What separates the ethmoid sinuses?
Table of Contents
What separates the ethmoid sinuses?
Additionally, the ethmoid sinuses are divided into groups of cells by bony basal lamellae. The most imporant one is the basal lamellae of the middle turbinate which separates the ethmoid into anterior and posterior groups with different drainage patterns.
Where is the Osteomeatal complex located?
The maxillary sinuses are located beneath the cheekbones, above the upper teeth. The maxillary sinus drains into what is called the osteomeatal complex, which is an opening on the outer wall of the nasal cavity.
What is Osteomeatal complex and its function and importance?
Osteomeatal complex represents the final common pathway for drainage and ventilation of the frontal, maxillary and anterior ethmoid air cells [1, 2]. The obstruction of this narrow region is a key factor in the development of chronic sinusitis [3–5].
Where does ethmoid sinus drain into?
Ethmoid Sinuses The anterior ethmoid cells drain into the ethmoid infundibulum, in the middle meatus. [21] The posterior ethmoid cells drain into the sphenoethmoidal recess located in the superior meatus.
What is in ethmoid sinus?
Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.
What is Omu in sinuses?
The ostiomeatal complex (OMC) or ostiomeatal unit (OMU), sometimes less correctly spelled as osteomeatal complex, is a common channel that links the frontal sinus, anterior ethmoid air cells and the maxillary sinus to the middle meatus, allowing airflow and mucociliary drainage.
What drains into hiatus semilunaris?
The anterior ethmoidal air cells drain into the hiatus. The hiatus is also connected to the frontal sinus by the frontonasal duct. The middle ethmoid air cells drain into the ethmoidal bulla. The maxillary sinus also drains into the semilunar hiatus here, posteriorly.
What is the hiatus semilunaris and Infundibulum?
The infundibulum is an air-containing space that is bounded by the uncinate process medially, the lamina papyracea laterally, and the ethmoidal bulla posteriorly. The hiatus semilunaris is two-dimensional, defining the extreme medial opening of the infundibulum.
What is the function of ethmoid sinuses?
The primary function of the ethmoid sinus, like all the sinus cavities in the skull, is to provide lubrication (mucus) to the inner nose. In addition to creating mucus, the sinuses — including the ethmoid sinus — reduce the skull’s overall weight and make one’s voice more resonant as they grow in size during puberty.
Why is the ethmoid sinuses important?
What is OMC blockage?
Background: It is universally accepted that osteomeatal complex (OMC) disease is linked to the subsequent development of chronic rhinosinusitis without nasal polyps (CRSsNPs) via postobstructive mechanisms. The role of OMC obstruction in the pathogenesis of CRSwNPs is less clear.
Where does ethmoid sinus drain?
What drains to ethmoid bulla?
The middle ethmoid air cells drain into the ethmoidal bulla. The maxillary sinus also drains into the semilunar hiatus here, posteriorly. In the inferior nasal meatus, the pin is in the opening of the nasolacrimal duct, draining the lacrimal sac near the eye into the nasal cavity.
What is the ethmoid sinus Infundibulum?
The ethmoid infundibulum is a pyramidal space that facilitates the drainage of the maxillary, anterior ethmoid, and frontal sinuses. [4] The superior attachment of the uncinate process determines the spatial relationship of the frontal sinus drainage.
What is the ethmoid infundibulum?
The ethmoid infundibulum is a curved cleft of the ethmoid bone which leads into the anterior portion of the hiatus semilunaris. It is bordered medially by the uncinate process and laterally by the orbital plate of the ethmoid.
