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Scanning electron microscopy of postoperative M-K and moist chamber-stored corneas
Abstract:
In the present study, using the in vivo test situation which all corneal donor material must meet, we performed penetrating keratoplastics utilizing corneal tissue stored for five days in either M-K medium or conventional moist chambers. Cat corneas stored for five days in M-K medium had a higher incidence of postoperative graft clarity along with an intact endothelial cell layer as determined by scanning electron microscopy than corneas stored in a conventional moist chamber. The endothelium of corneas immediately after moist chamber storage revealed minimal surface alteration which contrasted to the more severely stressed endothelium immediately after M-K storage. However, the M-K stored endothelium survived the trauma of penetrating keratoplasty much better than cells stored in moist chambers.
Insights
Corneal tissue stored in M-K medium for five days showed better graft clarity and endothelial cell survival after penetrating keratoplasty compared to conventional moist chambers.
Area of Science:
- Ophthalmology
- Transplantation immunology
- Cell biology
Background:
- Corneal transplantation is a common procedure.
- Graft clarity and endothelial cell viability are critical for successful outcomes.
- Current storage methods for donor corneas have limitations.
Purpose of the Study:
- To compare the efficacy of M-K medium versus conventional moist chambers for short-term corneal storage.
- To evaluate the impact of storage method on postoperative graft clarity and endothelial cell integrity in penetrating keratoplasty.
Main Methods:
- Penetrating keratoplasty was performed on cat corneas stored for five days.
- Storage solutions included M-K medium and conventional moist chambers.
- Endothelial cell integrity was assessed using scanning electron microscopy.
Main Results:
- Corneas stored in M-K medium exhibited higher postoperative graft clarity.
- M-K medium storage resulted in a more intact endothelial cell layer post-transplantation.
- While M-K storage initially caused more endothelial stress, these cells demonstrated better survival during surgery.
Conclusions:
- M-K medium is a superior storage solution for short-term corneal preservation compared to moist chambers.
- M-K medium enhances graft survival and clarity in penetrating keratoplasty.
- Further research into optimizing M-K medium storage protocols is warranted.