LETTER TO THE EDITOR
Year : 2015 | Volume
: 63 | Issue : 12 | Page : 931--932
Comment on: Acute visual loss with ophthalmoplegia after spinal surgery - Acid Base imbalance induced glaucoma in pediatric patients
Department of Neuro-Ophthalmology, Clinic and Glaucoma Service, AG Eye Hospital, Tiruchirappalli, Tamil Nadu, India
Dr. Natarajapillai Venugopal
No. 19, Mathuram Apartments (Behind YMCA), Officer's Colony, Puthur, Tiruchirappalli - 620 017, Tamil Nadu
|How to cite this article:|
Venugopal N. Comment on: Acute visual loss with ophthalmoplegia after spinal surgery - Acid Base imbalance induced glaucoma in pediatric patients.Indian J Ophthalmol 2015;63:931-932
|How to cite this URL:|
Venugopal N. Comment on: Acute visual loss with ophthalmoplegia after spinal surgery - Acid Base imbalance induced glaucoma in pediatric patients. Indian J Ophthalmol [serial online] 2015 [cited 2020 Jun 5 ];63:931-932
Available from: http://www.ijo.in/text.asp?2015/63/12/931/176036
We read with interest the article titled "Acute visual loss with ophthalmoplegia after spinal surgery: Report of a case and review of literature" by Mukherjee and Alam. Authors have mentioned about ischemic damage to optic nerves due to raised intraocular pressure (IOP) as a possible mechanism for loss of vision in the immediate postoperative period following prolonged surgery. We appreciate the authors' effort and the research work. We would like to highlight a few points regarding glaucomas due to acid base imbalance. Factors which increase IOP are hypoxia, metabolic alkalosis and respiratory acidosis, and increased central venous pressure (coughing, straining, increased intrathoracic pressure, trendelenburg positions, and valsalva maneuver). Pharmacological or metabolic process that increases choroidal blood volume will increase IOP. Mechanically ventilated patients with chronic lung disease (posthypercapnia syndrome) develop metabolic alkalosis. Respiratory acidosis is caused by depressed central respiratory drive and acute paralysis of the respiratory muscle. Assisted ventilation is required in children undergoing treatment for respiratory acidosis. The prevalence  of pupillary block glaucoma increases with age. However, it can occur at any age, including rare cases in childhood. Atropine and adrenaline are common drugs used in general anesthesia, which may precipitate acute angle closure glaucoma in predisposed patients.
To conclude, IOP monitoring should be performed in children undergoing intensive care treatment following either head injury or major head and neck surgery. Torchlight, fluorescein strip, topical anesthetic eye drops, direct ophthalmoscope, measuring tape, plastic rule (exophthalmometer), and tonometer (Schiotz or Tonopen) should be available in pediatric Intensive Care Unit.
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Conflicts of interest
There are no conflicts of interest.
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