Publications by authors named "T Trommer"
Article Synopsis
- Increasing economic pressure is driving the need for better optimization of operational processes in surgical operating rooms (ORs), particularly in arthroscopic surgery, to ensure efficient use of limited resources and handle complex workflows.
- A study was conducted that recorded and analyzed perioperative processes from 53 surgeries at a university hospital and 66 at an outpatient clinic, using a newly developed software toolset for detailed workflow analysis.
- The analysis revealed significant differences in performance, with the outpatient clinic consistently performing faster in preoperative and postoperative phases compared to the university hospital.
Purpose: Degeneration of the cartilage after anterior cruciate ligament reconstruction (ACL-R) is known, and further deterioration can be expected in patients with tunnel malplacement or partial meniscal resection. It was hypothesized that there is a significant increase in cartilage degeneration after failed ACL-R.
Material And Methods: Isolated ACL revision surgery was performed in 154 patients at an interval of 46 ± 33 months (5-175 months) between primary and revision surgery.
Purpose: Effusion, impaired muscle function and knee instability are considered as some of the most important factors effecting outcome following anterior cruciate ligament reconstruction (ACL-R) but the impact on revision ACL-R remains unclear. It was hypothesized that these factors will significantly worsen clinical outcome following revision ACL-R.
Methods: Seventy knees (13 female and 57 male) were followed retrospectively after revision ACL-R at a mean follow-up of 47.
An optimization method, based on an acoustic waveguide model of chimney and resonator, was developed and tested by laboratory measurements of experimental chimney pipes. The dimensions of the chimney pipes are modified by the optimization algorithm until the specified fundamental frequency is achieved, and a predetermined harmonic partial overlaps with an eigenfrequency of the pipe. The experimental pipes were dimensioned by the optimization method for four different scenarios and were built by an organ builder.
View Article and Find Full Text PDFIn the sound spectrum of flue organ pipes in addition to the usual harmonic partials, sometimes a series of equidistant but not harmonic lines can be found. This phenomenon has been observed in the recorded sound of pipes from different pipe ranks. The second set of spectral lines is similar to "frequency combs" used in optics for accurate measurement of optical frequencies.
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