What fracture causes CSF leak?
Clinical Pathophysiology of Traumatic CSF Leak The most common fracture sites leading to CSF leaks following TBI are the frontal sinus (30.8%), sphenoid sinus (11.4–30.8%), ethmoid (15.4–19.1%), cribriform plate (7.7%), frontoethmoid (7.7%) and sphenoethmoid (7.7%).
Why does the Cribriform plate appear perforated?
The cribriform plate is perforated by olfactory foramina, which allow for the passage of the olfactory nerves to the roof of the nasal cavity. This conveys information from smell receptors to the brain.
What is the best test to identify CSF from fluid leaking from the ear or nose?
Testing fluid from the ear or nose for β-2 transferrin is the recommended method to assess patients for a cranial CSF leak because this approach is noninvasive as well as highly sensitive and specific. Immunofixation electrophoresis is the method typically used.
What lies on Cribriform plate?
The olfactory bulb lies on the cribriform plate of the ethmoid bone on the ventral surface of the frontal lobe (Simpson & Sweazey, 2013).
Is a CSF leak a medical emergency?
A cranial CSF leak results in a runny nose and carries a high risk of meningitis, an inflammation of the membrane around the brain and spinal cord, which can be fatal and requires emergency attention.
What is a beta 2 transferrin test?
In summary, the beta-2-transferrin assay is a highly sensitive and specific test for the presence of CSF in body fluids. This test has been employed successfully by otolaryngologists in the diagnosis of skull-base CSF leaks.
How do you diagnose a broken cribriform plate?
[4] Clear or bloody fluid draining from the nose or ear is concerning for a basilar skull fracture with CSF leak. Specifically, clear or bloody rhinorrhea is highly suspicious of a cribriform plate fracture with a dural fistula.
What nerves pass through the cribriform plate of the ethmoid bone?
Anatomic Considerations. The terminal sensory fibers of the olfactory nerve penetrate the cribriform plate of the ethmoid bone into the superior nasal cavity. These fibers connect to the olfactory bulbs on the orbital surface of the frontal lobes and provide olfactory sensation to the upper nasal cavity.
How do you check for CSF leak in nose?
A pledget study involves placing small cotton pads (called “pledgets”) into the nose. This test is used to confirm the presence of a CSF leak, although it cannot determine the exact location of the leak. To determine the exact location of the leak, a CT cisternogram would be performed.
Can you test CSF with a glucometer?
Conclusion: A glucometer accurately detects an abnormal CSF/blood glucose ratio immediately after the lumbar puncture. This cheap point-of-care method has the potential to speed up the diagnostic process of patients with bacterial meningitis.
How can you test if the cribriform plate is damaged?
What is inferior to the cribriform plate?
The olfactory bulb lies on the cribriform plate of the ethmoid bone. In this location it is inferior to medial aspects of the frontal lobe (Fig. 23.1), at the rostral end of the olfactory sulcus (see Fig. 23.7), and in the rostral portions of the anterior cranial fossa.
What is the endoscopic approach for repair of cribriform CSF leaks?
The endoscopic approach for repair of cribriform CSF leaks occurring during endoscopic ethmoidectomy was first described by Wigand and Stankiewicz in the 1980s and further detailed by many others.
Can CSF leaks from the nose be treated?
Cerebrospinal fluid (CSF) leaks from the nose, and sinuses are infrequent problems that require skilled techniques to manage. Whether iatrogenic or spontaneous, CSF leaks occurring in the cribriform area of the ethmoid sinuses are aptly suited for minimally invasive and endoscopic repair.
What are the limitations of open intracranial approaches for CSF leak repair?
Open intracranial approaches for CSF leak repair involving frontal craniotomy, first described by Dandy in the 1920s, were limited by significant morbidity, including anosmia, intracerebral hemorrhage, frontal lobe deficits, extended hospital stay, and higher recurrence rates.
Where is the lateral cribriform plate located?
The cribriform plate is suspended bilaterally by the lateral cribriform lamellae, which thicken as they extend laterally into the fovea ethmoidalis. Therefore, when performing an ethmoid skull base dissection, the surgeon is, in fact, operating above the lowest level of the anterior cranial fossa.