نزيف أسفل الملتحمة
| النزيف أسفل الملتحمة | |
|---|---|
| الأسماء الأخرى | Subconjunctival hemorrhage, subconjunctival haemorrhage, hyposphagma |
 | |
| Subconjunctival hemorrhage resulting in red coloration of the white of the eye. | |
| التخصص | Ophthalmology, Optometry |
| الأعراض | Red spot over whites of the eye, little to no pain[1] |
| المضاعفات | None[2] |
| المدة | Two to three weeks[2] |
| الأنواع | Traumatic, spontaneous[2] |
| المسببات | Coughing, vomiting, direct injury[2] |
| عوامل الخطر | High blood pressure, diabetes, older age[2] |
| الطريقة التشخيصية | Based on the appearance[2] |
| التشخيص المفاضل | Open globe, retrobulbar hematoma, conjunctivitis, pterygium[2] |
| العلاج | No specific treatment[3] |
| الدواء | Artificial tears[2] |
| Prognosis | Good, 10% risk of reoccurance[2] |
| التردد | شائع[4] |
النزيف أسفل الملتحمة (إنگليزية: Subconjunctival bleeding أو إنگليزية: subconjunctival hemorrhage)، أو إنگليزية: subconjunctival haemorrhage)، هو نزيف is bleeding from a small blood vessel over the whites of the eye.[1] It results in a red spot in the white of the eye.[1] There is generally little to no pain and vision is not affected.[2][3] Generally only one eye is affected.[2]
Natural causes can include coughing, vomiting, heavy lifting, straining to pass hard stools during acute constipation or the act of "pushing" or "bearing down" during labour/childbirth as these activities can increase the blood pressure in the vascular systems supplying the retina. There are up to four vascular retinal plexuses that are supplied by tiny, delicate capillaries whose walls if encountered with a sudden amount of force from blood will rupture.[5] External causes can include direct impact/injury from an accidental bump or a physical altercation resulting in blunt force trauma. Risk factors include hypertension, diabetes, old age, and blood thinners. They occur in about 2% of newborns following a vaginal delivery.[2] The blood occurs between the conjunctiva and the episclera.[2] Diagnosis is generally based on the appearance.[2]
Generally no specific treatment is required and the condition improves in two to three weeks.[2] Artificial tears may be used to help with any irritation.[2] They occur relatively commonly.[4] Both sexes are affected equally.[2] Spontaneous bleeding occurs more commonly over the age of 50 while the traumatic type occurs more often in young males.[2]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
الأعراض والعلامات
A subconjunctival bleeding usually does not result in pain, although occasionally the affected eye may feel dry, rough, or scratchy.
A subconjunctival bleeding initially appears bright-red underneath the transparent conjunctiva. Later, the bleeding may spread and become green or yellow as the hemoglobin is metabolized. It usually disappears within 2 weeks.[6]
After one week
Same as prior after four weeks
As viewed through a slit lamp
After 48 hours
.jpg)
.jpg)
الأسباب
- It may result from being strangled
- Certain infections of the outside of the eye (conjunctivitis) where a virus or a bacterium weaken the walls of small blood vessels under the conjunctiva
- Mask squeeze from diving and not equalizing mask pressure during descent
- Eye trauma
- Coagulation disorder (congenital or acquired) including Ebola
- Head injury
- Whooping cough or other extreme sneezing or coughing[7]
- Severe hypertension
- LASIK
- Acute hemorrhagic conjunctivitis (caused by Enterovirus 70 or Coxsackie A virus)
- Leptospirosis
- Increased venous pressure (e.g., extreme g-force, straining, vomiting, choking, or coughing)[7][8] or from straining due to constipation
- Zygoma fracture (results in lateral subconjunctival bleeding)
Subconjunctival bleeding in infants may be associated with scurvy (a vitamin C deficiency),[9][10] abuse or traumatic asphyxia syndrome.[11]
Eye surgery such as LASIK, and atmospheric pressure changes such as those from diving deeply in water and aircraft altitude changes.[7][8]
التشخيص
Diagnosis is by visual inspection, by noting the typical finding of bright red discoloration confined to the white portion (sclera) of the eye.
العلاج
A subconjunctival bleeding is typically a self-limiting condition that requires no treatment unless there is evidence of an eye infection or there has been significant eye trauma. Artificial tears may be applied four to six times a day if the eye feels dry or scratchy.[12] The elective use of aspirin is typically discouraged.
المصادر
- ^ أ ب ت "What is a Subconjunctival Hemorrhage?". American Academy of Ophthalmology (in الإنجليزية). 3 July 2019. Retrieved 17 October 2019.
- ^ أ ب ت ث ج ح خ د ذ ر ز س ش ص ض ط ظ ع Doshi, R; Noohani, T (January 2020). "Subconjunctival Hemorrhage". PMID 31869130.
{{cite journal}}: Cite journal requires|journal=(help) - ^ أ ب Cronau, H; Kankanala, RR; Mauger, T (15 January 2010). "Diagnosis and management of red eye in primary care". American Family Physician. 81 (2): 137–44. PMID 20082509.
- ^ أ ب Gold, Daniel H.; Lewis, Richard Alan (2010). Clinical Eye Atlas (in الإنجليزية). Oxford University Press. p. 82. ISBN 978-0-19-534217-8.
- ^ J.P. Campbell (February 2017). "Detailed Vascular Anatomy of the Human Retina by Projection-Resolved Optical Coherence Tomography Angiography". Scientific Reports. Retrieved 11 November 2021.
- ^ Robert H. Grahamn (February 2009). "Subconjunctival Hemorrhage". emedicine.com. Retrieved 23 November 2010.
- ^ أ ب ت "Subconjunctival hemorrhage". PubMed Health on the National Institutes of Health website. May 1, 2011. Retrieved October 15, 2012.
- ^ أ ب "Subconjunctival hemorrhage". Disease.com. n.d. Retrieved October 15, 2012.
- ^ "Möller-Barlow disease". whonamedit.com. Retrieved 23 November 2010.
- ^ Bruce M. Rothschild (December 17, 2008). "Scurvy". eMedicine.com. Retrieved 23 November 2010.
- ^ Spitzer S. G; Luorno J.; Noël L. P. (2005). "Isolated subconjunctival hemorrhages in nonaccidental trauma". Journal of American Association for Pediatric Ophthalmology and Strabismus. 9 (1): 53–56. doi:10.1016/j.jaapos.2004.10.003. PMID 15729281.
- ^ Robert H. Grahamn (February 2009). "Subconjunctival Hemorrhage". emedicine.com. Retrieved 23 November 2010.
وصلات خارجية
| Classification | |
|---|---|
| External resources |