Final answer:
The Cytobrush is the instrument commonly used to collect endocervical cells during a Pap smear for analysis by a cytotechnologist.
Step-by-step explanation:
Collection of Endocervical Cells
The instrument commonly used to collect endocervical cells is a Cytobrush. During a medical test known as a Pap smear, a healthcare provider uses this tool to gently gather cells from the uterine cervix of a patient. The collected cells are then sent to a medical lab, where a cytotechnologist stains and examines them for any abnormalities that could indicate conditions like cervical cancer or a microbial infection. The Cytobrush is effective in collecting a sufficient and intact layer of cells from the cervix, which is crucial for an accurate examination.
It's important to note that while a sterile cotton swab can be used for sample collection in other contexts, such as preparing a wet mount for microscopy, the Cytobrush is specifically designed for collecting endocervical cells due to its ability to obtain a more comprehensive sample from the cervical canal.