Tongji Hospital of Huazhong University of Science and Technology Licenses Innovative Drainage Bag with Colorimetric Function for RMB 33,000 Upfront Payment

Recently, Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology released a public notice on the transformation of scientific and technological achievements, proposing to“A Drainage Bag with Colorimetric Function for Drainage Fluid”Patent AdoptionDown payment of RMB 33,000 + 5% commission on subsequent salestransferred via negotiated pricing, with the transferee beingWuhan Ruike Biotechnology Co., Ltd.. The drainage bag involved in this transaction features patented technology for medical drainage bags with colorimetric analysis of drainage fluid, innovatively adoptingDual Colorimetric Card Design, in combination withConvenient Sampling Tube and Drainage Tube Fixation PatchSuch practical structures break through the limitations of traditional clinical practice, which relies on physicians’ experience to assess the pathological status of drainage fluid. By enabling rapid and precise evaluation of patients’ conditions through standardized color comparison, they hold significant value for improving clinical diagnostic and treatment efficiency and advancing technological upgrades in medical drainage devices. The inventor of this patent isShen Ke and his team.

In clinical diagnosis and treatment,Characteristics of Drainage Fluid, Particularly the Proportion of Blood Components, is a key indicator for assessing patient condition. For postoperative patients, the degree of bloodiness in wound drainage fluid directly reflects the progress of wound healing and the risk of hemorrhage; for patients with urological or gastrointestinal diseases, the presence of blood in urine or abdominal drainage fluid serves as a core basis for determining lesion activity and disease severity. These data directly guide physicians in adjusting subsequent treatment plans.

However, in actual clinical practice, the detection of bloody drainage fluid faces numerous obstacles. Such drainage fluids are often mixed with solid components such as blood clots, fragments of necrotic tissue, and cellular debris, which interfere with the visual assessment of the fluid’s color intensity and degree of hematuria, thereby significantly increasing the difficulty of pathological evaluation.

More critically, there is currently no universally adopted scoring scale for assessing the bloodiness of drainage fluid in clinical medicine, resulting in a lack of standardized evaluation criteria. In existing diagnostic and treatment workflows, hospitals generally use traditional drainage bags that only provide basic fluid collection capabilities. Consequently, medical personnel must rely on their individual clinical experience to make subjective judgments regarding the degree of bloodiness in the drainage fluid. This approach not only introduces significant inter-observer variability and assessment errors but also requires substantial time for repeated observation and comparison.

Meanwhile, due to the lack of unified documentation standards, descriptions of bloody drainage fluid by different medical personnel and across various departments are inconsistent, resulting in significant discrepancies in medical record entries. This not only hinders the periodic review and summary of individual patient treatment outcomes but also prevents the standardized aggregation, statistical analysis, and interpretation of large volumes of clinical data. Consequently, it is difficult to generate valuable evidence-based medical data, which to some extent constrains the improvement of clinical care quality and the advancement of related medical research.

Furthermore, the structural design of traditional drainage bags has significant shortcomings. They are not equipped with dedicated sampling devices, requiring medical personnel to perform additional punctures on the drainage bag for sampling. This process is not only cumbersome but also poses risks of contamination and leakage of the drainage fluid. Additionally, the single method of securing the drainage tube makes it prone to dislodgement and displacement, compromising the stability and effectiveness of the drainage.

The core innovation of this drainage bag lies in“Dual Color Chart Collaborative Color Matching”design concept. The first colorimetric card is directly attached to the side of the drainage bag, while the second colorimetric card is integrated into the drainage tube adjustment assembly. Both cards are available in either paper or liquid material formats and feature a range of graded comparative colors. This dual-card comparison method effectively eliminates interference from solid components such as blood clots and necrotic tissue in bloody drainage fluid. Medical personnel can directly and accurately compare the color of the drainage fluid in the bag with the colorimetric cards, enabling rapid assessment of the corresponding pathological conditions and standardization of evaluation criteria.

In terms of structural functionality, this patent also incorporates multiple practical optimizations.A dedicated sampling tube with a rubber stopper is installed at the bottom of the bag body., medical personnel do not need to puncture the bag body; they can extract samples by simply piercing the rubber stopper with the sampler needle, which simplifies the operational process and avoids the risk of drainage fluid contamination and leakage;The outer wall of the drainage tube is equipped with a fixation patch featuring a sliding sleeve., the sliding sleeve allows for free positional adjustment, and the adhesive strips on both sides can firmly adhere to the patient's body, significantly reducing the risk of drainage tube dislodgement or displacement.

Furthermore,A hanging loop and a fixing clip are installed at the top of the drainage bag., it can be flexibly adapted to two fixation methods: hanging or clamping, meeting the usage requirements of different clinical scenarios such as wards and outpatient clinics. The integrated design combining colorimetry, sampling, fixation, and hanging functions not only standardizes and refines the assessment of drainage fluid but also significantly enhances the convenience and safety of clinical operations, providing practical instrumental support for improving diagnostic and treatment efficiency.

Medical drainage devices are critical instruments used in clinical diagnosis and treatment to collect fluid and gas accumulations from human body cavities, directly impacting postoperative recovery and therapeutic outcomes. A variety of novel medical drainage devices, developed to address diverse clinical needs, have been successively introduced. These devices achieve technological breakthroughs across multiple dimensions—including safety protection, precise control, anti-overflow venting, and diagnostic assistance—thereby providing superior solutions for clinical drainage procedures.

Jiangsu Rongye Technology Co., Ltd.Developed byCarrying Device for Thoracic Drainage Bags, comprising a box body, box lid, strap, and residual-length mechanism; its core linkage structure of movable pulleys, fixed pulleys, and an electric linear actuator can rapidly release pre-stored tubing slack upon accidental traction of the drainage tube, thereby buffering impact energy and fundamentally eliminating the risk of drainage tube dislodgement, which significantly enhances the safety of postoperative cardiothoracic surgery patients during mobilization;

Changde First People's HospitalR&DClinical Ascites Drainage Device, equipped with a limit valve adjustment assembly and a flow regulator, enabling precise control of drainage on/off by rotating the knob, while utilizing sealed connectors to prevent ascites leakage and bacterial ingress, thereby addressing the difficulties in controlling clamping force and the risk of catheter deformation associated with traditional clamps, and ensuring drainage safety for patients with ascites due to liver cirrhosis, tumors, and other conditions;

Affiliated Hospital of Yangzhou University (Yangzhou First People's Hospital)DevelopedDrainage Bag with Venting Function, featuring a drainage tube, an air vent, and a sealing assembly; when the fluid volume in the bag reaches a preset threshold, the isolation plate automatically shuts off both conduits, effectively preventing fluid overflow from the air vent, thereby eliminating environmental contamination during procedures and preventing loss of patient body fluids;

The introduction of these innovative devices, covering multiple niche scenarios such as thoracic drainage and ascites drainage, has achieved a leap from passive protection to active response, from extensive operations to precise control, and from empirical judgment to scientific assessment. They not only provide healthcare professionals with more efficient and safer operational tools but also significantly enhance patient comfort and safety during drainage therapy, offering strong support for reducing the risk of clinical complications and accelerating patient recovery.