Maintaining the effectiveness of medicines, especially vaccines, serums and toxoids, directly depends on compliance with strict temperature conditions at all stages of the supply chain. Immunobiological medicinal products (ILP) belong to the category of temperature-sensitive medicines, violation storage conditions of which can lead to irreversible chemical changes and loss of therapeutic properties. That is why the question of how and where the temperature in the refrigerator is recorded is critical for pharmaceutical companies, pharmacies and medical institutions.
Modern requirements for pharmaceutical refrigeration equipment dictate the use of not just household freezers, but specialized systems with a continuous monitoring function. The process of recording data on the microclimate inside the chamber has become a mandatory procedure regulated by state standards and GSP (Good Storage Practice) rules. Without documented data on the temperature regime, the use of drugs is considered an unacceptable risk to the health of patients.
In this article we will analyze in detail the technical aspects of organizing the storage of medical products, the types of devices used and the legal nuances of keeping accounting logs. Understanding these processes is necessary for everyone who works with vital medicines in order to prevent spoilage of expensive vaccines and avoid penalties from regulatory authorities.
Regulatory requirements for the storage of medical products
The main document regulating the storage conditions of medicines in the Russian Federation are the GSP rules, approved by order of the Ministry of Industry and Trade. According to these standards, for pharmaceutical substances and finished products that require refrigeration, a temperature range from +2 to +8 degrees Celsius must be provided. Any deviation outside this corridor requires an immediate response and recording in the appropriate documentation.
In addition, the Sanitary Rules and Norms (SanPiN) establish strict requirements for equipment used in medical and pharmacy organizations. Domestic refrigeratorseven if they are able to maintain the required range, often not suitable for official certification due to lack of built-in recording systems and uneven cold distribution. Professional equipment must have certificates of conformity and passports confirming their suitability for storing medicines.
Temperature readings should be recorded continuously or at the minimum possible interval to prevent missing critical moments, for example, when opening the door or power surges in the network. The data is stored electronically and/or on paper for the periods established for each group of drugs, which allows you to track the life history of each batch of the vaccine.
⚠️ Attention: The regulatory framework may be updated. Always check the current requirements of SanPiN and orders of the Ministry of Health in official sources before purchasing equipment or changing accounting procedures.
It is important to note that the requirements relate not only to the very fact of the presence of cold, but also to the uniformity of its distribution. In different zones of the chamber, the temperature may differ, therefore mapping the temperature field is a mandatory procedure when putting the refrigerator into operation. This allows you to identify “hot” and “cold” spots where the most sensitive drugs should not be placed.
Equipment for recording temperature data
To ensure control, specialized devices are used, which are divided into several categories depending on complexity and functionality. The simplest option is a thermometer with a remote probe, which shows the current value, but does not save history. However, to fully comply with GSP rules, devices with a data logging function are required.
The most common solution is Thermal recorders (loggers). These compact devices are equipped with a built-in sensor and memory, where readings are recorded at specified intervals (for example, every 10 minutes). There are models with a USB interface for downloading data to a computer and devices that transmit information via wireless communication channels to a central monitoring system.
- 🌡️ Digital thermohygrometers: display temperature and humidity, often have a sound alarm when the range is exceeded.
- 📟 GSM temperature recorders: send SMS notifications to the person in charge in case of emergency climate change inside the chamber.
- 💻 Software complexes: allow you to connect several sensors to one computer and build graphs of changes in real time.
Modern Pharmaceutical refrigerators often already equipped with built-in control systems that meet all necessary standards. However, even in this case, it is recommended to use an independent external logger as a backup data source. This will avoid loss of information in the event of a main system failure or failure of the built-in controller.
Procedure for logging temperature
Keeping a temperature log is a mandatory document confirming proper storage conditions. Entries in the journal must be made regularly, without omissions or corrections not certified by the signature of the responsible person. If electronic systems are used, the log is generated automatically, but requires periodic uploading and archiving.
Each entry in the log must contain not only numerical values, but also time stamps. If paper media are used (printouts from a thermal printer or manual notes from a thermometer), they must be bound and sealed with the organization's seal. This eliminates the possibility of falsifying data retroactively, which is especially important during Roszdravnadzor inspections.
| Parameter | Requirement | Check frequency |
|---|---|---|
| Air temperature | +2...+8 °C | Continuous or 2 times a day |
| Humidity | Up to 75% (usually) | Daily |
| Package integrity | No damage | At each acceptance |
| Equipment condition | Properly | Daily (visual) |
The log also records any emergency situations: defrosting, power outages, opening doors for a long time. For each such event, the time interval and measures taken to stabilize the regime must be indicated. Responsible employee is required to sign each page of the log, confirming the accuracy of the information entered.
☑️ Daily check of the refrigerator
Actions in case of temperature violation
Situations when the temperature in the refrigerator goes beyond the established limits (+2...+8 °C) are called temperature excesses. They can occur due to a compressor breakdown, a prolonged door opening, a power outage or a malfunction of the defrost system. In such cases, the algorithm of personnel actions must be clearly worked out.
The first step is to immediately record the fact of the violation, indicating the exact time of detection. If the refrigerator continues to operate but does not maintain temperature, the drugs should be moved to backup equipment with a suitable mode. In the event of a complete power outage, it is necessary to use refrigerants or dry ice, taking precautions so as not to freeze liquid forms of drugs.
⚠️ Attention: Freezing liquid vaccines (for example, DPT, hepatitis B) leads to their irreversible damage. This can be visually determined by the appearance of flakes or a change in consistency, but only a laboratory test will give an accurate answer.
After the situation has stabilized, a damage assessment is carried out. Quarantine zone This is the place where all drugs exposed to the wrong temperature are placed before a decision is made on their further fate. It is prohibited to use such medications without the permission of the manufacturer or laboratory quality control.
What to do with medications after defrosting?
Drugs that have been defrosted or heated for a long time are labeled as “Quarantine.” It is forbidden to throw them away yourself. It is necessary to draw up a report and contact the supplier or manufacturer to obtain instructions for disposal or confirmation of suitability. Laboratory testing of control samples is often required.
Features of placing drugs inside the chamber
The correct arrangement of packages inside the refrigeration chamber plays a key role in maintaining a stable temperature. Air should circulate freely between shelves and rows of preparations. Densely packing the chamber “to capacity” leads to the formation of stagnation zones, where the temperature can differ significantly from the sensor readings.
ILP should be stored at a distance of at least 10-15 cm from the walls and bottom of the chamber, as well as from ventilation grilles. This is especially important for freezers, where the risk of localized hypothermia is higher. The use of plastic containers or baskets helps to structure the space, but they should not block the flow of cold air.
- ❄️ Do not store against the back wall: This is where condensation and ice most often form, which is dangerous for paper packages.
- 🚫 Avoid door shelves: When the door is opened, the temperature here changes most quickly, which is critical for sensitive people vaccines.
- 📦 Grouping by series: facilitates inventory rotation (FEFO principle - first out, first out) and random control.
Each type of drug has its own nuances. For example, some vaccines require storage strictly in a vertical position, others allow horizontal storage. Instructions for medical use is always a priority document that determines the method of storing a particular medicinal product.
Validation and verification of equipment
Any equipment used for storing medical products must undergo regular validation. This is a set of measures that confirms that the refrigerator is able to maintain the specified temperature under any operating conditions. During the validation process, the temperature field is mapped using a variety of sensors.
Verification of measuring instruments (thermometers, recorders) is carried out in accredited metrological centers in accordance with the schedule, usually once a year. The instruments must be marked with verification marks, and the verification certificates themselves must be stored in the archives of the organization. The use of unverified devices makes all entries in the journal legally void.
When purchasing a new refrigerator or moving an existing one to a new location (even to another room), the validation procedure must be repeated. Changes in external conditions, such as room temperature or proximity to heat sources (radiators, direct sunlight), can significantly affect the operation of the compressor and the cold distribution system.
How often should the refrigerator be validated?
Initial validation is carried out before commissioning. Repeated - at least once every two years, as well as after any repairs affecting the cooling system, or changes in placement conditions. Validation is also required when systematic temperature violations are detected.
Can a household refrigerator be used for vaccines?
The use of household refrigerators for storing medical products in pharmacies and medical institutions is generally prohibited by GSP rules unless they are specially qualified and equipped with continuous monitoring and alarm systems. For home, the recommendations are milder, but the principle of “a separate refrigerator for medicines” remains relevant.
What to do if the temperature recorder is discharged?
This is considered a violation of the monitoring regime. You should immediately replace the batteries, adjust the time and continue recording. A record is made in the log of the period of missing data and the reason (discharge). During this period, drugs are transferred to quarantine until the circumstances are clarified and, possibly, laboratory control.
Is it necessary to record the temperature at night?
Yes, the temperature must be monitored around the clock. It is at night, when personnel are absent, that the risk of unnoticed equipment breakdown is highest. Therefore, the use of stand-alone recorders with an alarm or GSM alert is an industry standard.