(344 days)
ARJ Medical URITEST 50 urine analyzer is a semi-automated, bench top instrument which is intended for prescription, in vitro diagnostic use with the URITEST 10 Urinalysis Reagent Strips manufactured by ARI Medical, Inc. This system performs qualitative detection of Nitrites and semi-quantitative detection of Urobilinogen, Bilirubin, Ketone, Blood, Protein, Leukocytes, Specific gravity and pH. The instrument uses the accompanying check strip for daily calibration.
ARI Medical URITEST 50 Urinalysis Analyzer is for use in professional near patient (point-of-care) facilities and centralized laboratory. The analyzer is intended for use in screening at-risk patients to assist diagnosis in the following areas: Kidney Function Urinary Tract infections Carbohydrate metabolism Liver Function Acid-Base balance Urine Concentration
ARJ Medical Uritest 500 urine analyzer is a semi-automated, bench top instrument which is intended for prescription, in vitro diagnostic use with the URITEST 10 Urinalysis Reagent Strips manufactured by ARJ Medical, Inc. This system performs qualitative detection of Nitrites and semi-quantitative detection of Urobilinogen, Bilirubin, Ketone, Blood, Protein, Leukocytes, Glucose, Specific gravity and pH. The instrument uses the accompanying check strip for daily calibration.
ARJ Medical URITEST 500 Urinalysis Analyzer is for use in professional near patient (point-of-care) facilities and centralized laboratory. The analyzer is intended for use in screening at-risk patients to assist diagnosis in the following areas: Kidney Function Urinary Tract infections Carbohydrate metabolism Liver Function Acid-Base balance Urine Concentration
ARJ Medical Uritest 50 and Uritest 500 urine analyzer is a kind of semi-automatic photoelectronic colorimeter that can be used together with the Uritest 10 Urine Reagent Strips manufactured by ARJ Medical, Inc. Adopting the advanced "super-high luminosity cold light source reflection determination" technology, the "high luminosity cold light source" has two main advantages. (1) the usable life of a cold light is longer than the normal light source (2) the temperature of the normal light source will increase during testing, affecting the test result vs the temperature of the cold light source is constant not potentially affecting the result. It can finish the tests on 10 kinds of biochemical components in urine within 30 seconds, and it also can revise the affects toward the test result which is caused by ambient temperature, ambient light, acid-base scale and abnormally colored sample. The Uritest 50 and Uritest 500 urine analyzers are in vitro-diagnostic devices (IVDD).
Here's an analysis of the acceptance criteria and study details for the URITEST 50 and URITEST 500 Urine Analyzers, based on the provided text:
1. Table of Acceptance Criteria and Reported Device Performance
The provided document does not explicitly state numerical acceptance criteria (e.g., minimum sensitivity, specificity, or agreement percentages). Instead, the criterion for device performance is implicitly defined as providing "test results consistent with laboratory methods and performance comparable to that of the Bayer Clinitek 50 Urine Analyzer and the Bayer Clinitek 500."
Therefore, the table below reflects this comparative performance and the conclusion drawn from the study.
| Acceptance Criterion (Implicit) | Reported Device Performance |
|---|---|
| Test results consistent with laboratory methods. | The studies demonstrated that professional users in centralized and point-of-care (POC) hospital, clinical and doctor's office settings can obtain valid urinalysis test results. ARJ Medical studies showed that the URITEST 50 and URITEST 500 Urinalysis Analyzer provide test results consistent with laboratory methods. |
| Performance comparable to Bayer Clinitek 50 Urine Analyzer and Bayer Clinitek 500. | The results of the URITEST 50 and URITEST 500 urinalysis were compared to results obtained from Bayer Clinitek 50 and Clinitek 500 Urine Analyzers. The studies showed performance comparable to that of the Bayer Clinitek 50 Urine Analyzer and the Bayer Clinitek 500 in point-of-care (POC), hospital, clinical and doctor's office setting. |
| Suitable for use in point-of-care (POC), hospital, clinical, and doctor's office settings. | The studies demonstrated that professional users in centralized and point-of-care (POC) hospital, clinical and doctor's office setting can obtain valid urinalysis test results. The URITEST 50 and URITEST 500 Urinalysis Analyzer is suitable for use in point-of-care (POC), hospital, clinical and doctor's office setting. |
| Provides 10 reagent tests with similar composition and performance to US-marketed devices. | The URITEST 50 and URITEST 500 Urinalysis Analyzer provide 10 reagent tests of urinalysis that are similar in composition and performance to reagent tests currently provided by devices on the U.S. market. (This is a statement of similarity to predicate devices, implying performance meets the standard of those devices for the 10 tests.) |
| Capable of qualitative detection for Nitrites and semi-quantitative for other parameters. | The Uritest 50 and Uritest 500 provide a qualitative result for Nitrites and a semi-quantitative result for Urobilinogen, Bilirubin, Ketone, Blood, Protein, Leucocytes, Glucose, Specific gravity, and pH of urine specimen. (This is a statement of intended function, which the study implicitly validated through comparison with predicate devices performing the same functions.) |
2. Sample Size Used for the Test Set and Data Provenance
- Total Sample Size (Test Set): 901 urine samples
- 520 natural negative samples
- 381 positive natural urine samples
- Distribution by Site:
- No.1 Clinical Hospital of Jilin University: 135 Negative, 110 Positive (245 total)
- China-Japan Friendship Hospital of Jilin University: 180 Negative, 140 Positive (320 total)
- The People's Hospital of Jilin Province: 205 Negative, 131 Positive (336 total)
- Data Provenance: The data was collected from three hospital laboratory settings in China (as indicated by the names of the hospitals: "No.1 Clinical Hospital of Jilin University," "China-Japan Friendship Hospital of Jilin University," and "The People's Hospital of Jilin Province"). The samples were "natural samples" and "unaltered," indicating they were prospective or retrospectively collected real-world biological samples. Given the study took place in hospital settings, it implies a clinical context.
3. Number of Experts Used to Establish the Ground Truth for the Test Set and Qualifications of Those Experts
The document does not specify the number of experts used or their qualifications to establish ground truth for the test set. The ground truth was established by comparing the URITEST 50/500 results to those obtained from the Bayer Clinitek 50 and Clinitek 500 Urine Analyzers, which served as the reference method.
4. Adjudication Method for the Test Set
The document does not describe an adjudication method in the traditional sense involving expert consensus for conflicting readings. The comparison was solely against the results from the predicate devices (Bayer Clinitek 50 and 500).
5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study Was Done
No, a Multi-Reader Multi-Case (MRMC) comparative effectiveness study was not explicitly described in the provided text. The study involved instrumental readings of urinalysis strips by the URITEST devices and comparison to predicate devices, rather than an assessment of human reader performance with or without AI assistance. The study "demonstrated that professional users... can obtain valid urinalysis test results," but this refers to the usability and outcome when using the device, not an evaluation of human readers' diagnostic accuracy with AI.
6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done
Yes, the study primarily functions as a standalone performance evaluation of the URITEST 50 and URITEST 500 instruments. It assesses the instruments' ability to read urinalysis strips and provide results, comparing these instrumental readings to those of predicate devices. While professional users are involved in operating the device and handling samples, the performance being measured is that of the analyzer itself, operating autonomously to interpret the strips.
7. The Type of Ground Truth Used
The ground truth for the test set was established by comparison to a legally marketed predicate device's results. Specifically, the results from the URITEST 50 and URITEST 500 were compared to those obtained from the Bayer Clinitek 50 and Clinitek 500 Urine Analyzers. This effectively uses the predicate devices' established performance as the "ground truth" or reference standard for equivalence.
8. The Sample Size for the Training Set
The document does not provide any information regarding a distinct training set sample size or how the device itself was trained. This implies that the device is a rule-based or spectrophotometric analyzer, not an AI/machine learning model in the modern sense that requires a separate training phase with labeled data. Its "training" would be through its design, calibration, and engineering specifications.
9. How the Ground Truth for the Training Set Was Established
As no training set is described for an AI/machine learning model, the concept of establishing ground truth for a training set does not apply in the context presented by this document for these devices. The device's operational parameters would have been set during its development and manufacturing, likely based on chemical reaction principles and calibration against known standards.
§ 862.2900 Automated urinalysis system.
(a)
Identification. An automated urinalysis system is a device intended to measure certain of the physical properties and chemical constituents of urine by procedures that duplicate manual urinalysis systems. This device is used in conjunction with certain materials to measure a variety of urinary analytes.(b)
Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 862.9.