What is pars tensa?

The pars tensa (plural: partes tensae) is the tense portion of the tympanic membrane and refers to the main portion of the membrane. It extends from the anterior and posterior malleolar folds at the level of the lateral process of malleus to the inferior extent of the tympanic membrane at its attachment.

What is the function of pars flaccida?

Retraction of the elastic pars flaccida (PF) is the first reaction to a middle ear (ME) negative pressure in adults. Such retraction reduces middle ear volume, thereby elevating the ambiant pressure. PF retraction acts therefore as a buffering mechanism which counteracts ME negative pressure.

Where is pars flaccida located?

eardrum
In human anatomy, the pars flaccida of tympanic membrane or Shrapnell’s membrane (also known as Rivinus’ ligament) is the small, triangular, flaccid portion of the tympanic membrane, or eardrum. It lies above the malleolar folds attached directly to the petrous bone at the notch of Rivinus.

What is the difference between Pars Tensa and pars flaccida?

You could also imagine the pars tensa to be similar to a drum surface. It is the portion of the eardrum responsible for translating sound waves into mechanical movement. The pars flaccida, as the name suggests, is less “taut” and also thicker. It drapes across the superior portion of the malleus.

What is pars flaccida cholesteatoma?

Retraction pocket cholesteatoma with mouth at pars flaccida. Acquired cholesteatomas usually arise from focal retractions of the TM. Retraction pockets are invaginations of the TM that form in patients with chronic Eustachian tube dysfunction, negative middle ear pressure, and focal collapse of the TM.

What does the doctor see when looking in your ears?

An ear examination can find problems in the ear canal, eardrum, and the middle ear. During an ear examination, a tool called an otoscope is used to look at the outer ear canal and eardrum. The otoscope has a light, a magnifying lens, and a funnel-shaped viewing piece with a narrow, pointed end called a speculum.

What is Scutum ear?

The scutum (plural: scuta) is a sharp bony spur that is formed by the superior wall of the external auditory canal and the lateral wall of the tympanic cavity. It forms the lateral margin of Prussak space.

What is the pars flaccida stomach?

It contains the right and the left gastric arteries. In the abdominal cavity it separates the greater and lesser sacs on the right. It is sometimes cut during surgery in order to access the lesser sac. The hepatogastric ligament consists of a dense cranial portion and the caudal portion termed the pars flaccida.

What happens if the tympanic membrane is damaged?

A ruptured eardrum can result in hearing loss. It can also make the middle ear vulnerable to infections. A ruptured eardrum usually heals within a few weeks without treatment. But sometimes it requires a patch or surgical repair to heal.

Can an ENT see your Eustachian tube?

An ENT consultant will test your hearing including a Tympanometry which measures the pressure your ear is at. They may ask you to swallow, and they will also check your Eustachian tubes with a fibre optic camera that’s passed painlessly up your nose.

What is the pars tensa?

The pars tensa is the portion of the tympanic membrane that is the largest. It’s what people tend to think of when they think of the “eardrum.”. As the name suggests, it is “taut,” much like if you stretched plastic wrap on top of a bowl. You could also imagine the pars tensa to be similar to a drum surface.

What type of epithelium lines the esophagus?

– Lamina propria A thick stratified squamous nonkeratinized epithelium lines the esophagus. The lamina propria underlying the epithelium possesses lymphoid structures and localized mucous glands (not shown here) in the lower third and sometimes in the upper third. The muscularis mucosae is usually absent in the upper third.

What is stratified squamous epithelium in the middle ear?

This is differentiated from an infected retraction pocket of the pars tensa or a retraction pocket cholesteatoma. Stratified squamous epithelium may also be present in the middle ear as other clinical or pathological entities, such as metaplastic islands of the mucosa in chronic ears with central perforations.

Is the esophagus stratified or stratified?

A thick stratified squamous nonkeratinized epithelium lines the esophagus. The lamina propria underlying the epithelium possesses lymphoid structures and localized mucous glands (not shown here) in the lower third and sometimes in the upper third.