Assessment of Thermal Comfort in Operating Rooms Using PMV-PPD Model

Khalil, Alsaid; Bassuoni, M.M.; Elsamadony, Mohamed; Raslan, M. S.

doi:10.21608/erjeng.2020.131508

Cited by 8 publications

(7 citation statements)

References 26 publications

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“…In ORs, it is fundamental, and at the same time extremely difficult, to reconcile the needs of different occupants: the patient, under anesthesia and practically naked, needs quite a high temperature and humidity to avoid perfrigeration and minimize dehydration of the exposed tissues; the operating team, on the other hand, favor a relatively cool, well-ventilated and dry environment as they have to sustain high performance for a prolonged period. Furthermore, individual physiological characteristics, and the different activities performed, might affect the thermal comfort levels of healthcare personnel [ 26 , 27 , 28 , 29 , 30 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

Ten-Year Evaluation of Thermal Comfort in Operating Rooms

et al. 2022

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The microclimate is a particularly important environmental aspect in operating rooms (ORs), where more than in other hospital environments, it is extremely important, and at the same time extremely difficult, to reconcile the needs of different types of occupants (patients and operators). Moreover, unsuitable microclimatic conditions may affect the onset of infection. The present study aimed to analyze the periodic monitoring of the microclimatic conditions carried out in ORs over 10 years, to verify the adequacy of the thermal comfort conditions for all occupants. The evaluation of thermal comfort was carried out using the Fanger indices and the standards required by current legislation and specific guidelines. Non-compliant values for at least one parameter were found in 98.8% of the examinations performed in the ORs. A condition of thermal discomfort was calculated for 3.6% of healthcare professionals and 98.3% of patients. The monitoring of microclimatic conditions is particularly important in the OR as an indicator of inadequate functioning of the air conditioning system, which might affect the thermal comfort of all occupants and lead to microbial contamination of the room.

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Section: Discussionmentioning

confidence: 99%

Ten-Year Evaluation of Thermal Comfort in Operating Rooms

et al. 2022

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“…The questionnaire included questions regarding basic personal information (age, height and weight), dress and subjective heat sensation (3: hot, 2: warm, 1: lightly warm, 0: neutral, À1: lightly cool, À2: cool, À3: cold). 42,43 In total, 723 valid questionnaires were prepared for pregnant women. The basic information about the subjects is presented in Table 4.…”

Section: Subjective Questionnaire Surveymentioning

confidence: 99%

Predicted mean vote model for thermal comfort evaluation of pregnant women considering the effects of metabolic rate

Fang

et al. 2022

Indoor and Built Environment

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In this study, on-site measurements of the summer air-conditioning environment in obstetric clinics of six hospitals in Guangzhou, China, and subjective questionnaire surveys of pregnant women regarding hot and humid environments were carried out. A total of 723 valid questionnaires were obtained. In order to determine the appropriate metabolic rate, three methods were used in this study to obtain three different metabolic rate values, including ASHRAE 55-2020 for healthy adults in a sedentary state 1.0 met, pregnant women after 5 months of pregnancy 1.2 met based on medical tests and the resting metabolic rate of pregnant women 0.66 met. Linear fitting was performed with three predicted mean votes (PMVs) and thermal sensation vote (TSV). The mean TSV (MTSV) and PMV models were established to estimate the actual thermal neutral value (25.3°C) and the predicted thermal neutral value (26.1°C) for pregnant women. The PMV model for pregnant women was linearly corrected, and the corrected PMV model coincided with the actual thermal sensory MTSV model. The corrected PMV estimate was 0.60 PMV + 0.17, and the corrected thermal neutral estimate was 25.3°C. Finally, a simplified model of the relationship between the PMV for pregnant women and the relative humidity, mean radiant temperature, wind speed and air temperature was obtained.

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“…In recent years, with the advent of engineering simulation tools, it has become possible to perform these calculations quickly and efficiently, and test and optimize specific spaces for thermal comfort. One such software is, for example SimScale, which helps display the data in the form of PMV and PPD fields [6]. SimScale is able to simulate comfort parameters in a space with a procedure based on the computational fluid dynamics (CFD) model.…”

Section: Creating a Comfort Map With Simulationmentioning

confidence: 99%

“…Regarding thermal comfort parameters, several examples can be found in the relevant literature, including Fanger, who represented thermal comfort parameters in the form of iso-PMV (predicted mean vote) trends in his research [3]. Examples about computing or simulating thermal comfort parameters from a small number of measurements in large spaces can be also found in the literature [4][5][6]. In [4,6], comfort parameters were investigated in healthcare facilities with strict air conditioning and clothing constraints.…”

Section: Introductionmentioning

confidence: 99%

“…Examples about computing or simulating thermal comfort parameters from a small number of measurements in large spaces can be also found in the literature [4][5][6]. In [4,6], comfort parameters were investigated in healthcare facilities with strict air conditioning and clothing constraints. A common 2 of 14 remark is the difficulty of creating an environment which is widely comfortable for staff members with different thermal requirements.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Method to Compute Thermal Parameters of the Comfort Map Using a Decreased Number of Measurements

et al. 2021

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This paper presents an empirical approach to design ideal workplaces using the PMV-PPD (predicted mean vote–predicted percentage dissatisfied) method set in ISO 7730 in terms of thermal comfort. The key concept behind our method is that the overall employee satisfaction might be improved if they can select the most suitable desk based on their personal comfort preferences. To support desk sharing, we designed a comfort map toolkit, which can visualize the distribution of comfort parameters within office spaces. The article describes the steps to create comfort maps with methods already widely used, as well as a new one developed by our research team, including the measurement procedures and the theoretical background required.

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Assessment of Thermal Comfort in Operating Rooms Using PMV-PPD Model

Cited by 8 publications

References 26 publications

Ten-Year Evaluation of Thermal Comfort in Operating Rooms

Ten-Year Evaluation of Thermal Comfort in Operating Rooms

Predicted mean vote model for thermal comfort evaluation of pregnant women considering the effects of metabolic rate

An Efficient Method to Compute Thermal Parameters of the Comfort Map Using a Decreased Number of Measurements

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