ABSTRACT
Purpose@#We compared the accuracies of formulae used to calculate intraocular lens (IOL) powers when predicting postoperative refraction, by the type of lens. @*Methods@#We retrospectively reviewed the medical records of 445 eyes (332 patients) that had undergone phacoemulsification and posterior chamber lens implantation between January 2017 and December 2019. Axial length was measured via optical low-coherence reflectometry (Lenstar LS900; Haag-Streit, Bern, Switzerland). The IOLs implanted were all one-piece acrylic IOLs, thus, the ALCON SN60WF (215 eyes), the TECNIS ZCB00 (139 eyes), and the MBI SAL302AC (91 eyes). The mean absolute errors (MAEs) and mean numerical errors (MNEs) were calculated using the SRK-2, SRK/T, Hoffer Q, Holladay, Olsen, and Barrett formulae 1-2 weeks after surgery. @*Results@#For the ALCON SN60WF, the Hagis formula yielded the lowest power and thus tended to be myopic, but we found no significant difference in the MAE. For the TECNIS ZCB00, the Olsen formula yielded the lowest power and thus tended to be myopic, and the Barrett formula yielded the lowest MAE. For the MBI SAL302AC, all MAEs and MNEs were similar. @*Conclusions@#Depending on the IOL type, the IOL power calculation formulae differed in terms of predicting postoperative refraction.
ABSTRACT
Purpose@#This study aimed to develop an evidence-based nursing practice guideline for preventing postoperative pulmonary complications (PPCs). @*Methods@#The guideline adaptation process was conducted through the 24 steps based on the guideline adaptation manual of Korean Hospital Nurses Association. @*Results@#The newly developed guideline to prevent PPCs consisted of four domains and 30 recommendations. The number of recommendations in each domain was 7 for assessment of PPCs, 17 for nursing interventions to prevent PPCs after general anesthesia, 4 for education (intended for patients and medical staff), and 2 for monitoring and recording. @*Conclusion@#The developed guidelines will contribute in standardization of nursing practice and PPCs prevention and management. We recommend the dissemination and utilization of these guidelines nationwide to improve the quality of postoperative pulmonary complication prevention.
ABSTRACT
Purpose@#We compared the accuracies of formulae used to calculate intraocular lens (IOL) powers when predicting postoperative refraction, by the type of lens. @*Methods@#We retrospectively reviewed the medical records of 445 eyes (332 patients) that had undergone phacoemulsification and posterior chamber lens implantation between January 2017 and December 2019. Axial length was measured via optical low-coherence reflectometry (Lenstar LS900; Haag-Streit, Bern, Switzerland). The IOLs implanted were all one-piece acrylic IOLs, thus, the ALCON SN60WF (215 eyes), the TECNIS ZCB00 (139 eyes), and the MBI SAL302AC (91 eyes). The mean absolute errors (MAEs) and mean numerical errors (MNEs) were calculated using the SRK-2, SRK/T, Hoffer Q, Holladay, Olsen, and Barrett formulae 1-2 weeks after surgery. @*Results@#For the ALCON SN60WF, the Hagis formula yielded the lowest power and thus tended to be myopic, but we found no significant difference in the MAE. For the TECNIS ZCB00, the Olsen formula yielded the lowest power and thus tended to be myopic, and the Barrett formula yielded the lowest MAE. For the MBI SAL302AC, all MAEs and MNEs were similar. @*Conclusions@#Depending on the IOL type, the IOL power calculation formulae differed in terms of predicting postoperative refraction.
ABSTRACT
Purpose@#This study aimed to develop an evidence-based nursing practice guideline for preventing postoperative pulmonary complications (PPCs). @*Methods@#The guideline adaptation process was conducted through the 24 steps based on the guideline adaptation manual of Korean Hospital Nurses Association. @*Results@#The newly developed guideline to prevent PPCs consisted of four domains and 30 recommendations. The number of recommendations in each domain was 7 for assessment of PPCs, 17 for nursing interventions to prevent PPCs after general anesthesia, 4 for education (intended for patients and medical staff), and 2 for monitoring and recording. @*Conclusion@#The developed guidelines will contribute in standardization of nursing practice and PPCs prevention and management. We recommend the dissemination and utilization of these guidelines nationwide to improve the quality of postoperative pulmonary complication prevention.
ABSTRACT
The brain is the highly organized organ which attributes to consciousness, memory and language. Approximately 85ml of oxygenated blood from the heart is delivered to the brain each minute. In human beings, a steady cerebral blood flow is maintained which cerebral structures are perfused roughly in proportion to their metabolic demands which are actively depend on function. Therefore, cerebral function is the most important physiologic regulator of cerebral blood flow. The measurement of cerebral blood flow is a very important toolin exploring the function of the human brain in healthand disease. An impairment of normal cerebral blood flow indicates clinical derangement of central neruous system. Besides the clinical sympatoms, cerebral blood flow investigation has become our main guideline for judging the timing of operation and prognosis of disease as well as evaluation of treatment. The determination of normal cerebral blood flow in Korean seemed to be enormously important for further study on this subject. For the purpose of establishing normal value of cerebral blood flow in Korean, the author have studied 93 healthy persons with 133Xe-inhalation method using Obrist's two compartmental analysis. Followings were the results. 1) Normal values of FI, ISI, and WIin children below the age of 9 were 113.5+/-36.9, 62.5+/-13.0 and 55.6+/-6.4 each. 2) Normal values of FI, ISI, and WI in the group above the age of 9 were 75.5+/-15.5, 44.6+/-5.7 and 43.1+/-3.95 each. 3) There was no significant difference between mean values of right and left side hemisphere. 4) There was significant decrease in r-CBF in the group above the age of 9, but the decrement by age since after the age of 9 was not significant statistically. 5) The difference of mean values among each lobe was not significant statistically.