Protective Apron Research Articles

Knowledge Regarding Ionizing Radiation Exposure Safety Among Orthopedic Surgeons at Hospitals in Al-Madinah.

Background and objective The use of radiation imaging techniques in operation theaters is essential fornumerous surgical procedures and patients' overall well-being. Radiation imaging techniques enable the surgeon to have a real-time visualization of the anatomy and to perform operations with a greater chance of success, decrease rates of patient morbidity, and enablesurgeons to obtain imaging records before the patient leaves the theater room. However, with the increased use of imaging techniques in orthopedic surgical operations, orthopedic surgeons are being exposed to higher levels of radiation, and hence they can be classified as a high-risk group for occupational radiation exposure. This study aimed to assess orthopedic surgeons'awareness and knowledge regarding radiation exposure safety. Materials and methods Aquestionnaire-based descriptive cross-sectional study was conducted from January to March 2022 to assess the knowledge regarding ionizing radiation exposure safetyamong orthopedic surgeons, including consultants, specialists, and residents, at both private and governmental hospitals in Al-Madinah city, Saudi Arabia. Ethical approval was obtained from the Ministry of Health (MOH) of Al-Madinah (approval number: H-03-l.l-084). The applied statistical tests were frequency and MCT tests for univariate variables while Chi-square was applied for bivariate variables. With a 95% confidence interval (CI), a p-value of more than 0.05 was used as the cut-off value for the significance level. Results A total of 57 surgeons participated in the study, of which 57.9%were exposed to radiationtwo to three times per week. Additionally, more than half of the physicians (66.7%) were not trained to use fluoroscopy (C-arm machine). Of note, 78.9% of orthopedic surgeons reported that they used the protective apron as protective equipment, while 17.5% of them used both a protective apron and thyroid shield. However, only less than half of the orthopedic surgeons(43.9%) in our study practiced radiation safety in the operating room. Conclusion Our study revealed a lack of knowledge and awareness related to ionizing radiation exposure safety among orthopedic surgeons in Al-Madinah city, Saudi Arabia.

An Assessment of the Lead rubber aprons in Radiodiagnostic centres in South-South Nigeria

Background of Study: Radiation protection is of core importance in radiodiagnostic centres, to keep both patients care givers and staff of the centres from stochastic and non- stochastic effects of radiation. The effectiveness and protectiveness of aprons are of valuable importance, it is therefore necessary to assess these aprons to ensure efficacy. Such quality checks have not been reported in the South – South region of Nigeria. Aim: To assess in terms of their quality and therefore protective features, the lead aprons in used radiology clinics in the South-South region of Nigeria. Method: Twenty two protective lead aprons from 18 radiological clinics in South-South Nigeria were directly exposed to X-rays with average factors of 70 ± 5kVp, 16 mAs and 100 cm Source to apron distance, with 43 x 35 cm cassettes places underneath to cover the upper (thoracic half) and the lower (abdominal half) respectively. Exposed films were processed in each centre following regular processing protocols to obtain radiographs with images of the state of the aprons. The images were analyzed on the basis of each apron’s lead equivalence (content), age, brand and the type of defects observed. Defects were characterized into cracks, tears, splits and rips. Physical examination for cleanliness, wear and tear was also carried out. Results: Results showed that 68% of all the aprons under study were defective, having cracks (44%), tears (33%), splits (15%) and/or rips (8%). About 73 % of the defective aprons had more than one (1) type of defect. Up to 87% of the defective aprons had no inherent lead equivalence and manufacturer identification indicated on them. It was observed that about 73% of these defects occurred in aprons of aged between 1-10 years with the area affected in the range of 1.00 – 1000.00 mm2 . Conclusion: Over two-thirds (⅔) of lead aprons found in diagnostic radiology centres in South – South Nigeria, have shown sufficient evidence of defects to suggest that they may not be useful for radiation protection of the users.

Dosimetry assessment for mobile c-arm: use of badge attached to the equipment

The use of fluoroscopy equipment in surgical procedures exposes professionals to ionizing radiation. An important safety aspect is the correct use of personal protective equipment and monitoring of dose levels in workers. In Brazil, the Resolution of the Collegiate Board of Directors (RDC) No. 330/2019 demands the use of individual dosimeter for professionals who exceed the public dose limits. However, when personal dosimeters are not available, the International Atomic Energy Agency (IAEA) recommends attaching a dosimeter to the C-Arm, close to the detector, to estimate the dose received by medical personnel. The objective of this research was to evaluate the levels of exposure in professionals during surgical procedures in the operation room. This analysis was performed by placing OSL dosimeters on the C-arm equipment for eleven months and comparing them with the quantitative values extracted from the equipment in the routine. Two mobile fluoroscopies C-Arm equipment were used in this study. A total of 1231 procedures were evaluated, with a mean dose value of 5.8µSv per procedure. Thus, the maximum number of procedures that the same professional can perform was 140 procedures per day for a staff member considering worker dose limits and 7 procedures per day for staff members using the required protective aprons considering the public dose limits. Although the study shows that the dose limits established by regulatory bodies are above the doses recorded in clinical practice, this situation should not promote false safety in the use of ionizing radiation.

Physical strain while wearing personal radiation protection systems in interventional radiology.

ObjectivesMultiple studies show orthopedic health problems for medical staff due to wearing radiation protection aprons. The aim of this study was to evaluate the weight pressure on the shoulder as a marker of physical strain caused by different radiation-protection devices.MethodsFor the weight pressure measurement, a pressure sensor (OMD-30-SE-100N, OptoForce, Budapest, Hungary) placed on the left and right shoulder was used. Wearing different radiation protection systems the force measurement system was used to quantify the weight pressure. Measurements were acquired in still standing position and during various movements.ResultsA mean significant decreasing weight pressure on the shoulder between 74% and 84% (p<0.001) was measured, when the free-hanging radiation protection system was used in comparison to one-piece and two-piece radiation protection aprons and coats. Using two-piece radiation protection aprons, the weight pressure was significantly lower than that of one-piece radiation protection coats. If a belt was used for the one-piece radiation protection coat, the weight pressure on the shoulder was reduced by 32.5% (p = 0.003). For a two-piece radiation protection apron and a one-piece radiation protection coat (with and without belt) a significant different weight pressure distribution between the right and left shoulder could be measured.ConclusionsThe free-hanging radiation protection system showed a significant lower weight pressure in comparison to the other radiation protection devices. Apart from this, use of a two-piece radiation protection apron or addition of a belt to a radiation protection coat proved to be further effective options to reduce weight pressure.

An Innovative Approach to Electromagnetic Radiation Shielding by Graphene: An Experimental Study

The need to use electromagnetic radiation in clinical practices indicates the defense from the electromagnetic radiation itself which have a destructive impact on the human tissue and brain. Therefore, the wearable aprons as electromagnetic shields are the protective gears required to enhance their blend and structure to attain effective shielding. The aprons that are made of textile materials are widely considering protecting from electromagnetic radiation. In this context, conventional textile-materials are not appropriate, but their adaptations, which are in the form of composites, are utilized. The contemporary literature contributed by the recent past research works has several methods of making textile electromagnetic radiation shield. Recent innovations of conductive polymer application in electromagnetic radiation shielding were considered. The treating of textile materials by conductive polymer displayed higher electrical property in the form of electromagnetic radiation shield. Protective mechanisms such as aprons of electromagnetic radiation shielding are essential for enhancing their blend and structure to attain effective radiation shielding. The carbon nanotube is deliberated as a productive polymer result for the electromagnetic radiation shielding. The review experiment aimed to discuss the possibility of using a graphene coat on the polymer composite of carbon nanotube and to improve the practical solution for shielding the protective aprons. The confines of a polymer composite of carbon nanotube attenuation stages are deliberated in this article. Keywords: Carbon Nanotube, Electromagnetic Radiation, Graphene.

Abstract No. 535 Personal lead radiologic protective apron: concern for workplace hazards of lead dust contamination and need for more data

Lead radiation protection aprons (RPA) have an essential role in protecting workers from radiation exposure during diagnostic and interventional procedures. The purpose of this report is to compare lead-dust contamination of RPAs in our hospitals with published recent reports suggesting lead garments themselves may present a workplace biohazard through the presence of surface lead-dust.

Recycling of plastic wastes generated from COVID-19: A comprehensive illustration of type and properties of plastics with remedial options.

Plastic has contributed enormously to the healthcare sector and towards public health safety during the COVID-19 pandemic. With the frequent usage of plastic-based personal protective equipment (PPEs) (including face masks, gloves, protective body suits, aprons, gowns, face shields, surgical masks, and goggles), by frontline health workers, there has been a tremendous increase in their manufacture and distribution. Different types of plastic polymers are used in the manufacture of this equipment, depending upon their usage. However, since a majority of these plastics are still single-use plastics (SUP), they are not at all eco-friendly and end up generating large quantities of plastic waste. The overview presents the various available and practiced methods in vogue for disposal cum treatment of these highly contaminated plastic wastes. Among the current methods of plastic waste disposal, incineration and land filling are the most common ones, but both these methods have their negative impacts on the environment. Alongside, numerous methods that can be used to sterilize them before any treatment have been discussed. There are several new sorting technologies, to help produce purer polymers that can be made to undergo thermal or chemical treatments. Microbial degradation is one such novel method that is under the spotlight currently and being studied extensively, because of its ecological advantages, cost-effectiveness, ease of use, and maintenance. In addition to the deliberations on the methods, strategies have been enumerated for combination of different methods, vis-à-vis studying the life cycle assessment towards a more circular economy in handling this menace to protect mankind.

D-20 | Novel Catheterization Laboratory Radiation Protection System Eliminates Need for Personal Lead Aprons

Interventional Cardiologists are exposed to occupational health hazards related directly to radiation exposure and indirectly to the orthopedic burden of wearing only partially protective lead aprons. Innovations to reduce these risks are warranted.

Staff eye lens dose in interventional radiology and cardiology in Finland

PurposeThe aim of this study was to investigate the eye lens and whole-body radiation doses to interventional radiology and cardiology staff in two Finnish hospitals. MethodsSimultaneous measurements of personal dose equivalent quantities Hp(3) and Hp(10) were conducted in clinical conditions during different radiological and cardiological interventional procedures. In order to study the feasibility to estimate eye lens dose with Hp(10) measured over the protective apron or thyroid shield, the ratio between measured Hp(3) and Hp(10) was investigated. Results and conclusionsApplying the obtained ratio on Hp(10) records from national dose register showed that only a small number of interventional radiologists and cardiologists in Finland may exceed eye lens equivalent dose levels of 20 mSv per year or 100 mSv in five consecutive years, but likely do not exceed 50 mSv in a single year. For the most Finnish interventionalists, the eye lens dose is well below 10 mSv per year. Nurses and radiographers assisting in interventions are, on average, less exposed than interventionalists, and will not exceed 20 mSv per year. Based on our results, Hp(10) measured over the protective apron or thyroid shield provides a conservative estimate of the eye lens dose for interventional radiologists and cardiologists, provided that appropriate protective glasses are used.

A lightweight 0.25 mm lead equivalence protective apron for shielding radiological technologists from radiation exposure during single-photon emission computed tomography in nuclear medicine

Radiological technologists in nuclear medicine departments (NMRTs) are exposed to higher radiation doses than other nuclear medicine staff. Consequently, the Australian Radiation Protection and Nuclear Safety Agency recommends using a 0.5-mm lead equivalence protective apron (PA) for staff with radiation exposure &gt; 800 MBq of 99mTc. However, 0.5 mm PA is heavy and cumbersome to use. We evaluated the effectiveness of a 0.25 mm lead equivalence lightweight protective apron (L-PA) for NMRT radiation exposure during daily nuclear medicine procedures. The work was performed both with a phantom and in a real situation in our study. The phantom study was conducted with five radioisotopes (RI) placed 0.5 m from the human phantom with and without L-PA. In the clinical study, NMRT recorded the radiation dose for 20 days inside and outside the L-PA using clinical agents (140 examinations). In the phantom study, L-PA decreased the measured doses by 63% with 201Tl, 41% with 99mTc, 27% with 67Ga, 33% with 123I, and 10% with 131I. In the clinical study, L-PA reduced the average dose per day by 43%. Therefore, L-PA could have sufficient shielding ability for daily work, mainly using 99mTc, and could be recommended by considering PA weight.

Uncertainties in occupational eye lens doses from dosimeters over the apron in interventional practices

It is relevant to estimate the uncertainties in the measurement of eye lens doses from a personal dosimeter over the protective apron without using additional dosimetry near the eyes. Additional dosimetry for interventionists represents a difficulty for routine clinical practice. This study analyses the estimated eye doses from dosimeter values taken at chest level over the apron and their uncertainties. Measurements of H p(0.07) using optically stimulated luminescence dosimeters located on the chest over the apron and on the glasses (in the inner and outer part of the protection) were taken from ten interventionalists in a university hospital, in the period 2018–2019 during standard clinical practice. For a total sample of 133 interventional procedures included in our study, the ratio between the H p(0.07) on the glasses (left-outer side) and on the chest over the apron had an average of 0.74, with quartiles of 0.47, 0.64, 0.88. Statistically significant differences were found among operators using the U-Mann–Whitney test. The average transmission factor for the glasses was 0.30, with quartiles of 0.21, 0.25, and 0.32. Different complexity in the procedures, in the quality of the scatter radiation and in the individual operational practices, involve a relevant dispersion in the results for lens dose estimations from the over apron dosimeter. Lens doses may be between a 64% and an 88% of the over apron dosimeter values (using median or 3rd quartile). The use of 88% may be a conservative approach.

Development of the Radiation Protective Curtain for the Dose Reduction of Caregivers during Computed Tomography Examinations

During computed tomography (CT) examinations, it may be necessary to assist the patient to maintain an appropriate body position. However, there is little protective equipment available for caregivers who approach the gantry. This study aimed to evaluate the effectiveness of novel radiation protective curtains in reducing radiation exposure to caregivers while assisting patients, especially during CT examinations of the head. The absorbed dose in air around the gantry during CT examinations of the head was measured using glass dosimeters. The measurement points from the center of the gantry were 40 to 120 cm in the front, 0 to 100 cm for each side in the right and left, and 60 to 180 cm from the floor. Measurements were performed at each 20-cm interval, and all points were accumulated 10 times. The absorbed dose in air in a CT room was compared with and without the protective curtains. Next, we assumed the height of the caregiver to be 170 cm, and measured the points for the crystalline lens, chest, and abdomen. Also, using the protective glasses and the protective apron, we measured the absorbed dose in air for the caregivers behind the protective curtains. The absorbed exposure dose in air toward the crystalline lenses, chest, and abdomen was reduced more than 90% by using the protective curtains and more than 95% by using the protective apron and protective glasses in addition to them. This study showed the usefulness of protective curtains in reducing the absorbed exposure dose in air to caregivers.

OL70 - The importance of evaluating the effectiveness of lead-free x-ray protective aprons for worker safety

OL70 - The importance of evaluating the effectiveness of lead-free x-ray protective aprons for worker safety

Abstract 12034: Personal Protective Equipment and Doffing Procedures in Out-of-Hospital Practice: Assessment With a Contamination Simulation

Background: Use of personal protective equipment (PPE) by Emergency Medical Services (EMS) requires specific attention, especially when doffing contaminated clothes. The aim of this study was to evaluate which PPE was less contaminating during doffing procedures. Methodology: Six subjects tested four different PPE (pictures 1 to 4): 1) Surgical gowns (SG) 2) Full body coveralls (FBC) 3) Self-made alternative PPEs (SMP) 4) Non-surgical isolation gowns (NSIG) After donning, an invisible tracer was sprayed on the gown of each subject. Then, after doffing PPE, each subject was photographed under UV lights to show areas of fluorescent “contamination” on their body. Number of contaminated areas were noted, as well as doffing time. Results: Contamination was observed with every type of PPE and with each subject. All body areas were contaminated at least once, except the face. While doffing, SG was found to be the least contaminating PPE. Contamination was more frequent with FBCs. The mean doffing time was shorter with SG and longer with FBC (table 1). Conclusion: This study confirms that doffing is a high risk of contamination procedure. Results converge towards the selection of SG over other types of PPE, which met both contamination criteria and shorter time for doffing. Specific attention should be paid to legs and abdomino-pelvic areas. Additional protections such as protective trousers or aprons could be added.

Non-Lead Protective Aprons for the Protection of Interventional Radiology Physicians from Radiation Exposure in Clinical Settings: An Initial Study.

Radiation protection/evaluation during interventional radiology (IVR) poses a very important problem. Although IVR physicians should wear protective aprons, the IVR physician may not tolerate wearing one for long procedures because protective aprons are generally heavy. In fact, orthopedic problems are increasingly reported in IVR physicians due to the strain of wearing heavy protective aprons during IVR. In recent years, non-Pb protective aprons (lighter weight, composite materials) have been developed. Although non-Pb protective aprons are more expensive than Pb protective aprons, the former aprons weigh less. However, whether the protective performance of non-Pb aprons is sufficient in the IVR clinical setting is unclear. This study compared the ability of non-Pb and Pb protective aprons (0.25- and 0.35-mm Pb-equivalents) to protect physicians from scatter radiation in a clinical setting (IVR, cardiac catheterizations, including percutaneous coronary intervention) using an electric personal dosimeter (EPD). For radiation measurements, physicians wore EPDs: One inside a personal protective apron at the chest, and one outside a personal protective apron at the chest. Physician comfort levels in each apron during procedures were also evaluated. As a result, performance (both the shielding effect (98.5%) and comfort (good)) of the non-Pb 0.35-mm-Pb-equivalent protective apron was good in the clinical setting. The radiation-shielding effects of the non-Pb 0.35-mm and Pb 0.35-mm-Pb-equivalent protective aprons were very similar. Therefore, non-Pb 0.35-mm Pb-equivalent protective aprons may be more suitable for providing radiation protection for IVR physicians because the shielding effect and comfort are both good in the clinical IVR setting. As non-Pb protective aprons are nontoxic and weigh less than Pb protective aprons, non-Pb protective aprons will be the preferred type for radiation protection of IVR staff, especially physicians.

Changes in prevalence of nosocomial infection pre- and post-COVID-19 pandemic from a tertiary Hospital in China

BackgroundNosocomial infections (NIs) are an important cause of mortality, and increasing evidence reveals that the prevalence of NIs can be reduced through effective prevention and control measures. The aim of this study was to investigate the impact of the prevention and control measures for the COVID-19 pandemic on NIs.MethodsA retrospective study was conducted to analyze the prevalence of NIs before and after COVID-19 pandemic for 6 months in the Children’s Hospital of Soochow University.ResultsA total of 39,914 patients in 2019 and 34,645 patients in 2020 were admitted to the hospital during the study. There were 1.39% (481/34645) of patients with NIs in 2020, which was significantly lower than the 2.56% (1021/39914) of patients in 2019. The rate of critical and fatal cases was also decreased. In addition, the rate of appropriate handwashing, the number of protective gloves and aprons used per person and the number of healthcare staff per patients were significantly increased. Except for the ICU, the prevalence of nosocomial infection in most departments decreased from 2019 to 2020. Regarding the source of infections, a significant reduction was mainly observed in respiratory (0.99% vs 0.42%, p = 0.000) and digestive tract (0.63% vs 0.14%, p = 0.000). The microorganism analysis of respiratory infections indicated an obvious decline in acinetobacters and fungi. The most significant decline of pathogens in gastrointestinal infections was observed for rotavirus. The comparison of catheter-related nosocomial infections between 2019 and 2020 did not show significant differences.ConclusionsThe prevention and control measures for the COVID-19 pandemic have reduced the nosocomial infection in almost all departments, except the ICU, mainly regarding respiratory, gastrointestinal, and oral infections, while catheter-related infections did not show any differences.

Critical analysis and suggestions to improve the existing system of radiation control in X-ray rooms

This paper demonstrates the shortcomings of the existing method of radiation control in the X-ray rooms and the interpretation of the results of the measurements to assess the compliance of the working conditions of various groups of exposed individuals with radiation safety requirements. A new method of interpretation of the measurement results is proposed, considering the relative time spent by certain categories of exposed persons in the corresponding rooms during the use of the X-ray units, as well as the use of personal protective equipment (lead aprons). The interpretation of the measurement results in the treatment room according to the new approach has demonstrated the compliance of the working conditions to the Norms and Rules of radiation safety, provided that the worker is wearing a protective apron. The proposed approach to the interpretation of the results of the measurements in adjacent rooms leads to both reduced and stricter requirements for the stationary shielding. The paper includes a special focus on the incorrect calculation of stationary shielding for the installation of several X-ray units in one X-ray room within the framework of the current approach.

Availability and Utilization of Personal Protective Equipment by Nigerian Physiotherapists during COVID-19 Pandemic

Introduction: Physiotherapists are exposed to contracting infectious diseases because of the level of contact they have with patients in the course of performing their statutory clinical duties.&#x0D; Objective: The major objective of the study is to determine the availability and utilization of personal protective equipment (PPE) by Nigerian physiotherapists during the COVID-19 pandemic.&#x0D; Methods: One hundred and eighty-one (181) Nigerian physiotherapists participated in an online survey using Google Form application that lasted between September 2020 and October 2020. The data collection instrument was a 22-item close-ended online questionnaire with three domains: demographics, availability of PPE, and utilization of PPE. The authors made use of different WhatsApp platforms hosting only physiotherapists as a means of reaching out to the respondents. Data obtained from the study were analyzed using STATA 13. A p-value of less than 0.05 was considered to be statistically significant (confidence level = 95).&#x0D; Results: The result of the study shows there were high availability and utilization of facemasks and hand gloves for the Nigerian physiotherapists during the period of COVID-19 pandemic in the different health facilities; it also shows there was low availability of apron and poor availability of protective eye shield/goggles and shoes during the same period. The finding also showed there was low utilization of apron, protective glasses and shoes by the Nigerian physiotherapists during the peak of COVID-pandemic.&#x0D; Conclusions: Most Nigerian physiotherapists had more face masks and hand gloves during COVID-19 pandemic than they had protective aprons, goggles and shoes. Also, there was high utilization of facemasks and the hand gloves more than an apron, eye shield and protective shoes because the more the PPE was available the more the utilization by the Nigerian Physiotherapists.

Using personal monitoring data to derive organ doses for medical radiation workers in the Million Person Study—considerations regarding NCRP Commentary no. 30

The study of low dose and low-dose rate exposure is of central importance in understanding the possible range of health effects from prolonged exposures to radiation. The One Million Person Study of Radiation Workers and Veterans (MPS) of low-dose health effects was designed to evaluate radiation risks among healthy American workers and veterans. The MPS is evaluating low-dose and dose-rate effects, intakes of radioactive elements, cancer and non-cancer outcomes, as well as differences in risks between women and men. Medical radiation workers make up a large group of individuals occupationally exposed to low doses of radiation from external x-ray/gamma exposures. For the MPS, about 100 000 United States medical radiation workers have been selected for study. The approach to the complex dosimetry circumstances for such workers over three to four decades of occupation were initially and broadly described in National Council on Radiation Protection and Measurements (NCRP) Report No. 178. NCRP Commentary No. 30 provides more detail and describes an optimum approach for using personal monitoring data to estimate lung and other organ doses applicable to the cohort and provides specific precautions/considerations applicable to the dosimetry of medical radiation worker organ doses for use in epidemiologic studies. The use of protective aprons creates dosimetric complexity. It is recommended that dose values from dosimeters worn over a protective apron be reduced by a factor of 20 for estimating mean organ doses to tissues located in the torso and that 15% of the marrow should be assumed to remain unshielded for exposure scenarios when aprons are worn. Conversion coefficients relating personal dose equivalent, H p(10) in mSv, to mean absorbed doses to organs and tissues, D T in mGy, for females and males for six exposure scenarios have been determined and presented for use in the MPS. This Memorandum summarises several key points in NCRP Commentary No. 30.

Sexual Activity of Local Sahel Goat Breed in Niger

Aims: In Niger, the Sahel goat breed counts for around 80% of the national goat herd. However, it is scientifically little or not known. Thus, one of the aims of its zootechnical characterization is the control of its sexual activity, a fundamental physiological basis of reproductive function.&#x0D; Study Design: For this purpose, a sample of 47 Sahel goats in two phenotypically different sub-samples: from the Tahoua region (22) and Tillabéry region (25) was installed and monitored for heat control in order to characterize female sexual activities.&#x0D; Place and Duration of Study: The study was conducted for a period of 9 months (January to September) at the experimental station of University of Niamey Faculty of Agronomy.&#x0D; Methodology: Heat controls by using harnessed males with a non-marking protective apron were carried out twice daily (8 am and 5 pm).&#x0D; Results: A total of 146 heats and 100 cycles were observed. It appeared that heat starts and ends mostly in the morning (76% and 70% respectively). Annual sexual activity has gone through two phases. A phase of an almost total rupture of heat from February to April and a phase of regular sexual activity from May to September and by extension the rest of the year. The mean duration of estrus and sexual cycle are respectively 35.75 ± 15.72 hours and 20.9 ± 9.7 days with strong individual variations (12 to 132 hours and 4 to 55 days for respective estrus and sexual cycle). The “T” test showed that there are no significant differences in these parameters between the two sub-samples (Tahoua and Tillabéry).&#x0D; Conclusion: Ultimately, the estrus and sexual cycle of Niger Sahel goat are common to those of the goat species in general.