlled ventilation (PCV) during general anesthesia on respiratory function in ASA III patients submitted to laparoscopic cholecystectomy. Methods. The study included 60 patients randomized into two groups depending on the mode of ventilation: IPPV or PCV. Respiratory volume (VT), peak inspiratory pressure (PIP), compliance (C), end-tidal CO2 pressure (PETCO2), oxygen saturation (SpO2), partial pressures of O2, CO2 (PaO2 and PaCO2) and pH of arterial blood were recorded within four time intervals. Results. There were no statistically significant differences in VT, SpO2, PaO2, PaCO2 and pH values neither within nor between the two groups. In time interval t1 there were no statistically significant differences in PIP, C, PETCO2 values between the IPPV and the PCV group. But, in the next three time intervals there was a difference in PIP, C, and PETCO2 values between the two groups which ranged from statistically significant to highly significant; PIP was lower, C and PETCO2 were higher in the PCV group. Conclusion. Pressure controlled ventilation better maintains stability regarding intraoperative ventilatory parameters in ASA III patients with concomitant respiratory diseases during laparoscopic cholecystectomy.

Techniques' Comparison and Report of the North Carolina Experience

PEDIATRICS ◽  
1989 ◽  
Vol 83 (5) ◽  
pp. 843-848
Author(s):  
Thomas R. Kinney ◽  
Martha Sawtschenko ◽  
Mary Whorton ◽  
Jean Shearin ◽  
Christy Stine ◽  
...  
Keyword(s):  
North Carolina ◽  
Filter Paper ◽  
Screening Program ◽  
Medical Center ◽  
Sample Collection ◽  
Capillary Tubes ◽  
Blood Samples ◽  
Screening Programs ◽  
The North ◽  
Duke University

Controversy still exists as to the best laboratory method to use to screen newborns for sickle cell disease and other hemoglobinopathies. The proposed methods include hemoglobin electrophoresis, column chromatography, isoelectric focusing, and high performance liquid chromatography. There is also debate concerning the preferred method of sample collection. The proposed methods of sample collection include cord blood or blood obtained from the infant collected in a tube with anticoagulant or on filter paper. We compared hemoglobin electrophoresis patterns from infant blood samples collected in heparinized capillary tubes and on filter paper. This comparison was performed because hemoglobin electrophoresis of dried blood samples collected on filter paper has been advocated as a practical, reliable, and inexpensive method for mass screening programs, although the limitations of this technique have not been explored fully. We also summarize data from the North Carolina Newborn Hemoglobinopathy Screening Program, which relates to the advantages and limitations of hemoglobin electrophoresis from filter paper blood specimens. MATERIALS AND METHODS Specimens Four sets of specimens were used for this study: (1) specimens collected at Duke University Medical Center to compare hemoglobin electrophoresis patterns of hemolysates from filter paper and heparinized capillary tubes, (2) specimens collected by the North Carolina program for hemoglobinopathy screening, (3) specimens routinely collected at Duke University in heparinized capillary tubes for newborn hemoglobinopathy screening, and (4) samples for retesting to examine the error rate of the state program and to confirm screening results compatible with a hemoglobinopathy. Samples for Direct Comparison Between Filter Paper and Heparinized Specimens

Blood gas changes during panting in a small East African antelope, the dik-dik

1978 ◽  
Vol 44 (4) ◽  
pp. 534-537 ◽  
Author(s):  
M. Maskrey ◽  
P. P. Hoppe ◽  
O. S. Bamford
Keyword(s):  
Heat Stress ◽  
Heat Exposure ◽  
Blood Gases ◽  
Respiratory Alkalosis ◽  
Second Phase ◽  
Blood Gas ◽  
Climatic Chamber ◽  
East African ◽  
Blood Samples ◽  
Arterial Blood

Five adult male dik-dik (Madoqua kirkii) were exposed in a climatic chamber to an air temperature of 45 degrees C. Measurements were made of rectal temperature (Tre) and respiratory frequency (f) and arterial blood samples taken before and during heat exposure were analyzed for pH, PCO2 and PO2. During exposure, Tre and f increased in all animals. In the first 80 min dik-dik displayed thermal tachypnea and minor changes in blood gases. Continued exposure lead to hyperpnea accompanied by a fall in PaCO2 and a rise in pH. PaCO2 at first fell and then increased toward or above control levels. The dik-dik did not display second phase breathing. This observation confirms that second phase breathing is not essential to the development of respiratory alkalosis. The main conclusion of the study is that the dik-dik, unlike another heat-adapted antelope, the wildebeest (Taylor, Robertshaw, and Hoffmann. Am. J. Physiol. 217:907–910, 1969), is unable to resist alkalosis during heat stress.

Automatic mechanical alveolar gas sampler for multiple-sample collection in field

1984 ◽  
Vol 56 (5) ◽  
pp. 1436-1438 ◽  
Author(s):  
K. H. Maret ◽  
J. O. Billups ◽  
R. M. Peters ◽  
J. B. West
Keyword(s):  
Sample Collection ◽  
Mount Everest ◽  
Sampling Sequence ◽  
Multiple Sample ◽  
Expired Gas ◽  
Gas Sampler

A mechanical alveolar gas sampler using the revolver principle capable of collecting six individual expired gas samples is described. The 0.91-kg sampler collects 19-ml samples in pre-evacuated aluminum ampoules equipped with spring-loaded valves from a sampling chamber equipped with two removable one-way valves. On depression of external handles, one of six ampoules located in a removable cartridge is aligned and advanced into the sampling chamber where its valve is opened and then closed. Releasing the handles removes the ampoule from the sampling chamber and automatically rotates the cartridge through 60 degrees to position a new ampoule in preparation for the next sampling sequence. A lock-out mechanism prevents reexposure of any of the ampoules after six samples have been taken. The performance of the sampler is described including its successful use in the field to collect alveolar gas samples on the summit of Mount Everest.

Arterial blood gas tensions during breath-hold diving in the Korean ama

1993 ◽  
Vol 75 (1) ◽  
pp. 285-293 ◽  
Author(s):  
J. Qvist ◽  
W. E. Hurford ◽  
Y. S. Park ◽  
P. Radermacher ◽  
K. J. Falke ◽  
...  
Keyword(s):  
Radial Artery ◽  
Breath Hold ◽  
Blood Gas ◽  
Arterial Pco2 ◽  
Blood Samples ◽  
Arterial Blood Gas ◽  
Time Limits ◽  
Arterial Blood ◽  
Normal Ranges ◽  
Arterial Po2

Korean female unassisted divers (cachido ama) breath-hold dive > 100 times to depths of 3–7 m during a work day. We sought to determine the extent of arterial hypoxemia during normal working dives and reasonable time limits for breath-hold diving by measuring radial artery blood gas tensions and pH in five cachido ama who dove to a fixed depth of 4–5 m and then continued to breath hold for various times after their return to the surface. Eighty-two blood samples were withdrawn from indwelling radial artery catheters during 37 ocean dives. We measured compression hyperoxia [arterial PO2 = 141 +/- 24 (SD) Torr] and hypercapnia (arterial PCO2 = 46.6 +/- 2.4 Torr) at depth. Mean arterial PO2 near the end of breath-hold dives lasting 32–95 s (62 +/- 14 s) was decreased (62.6 +/- 13.5 Torr). Mean arterial PCO2 reached 49.9 +/- 5.4 Torr. Complete return of these values to their baseline did not occur until 15–20 s after breathing was resumed. In dives of usual working duration (< 30 s), blood gas tensions remained within normal ranges. Detailed analysis of hemoglobin components and intrinsic oxygenation properties revealed no evidence for adaptive changes that could increase the tolerance of the ama to hypoxic or hypothermic conditions associated with repetitive diving.

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