Related Experiment Video
Updated: Oct 4, 2025
07:48
Artificial Thermal Ageing of Polyester Reinforced and Polyvinyl Chloride Coated Technical Fabric
Published on: January 29, 2020
6.7K
ISO 4135, Fourth Edition: Two Decades of Progress in ISO/TC 121
1Debra R. Milamed, MS, is the committee manager for ISO/TC 121/SC 4 and associate in anaesthesia at Harvard Medical School in Boston, MA.
Biomedical Instrumentation & Technology
|February 3, 2022
Summary
The International Organization for Standardization (ISO) published ISO 4135, a new vocabulary standard for anesthetic and respiratory equipment. This standard promotes consistent terminology across all ISO/TC 121 documents.
Area of Science:
- Medical Device Standards
- Respiratory Care Terminology
Background:
- The International Organization for Standardization (ISO) Technical Committee (TC) 121 has been active for two decades.
- Standardization in medical equipment is crucial for safety and efficacy.
Purpose of the Study:
- To announce the publication of ISO 4135, fourth edition.
- To highlight the expanded scope of ISO/TC 121.
- To promote consistent and specific terminology in respiratory and anesthetic equipment standards.
Main Methods:
- Publication of a new vocabulary standard (ISO 4135).
- Development of related standards, such as ISO 19223:2019.
- Collaboration within ISO/TC 121 and its subcommittees.
Main Results:
- ISO 4135:2023, Anaesthetic and respiratory equipment-Vocabulary, fourth edition, is now available.
- The scope of ISO/TC 121 has expanded significantly over 20 years.
- ISO 4135 complements ISO 19223:2019 for enhanced terminological consistency.
Conclusions:
- The new ISO 4135 standard enhances the terminological framework for anesthetic and respiratory devices.
- Consistent terminology across ISO/TC 121 standards improves clarity and reduces ambiguity.
- This publication reflects the ongoing work and expansion of ISO/TC 121.
More Related Videos
Related Concept Videos
01:21Isochoric and Isobaric Processes
3.7K
A thermodynamic process that occurs at constant volume is called an isochoric process. According to the first law of thermodynamics, heat supplied or removed from the system is partially utilized to perform work and change the internal energy of the system. However, in an isochoric process, the volume remains constant. Hence, the work done by the system is zero. Therefore, the exchange of heat changes the internal energy of the system only.
Suppose 1000 g of water is heated from 40...
Suppose 1000 g of water is heated from 40...
3.7K
02:46Uncertainty in Measurement: Reading Instruments
47.9K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
47.9K
01:21Isothermal Processes
4.1K
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
4.1K
02:28Cycloalkanes
14.0K
Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding acyclic alkane; therefore, their general formula is CnH2n. The structural formulas of cycloalkanes are simplified using the line-angle representation. The regular polygons are used to represent the cycloalkane rings, with each side representing a carbon-carbon bond.
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
14.0K
02:30Stability of Substituted Cyclohexanes
13.5K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
13.5K
01:18Mechanical Characteristics of Steel
793
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
793