Allogeneic limbo-deep anterior lamellar keratoplasty (Limbo-DALK)—A novel surgical technique in corneal stromal disease and limbal stem cell deficiency

by Verena Schöneberger, Volkan Tahmaz, Mario Matthaei, Sigrid Roters, Simona L. Schlereth, Friederike Schaub, Claus Cursiefen, Björn O. Bachmann

To describe a novel corneal surgical technique combining Deep Anterior Lamellar Keratoplasty (DALK) with grafting of allogeneic limbus (Limbo-DALK) for the treatment of eyes with corneal stromal pathology and limbal stem cell deficiency (LSCD).

Clinical records of six Limbo-DALKs performed in five patients diagnosed with LSCD and corneal stromal pathology requiring keratoplasty were retrospectively reviewed. All patients were diagnosed with LSCD due to various pathologies including thermal and chemical burns, congenital aniridia or chronic inflammatory ocular surface disease. Parameters analysed included demographics, diagnoses, clinical history, thickness measurements using anterior segment OCT, visual acuity, and epithelial status. Regular follow-up visits were scheduled at 6 weeks as well as 3, 6, 9, and 12 and 18 months postoperatively. Main outcome measures were time to graft epithelialisation and the occurrence of corneal endothelial decompensation.

Two grafts showed complete epithelial closure at 2 days, two at 14 days. In one eye, complete epithelial closure was not achieved after the first Limbo-DALK, but was achieved one month after the second Limbo-DALK. No endothelial decompensation occurred except in one patient with silicone oil associated keratopathy. Endothelial graft rejection was not observed in any of the grafts.

Based on the data from this pilot series, limbo-DALK appears to be a viable surgical approach for eyes with severe LSCD and corneal stromal pathology, suitable for emergency situations (e.g. corneal ulceration with impending corneal perforation), while minimising the risk of corneal endothelial decompensation.

Investigation of morbidity, length of stay, and healthcare costs of inpatient paediatric burns

Abstract

Burn injuries are the third most common cause of death in children due to trauma. Hospitalizations related to burn injuries are common. Prolonged hospitalization associated with burn treatment can result in increased resource utilization, leading to higher costs. Thus, it is essential to investigate these areas to reduce costs. The study investigated the morbidity and length of hospital stay of paediatric burn patients, as well as calculated the social security costs of hospitalization and treatment. The retrospective observational descriptive study examined the medical records of 774 paediatric patients treated in a burn intensive care unit at a tertiary medical faculty hospital between 01 March 2019 and 31 March 2022. The invoice records of payments made by the Social Security Institution to the hospital in return for health services provided to patients were examined. The healthcare costs were calculated. A total of 57.6% of the participants were boys and 79.2% were between the ages of 1–4. About 90% of the cases involved burns with a total body surface area (TBSA) of less than 20% and a 2nd-degree burn depth. Scalding was the most common cause of burns (88.2%). Among all patients, the mortality rate was 2.1% (n = 16). The mean length of hospital stay was 10.29 ± 9.59 days. The mean cost per day was 212.02 ± 190.94 US dollars ($US), and the cost per 1% TBSA was 241.70 ± 301.32 $US. According to the causes of burn injury, the mean cost of electricity was 5000.77 ± 8101.85 $US, fire 4818.02 ± 5852.22 $US, and chemical 3285.49 ± 4503.2 $US were observed in the first 3 ranks respectively. According to this study, paediatric burn cases occur due to preventable causes, and even though the mortality rate was low, the severity of burns, TBSA%, and presence of complications caused prolonged lengths of hospital stays, which caused social security costs to rise.