Blogs/News/PSAs

Nowadays, medical technology is constantly advancing, even the suturing of wounds is helped by the machine. Surgical stapling device sare particularly frequent in some gastrointestinal surgeries. But a lot of people say it was hand-stitched before, very doubt whether the stapler works really well? After all, the shape and size of the wound changes, but the stapler does not change, so it is doubtful which is better, the stapler or manual suture?

The stapler is a machine used in medicine today as an alternative to manual suturing, mainly using titanium staples to detach or staple tissue, similar to a stapler. According to the scope of application, it can be divided into skin stapler, gastrointestinal round stapler, rectal stapler, disposable circumcision stapler, vascular stapler, hernia stapler, pulmonary cutting sutures, etc. The stapler is easy to use and saves operating time compared to manual suturing. Disposable use also prevents cross-contamination. Tightly stitched together with titanium or stainless steel staples and also moderately tight, with few side effects, effectively reducing the occurrence of surgical complications. It can also enable surgical removal of tumors that were difficult to remove in the past, which is highly recommended by doctors at home and abroad.

The effect of a stapler and a manual suture is similar, but a stapler can reduce the time of surgery and the probability of complications during manual suturing, so you can be assured of a stapler.

Victor Medical Instruments Co., Ltd is one of laparoscopic instrument companies of auto surgical staplers and minimally invasive surgery equipment, with full capability of products’ developing, manufacturing, and marketing.

1. Our surgical staplertechnology makes suturing and handling safer and is more reliable.

2. The curved shape of the staple box with different staple heights, from the inner line to the outer line in three lines of low, medium and high; reduces the risk of bleeding and ensure shorter blood supply to tissues and patient recovery time.

3. Rotating cartridges for greater flexibility in confined operating spaces.

4. New blades can be used for each use of the loading unit to provide sharpness and ensure complete tissue cutting, reducing tissue damage.

5. All cartridges are made of six lines of staple thread to maximize the safety of the anastomoses and closures.

6. The same distance control techniques to ensure that the same staple formation is maintained from beginning to end.

7. Use safe lockers to prevent accidental combustion of cartridges after use.

8. The blade position indicator indicates the position of the blade, making the operation safe.

9. The low anvil design allows for easy access to instruments and minimizes tissue damage.

10. Wider opening of the instrument jaws facilitates tissue consolidation.

11. It has variable sizes and types of cartridges that can be used for surgical operations.

12. One stapler can hold different sizes and types of boxes.

13. A symmetrical ergonomic design allows either hand to operate the device.

14. The axis can be rotated 360 degrees for better control of endoscopic surgery.

Victor Medical Instruments Co., Ltd is one of laparoscopic instrument companies of auto surgical staplers and minimally invasive surgery equipment, with full capability of products’ developing, manufacturing, and marketing.

Nano-particle Size Analyzer

Nanoptic 90 is a nanoparticle analyzer based on the well-known technique of dynamic light scattering (DLS). Nanoptic 90 can measure nano materials with size down to 1nm. The high-power long lifetime laser and high sensitivity PMT provide Nanoptic 90 the ability to demonstrate rapid and accurate testing results.

Measurement: Particle size

Particle size range: 1 to 9500nm

Dispersion type: Wet

Technology: Dynamic Light Scattering (DLS)

Features and Benefits

Fast analysis: less than 5 minutes per test.

Small quantity of sample required: 4ml and 1ml sample cell.

High-precision temperature control system provides accuracy of ±0.5°C.

Repeatability: ≤1% (GBRM D50)

Accuracy: ≤1% (GBRM D50)

Scattering angle: 90°

Dynamic light scattering (DLS)

Detector: PMT (Photomultiplier)

As the leading particle size analyzer instrument manufacturer in China in terms of brand reputation, sales volume and, most importantly, qualities, Bettersize spare no efforts on R&D each year. Always feel free to inquiry!

HFlow-1 tests the flowability of metal powder by measuring whether the sample can flow through the 2.5mm standard funnel.

The design and production of HFlow-1 Hall flow meter is based on the Chinese national standard GB / T1482-2010 and international standards ISO4490-2008.

Powder Flowability Measurement: Powder flowability

Testing sample: metal powder

Technology: Hall flow meter

As the leading particle size analyzer instrument manufacturer in China in terms of brand reputation, sales volume and, most importantly, qualities, Bettersize spare no efforts on R&D each year.

Particle size measurement using static light scattering

The particle size distribution laser diffraction as a parameter to specify a powder or dispersion plays a central role in many applications. Examples are construction material (sands, cements), pharmaceutical development, lime stones, ceramics, colored pigments, fertilizers, emulsions and may more. The range of applications is increasing permanently and hence the requirements on the measurement methods regarding size range, measuring time and reproducibility. Particularly the precise and reproducible detection of particles with sizes close to the measuring range limits as well as the simultaneous determination of particle sizes of very small particles (nanometer range) as well as large particles (lower millimeter range) for the characterization of polymodally or very broadly distributed samples provides a challenge. State-of-the-art laser diffraction technique devices such as the Bettersizer S3 Plus solve these tasks by an innovative design of the optical bench for the detection of backscattered light of very small particles and by detecting large particles by an integrated high-speed CCD camera or the combination of static light scattering and Automated Imaging.

Measuring method

In static light scattering laser light (monochromatic, coherent light) interacts with the particles, which have to be characterized in terms of particle size. In dependence of the particles' size, the light waves are scattered by the particles in a characteristic manner: the larger the particles are, the greater is the scattering in forward direction. With particles smaller about 100 nm, the scattering intensity is nearly identical in all directions.

The scattering intensity is determined by stationary detectors depending on the angle (light scattering intensity distribution). State-of-the-art laser particle analyzer such as the Bettersizer S3 Plus guarantee the determination of scattering intensities in a continuous angular range of 0.02 – 165°, i. e. in forward, side and backward direction. This is achieved by means of a so-called double lens design and oblique incidence optical system (DLOIOS technology): Fourier lenses (collective lens) are positioned between the laser and particles as well as between particles and detectors. The particles will interact with the light within a parallel laser beam. This offers the advantage that the scattered light can also be detected at very large angles (in backward scattering direction) and thus even very small particles can be measured precisely. Thanks to DLOIOS technology, the problems of conventional measurement setups can also be avoided. Therefore, neither the suitable lenses for the corresponding particle size measurement range have to be selected prior to the measurement (in comparison to the Fourier optics), nor do measurement inaccuracies result from different particle to detector distances, if not all particles lie in one plane (in comparison to the inverse Fourier optics).

To calculate the particle size distribution from the measured scattering spectra, the theory of either FRAUNHOFER or MIE is applied. The FRAUNHOFER theory is based on the hypothesis of opaque and spherical particles: the scattered pattern corresponds to a thin opaque two-dimensional plate – diffraction only occurs at the edges. Therefore no additional optical input constants of the material are necessary for this calculation. However, this theory is only suitable for mean particle sizes from approx. 5 µm.

In contrast the MIE theory uses the hypothesis of virtually translucent and spherical particles, meaning that the light permeates the matter and is scattered elastically at the atoms of the particle. The knowledge of the complex refractive index of the particles and the liquid as well is necessary. This theory is applicable for particles of all sizes.

The following figure shows an example of a volume-related particle size distribution of a calcium carbonate powder – measured with a Bettersizer S3 Plus.

The cumulative throughput curve Q3 (blue) and the resulting histogram (q3, black bar) can be seen.

Literature and norms

ISO 13320 – Particle size analysis – Laser diffraction methods

As the leading particle size instrument manufacturer in China in terms of brand reputation, sales volume and, most importantly, qualities, Bettersize spare no efforts on R&D each year.