How does bd touch work

Ergonomic design The lancet enhances user comfort with an ergonomic design for a more comfortable grip. Easier sampling It activates only when positioned and pressed against the skin, facilitating a consistent puncture depth for easier sampling.

Improved visibility The lancet covers only a small area at the contact point, which improves the visibility of the desired puncture site.

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Venipunctures were performed according to a randomization schedule which accounted for randomization of device and arm. All blood samples were drawn by the same phlebotomist and blood collection was performed from two arms at the same time with needle and butterfly set 10 s between them consecutively.

Following centrifugation at 1, RCF for 10 min, the tubes were evaluated for visual hemolysis. Serum was tested for 4 selected routine chemistry analytes on the Mindray BS within 8 h after centrifugation Table 1.

BD EDTA tubes were inverted 8—10 times immediately after collection and visually inspected for clot formation. The presence of hemolysis was detected in serum by K, AST, P and LDH results, which have been shown to be widely accepted indicators of hemolysis [ 12 , 13 ].

In addition, visual hemolysis was assessed for each tube in the study. Tube filling rate is assessed for 5 mL SST tubes for each blood collection device by the help of a chronomometer. The study protocol was approved by the local ethics committee of Scientific Research Committee of Konya Provincial Health Directorate Approval number: For discrete and continuous variables, descriptive statistics mean, standard deviation, median, minimum value, maximum value, and percentile were given.

The assumption of normality was tested via the Shapiro—Wilk test. If the differences between the two dependent groups meet the pre-conditions of the parametric test, Paired t test; if not, it was evaluated with the Wilcoxon test. The relations among the parametric tests were evaluated by Spearman correlation coefficient. Statistical compliance between measurements was given by two-way random class correlation coefficient and concordance coefficient.

The compatibility and bias of the devices were examined with Youden and Bland Altman graphics. Released The summary statistics for each tube type and each device type are shown in Tables 1 and 2.

The mean and SD are listed to one more decimal place than that reported by the analyzer. Laboratory testing is an integral part of medical decision and an appropriate phlebotomy procedure is an important factor in collecting sufficient samples for analysis.

This can be particularly challenging with the variable skill sets of blood-drawing medical staff, failure to follow appropriate procedures may result in poor sample quality, for example, in vitro hemolysis is the most common problem [ 8 ].

As these expensive phlebotomy systems are often used excessively to draw blood for routine laboratory tests, there is a common agreement on the problem of using intravenous catheters and butterfly collection sets. While a high risk of obtaining inappropriate specimens is frequently associated with the material used for venipuncture small catheters [ 16 ], there are very few reliable researches in the literature investigating the power of butterfly collection sets on hematological, coagulation and clinical chemistry testing.

Basically, laboratory measurements appear to be unaffected by where the sample was withdrawn, whether there was a tourniquet, or the time between blood sampling and analysis [ 17 , 18 ]. On the other hand, studies suggest that blood sampling from intravenous catheters, using butterfly collection sets and other similar collection sets often leads to hemolysis resulting in higher test cancellation than using a conservative straight needle [ 16 , 19 ], [ 20 ], [ 21 ].

This has influenced the development of relevant guidelines and recommendations for collecting specimens from indwelling catheters or cannulas by the International Federation of Clinical Chemistry and Laboratory Medicine IFCC [ 22 , 23 ].

For example, sufficiently large shear stress and mechanical stress caused by the use of PVC, polyurethane and teflon catheters can affect membrane functions and integrity, causing changes in shape, cell activation, damage, and flow of intracellular components into the serum [ 20 ].

The potential alteration of cell integrity, especially during blood collection and hemolysis, can lead to unintended consequences requiring repeated blood collections, especially for hematological PLT , enzymatic AST, LDH, P and electrolytic K assays [ 16 ]. Previous studies have found that blood sampling from peripheral catheters could be clinically permitted for hemoglobin and for most of the clinical chemistry analysis and clotting parameters [ 24 ], [ 25 ], [ 26 ], [ 27 ], [ 28 ].

Although PVC and other plastic materials are widely used for disposable medical devices, they can react negatively when they contact with body tissues and fluids synovial, pleural fluids etc. While the surface hydrophobicity of several artificial surfaces and the effect of blood cells on the tubing walls are possible causes of in vitro hemostatic activation, it may be considered that collecting the blood sample in butterfly collection sets may cause variations compared to blood collection directly to the vacuum tubes with straight needles.

Although the risk of platelet activation and hemolysis increases in the long plastic tubes of butterfly collection sets, platelet counts, clotting parameters and potassium measurements are considered to be more vulnerable to changes caused by blood collection technique.

A study performed by Sonntag et al. Another study has been conducted by Lippi and colleagues [ 30 ], in which they did not observe substantial differences in routine hematological and clinical chemistry testing for samples collected with the butterfly collection sets vs. In addition, no significant difference in visual hemolysis or the hemolysis index was noted between the blood collection sets. All the CBC parameters demonstrated equivalence and no clots were detected in any BD Citrate or BD EDTA tubes collected with both device Tables 1 and 2 , no evidence of increased activation of clotting cascade or clotting was observed in anticoagulated specimens collected with both device.

The correlation between the two analytes is based on the intraclass correlation coefficient ICC. In some publications, the correlation coefficient above 0. In the ICC analysis we conducted to examine the compatibility of the two blood collection sets in by dividing into two classes. One of them is visual and individual evaluation parameters. The other is coagulation parameters and K. K is found to be ICC 0. However, for visual hemolysis, visual lipemia, K, instrument platelet cluster, tube filling speed, pain asking patient and universal pain assessment tool are found to be ICC values 0.

From these results, we supposed that compatibility between two blood collection sets are incompatible for these parameters according to ICC values Table 3 , Figure 1. However, although it has been reached to statistical significance, it should be pointed out that the overall discrepancy between the two blood collection devices was limited and mostly within the relative critical differences and current analytical quality specifications for desirable bias [ 33 ].

Based on these results, although statistically significant, the differences did not reach clinical relevance in any case for both blood collection devices. Phlebotomy equipment will keep advancing day by day; selecting the most appropriate blood collection system mainly depends on considerations of convenience, reliability, safety and cost [ 22 ]. So, using butterfly collection sets had little or no clinical effects. They may be a reliable alternative to the ordinary straight needle collection sets when indicated and within definite limitations for collecting samples for routine clinical chemistry laboratory testing.

Another limitation is that blood was not drawn from the same arms for each healthy adult. From the literature, there are limited studies investigated the butterfly collection sets on hematological, coagulation and clinical chemistry testing. We also did not standardize the needle diameter same gauge for both straight needle and butterfly collection sets.

Pain scale measurements can change depending on the patients. It is better to conduct further comparative studies. In addition, there may have been a bias in the selection of the subjects, as those who are severely needle phobic would not likely to agree about including in the study. Conflict of interest: The authors declare no conflict of interest and the authors have no competing interests.

Errors in laboratory medicine. Clin Chem ;—8.