Turn down - turn up: a simple and low-cost protocol for preparing platelet-rich plasma

Platelet-rich plasma (PRP) is increasingly used in clinical settings to enhance tissue repair and regeneration. Prior research has shown that various centrifugation protocols can influence the concentration of platelets in PRP. However, this gap motivated the development of a new method that simplifies the process while maintaining effectiveness. Existing methods often require multiple steps and specialized equipment, increasing the risk of contamination and cost. That uncertainty drove the need for a streamlined protocol that could be applied in standard clinical environments. No prior work had resolved the challenge of achieving high platelet concentration with minimal resources. This paper's contribution lies in proposing a closed-system approach that reduces procedural complexity. The study builds on established knowledge of centrifugation techniques but introduces a novel combination of speeds and steps. It was already known that centrifugation speed and duration affect platelet yield, but this paper explores a new sequence of speeds to optimize results.

The aim of this study was to evaluate a new PRP extraction protocol and compare it with existing methods in terms of platelet concentration and procedural safety. The specific problem addressed is the need for a cost-effective and contamination-free PRP preparation process. The motivation stems from the limitations of current methods, which often involve multiple centrifugation steps and open systems. The researchers proposed that a closed-system double-spin approach could improve outcomes. This study sought to determine whether the new protocol could achieve higher platelet concentrations. The comparison with existing methods was necessary to validate the proposed technique's efficacy. The study also aimed to assess the economic feasibility of the new method. By focusing on a closed system and ordinary centrifuges, the researchers aimed to make PRP preparation more accessible.

The study involved extracting PRP from 20 volunteers using four established protocols. These included single spins at 1600 ×g and 600 ×g, as well as double spins at 300 and 700 ×g, and 600 and 900 ×g. In a separate group of 12 individuals, the new 'turn down-turn up' protocol was tested. This method used a double spin at 200 ×g and 1600 ×g in a closed system. The blood remained in the same tube throughout the process to minimize contamination. Standard laboratory equipment, including a benchtop centrifuge, was used for all protocols. Platelet counts were adjusted to baseline values for comparison. Analysis of covariance (ANCOVA) was employed to assess differences in platelet concentration across methods. The study also measured the cost of disposable materials used in each protocol.

The four established protocols yielded platelet concentrations 1.15-, 2.07-, 2.18-, and 3.19-fold higher than baseline, respectively. The new 'turn down-turn up' protocol produced a platelet concentration 4.17-fold higher than baseline. This result had a 95% confidence interval of 3.09 to 5.25. The difference compared to the double spin at 600 and 900 ×g method was not statistically significant (p=0.063). The new protocol demonstrated the highest platelet concentration among all tested methods. The study also found that the total cost of disposable materials was less than US$10.00 per individual. The closed-system approach reduced the risk of contamination during extraction. These findings suggest the new protocol is both effective and economical.

The authors propose that the 'turn down-turn up' protocol is a simple and safe method for PRP extraction. The study suggests that this method achieves higher platelet concentrations than previously described techniques. The researchers emphasize the closed-system design as a key factor in reducing contamination risks. The study supports the use of standard centrifuges and minimal equipment to prepare PRP. The cost-effectiveness of the new protocol is highlighted as a significant advantage. The findings suggest that this method could be widely applicable in clinical settings. The authors conclude that the new protocol is suitable for use with ordinary laboratory equipment. They propose that this approach could improve the accessibility of PRP therapy.