scholarly journals Accuracy in the Execution of Pre-operative Plan for Limb Alignment and Implant Positioning in Robotic-arm Assisted Total Knee Arthroplasty and Manual Total Knee Arthroplasty: A Prospective Observational Study

2021 ◽  
Author(s):  
Jai Thilak ◽  
Balu C. Babu ◽  
Mohan Thadi ◽  
Vipin Mohan ◽  
T. Arun Kumar ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Observational Study ◽  
Knee Arthroplasty ◽  
Prospective Observational Study ◽  
Robotic Arm ◽  
Limb Alignment ◽  
Implant Positioning ◽  
Total Knee

scholarly journals Changes in perioperative hemoglobin and hematocrit in patients undergoing total knee arthroplasty: a prospective observational study of optimal timing of measurement

2020 ◽  
Vol 48 (11) ◽  
pp. 030006052096930
Author(s):  
Chenrong Ke ◽  
Naifeng Tian ◽  
Xiumeng Zhang ◽  
Mochuan Chen
Keyword(s):  
Total Knee Arthroplasty ◽  
Observational Study ◽  
Knee Arthroplasty ◽  
Prospective Observational Study ◽  
Optimal Timing ◽  
Preoperative Period ◽  
Hidden Blood Loss ◽  
Significant Difference ◽  
Total Knee ◽  
Hb Concentration

Objective This study was performed to depict the patterns of change in the perioperative hemoglobin (Hb) concentration and hematocrit (Hct) and to identify the optimal timing of Hb and Hct measurement in patients undergoing total knee arthroplasty (TKA). Methods This prospective observational study involved 302 consecutive patients who underwent TKA. The patients were kept in hospital for 1 full week postoperatively. Hb and Hct measurements were performed preoperatively and on days 1 to 7 postoperatively and then during clinic visits at 1, 3, and 6 months postoperatively. Results The Hb concentration and Hct decreased during the first few days postoperatively and reached a nadir on postoperative day 4 and 3, respectively; they then recovered in the following days. Significant differences in the Hb concentration and Hct were detected between the preoperative period and day 1, between days 1 and 2, between days 2 and 3, between day 7 and 1 month, and between 1 and 3 months. A significant difference in the Hct was also detected between 3 and 6 months. Conclusion The optimal timing of Hb and Hct measurement is on postoperative day 3 or 4. This timing accurately reflects ongoing hidden blood loss to better guide blood transfusions.

scholarly journals Robotic Arm-Assisted Total Knee Arthroplasty in the Setting of Combined Extra-articular Deformities of the Femur and Tibia

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Sharma Cook-Richardson ◽  
Rasesh Desai
Keyword(s):  
Total Knee Arthroplasty ◽  
Surgical Treatment ◽  
Treatment Option ◽  
Knee Arthroplasty ◽  
Mechanical Axis ◽  
Robotic Arm ◽  
Implant Positioning ◽  
Total Knee ◽  
Anatomical Axis ◽  
Bone Deformities

In this case, we will describe a 68-year-old man with combined femoral and tibial bone deformities who underwent robotic arm-assisted total knee arthroplasty (RATKA) to treat his severe osteoarthritis in the setting of extra-articular deformities that altered the native anatomical axis and the kinematics of the deformed extra-articular bony structures which chronically generated a neomechanical axis. The combination of severe osteoarthritis with extra-articular deformities made the RATKA method the best surgical treatment option taking into account altered kinematics of the native joint which conventional jig-based total knee arthroplasty would not have prioritized during bony cuts and implant positioning. The patient underwent successful knee arthroplasty with robotic arm-assisted technology with restoration of the mechanical axis.

The Learning Curve of Reaching the Planned Limb Alignment in Robotic-Arm-Assisted Total Knee Arthroplasty

2021 ◽  
Author(s):  
Tejbir S. Pannu ◽  
Jesus M. Villa ◽  
Isaac Schultz ◽  
Wael K. Barsoum ◽  
Carlos A. Higuera ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Learning Curve ◽  
Knee Arthroplasty ◽  
Operative Time ◽  
Robotic Arm ◽  
Perioperative Outcomes ◽  
Second Phase ◽  
Consecutive Series ◽  
Limb Alignment ◽  
Total Knee

AbstractEvidence on the learning curve associated with robotic-arm-assisted total knee arthroplasty (ra-TKA) is scarce and mostly based on operative time. Thus, the objective of this study was to assess a surgeon's learning experience based on accuracy to reach planned limb alignment and its impact on surgical-characteristics, limb-alignment, and perioperative-outcomes. A retrospective chart review was conducted on a consecutive series of 204 primary ra-TKAs (patients), performed by a single surgeon in a single institution (3/7/2018-to-6/18/2019). Cumulative summation control sequential analysis was used for the assessment of the learning curve using accuracy of reaching the planned limb alignment establishing that surgeries had an initial-learning-phase, followed by a second-consolidation-phase. Baseline demographics, operative/tourniquet times, prosthesis type, and limb alignment were compared between these two phases. Length of stay, discharge disposition, complications, reoperation/readmission (90 days), and total morphine equivalents (TMEs) prescribed were compared between phases. Independent sample t-tests, and chi-squared analyses were performed. ra-TKA demonstrated a learning curve of 110 cases for reaching planned limb alignment (p = 0.012). Robotic experience resulted in significantly more proportion of knees in neutral-axis postoperatively (p = 0.035) and significant reduction in TMEs prescribed (p = 0.04). The mean operative and tourniquet time were found to be significantly lower in second-phase versus the first-phase (p for both < 0.0001). ra-TKA has a significant learning curve in clinical practice. A surgeon can reach the planned limb alignment with increased accuracy over time (110-cases). Progressive robotic learning and associated operative time efficiency can lead to significantly lower opioid consumption in patients undergoing TKA.

Robotic-Arm Assisted Total Knee Arthroplasty Demonstrated Greater Accuracy and Precision to Plan Compared with Manual Techniques

2018 ◽  
Vol 32 (03) ◽  
pp. 239-250 ◽  
Author(s):  
Emily Hampp ◽  
Morad Chughtai ◽  
Laura Scholl ◽  
Nipun Sodhi ◽  
Manoshi Bhowmik-Stoker ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Robotic Arm ◽  
Component Position ◽  
Absolute Deviation ◽  
Positioning Errors ◽  
Implant Positioning ◽  
Accuracy And Precision ◽  
Total Knee ◽  
Left And Right

AbstractThis study determined if robotic-arm assisted total knee arthroplasty (RATKA) allows for more accurate and precise bone cuts and component position to plan compared with manual total knee arthroplasty (MTKA). Specifically, we assessed the following: (1) final bone cuts, (2) final component position, and (3) a potential learning curve for RATKA. On six cadaver specimens (12 knees), a MTKA and RATKA were performed on the left and right knees, respectively. Bone-cut and final-component positioning errors relative to preoperative plans were compared. Median errors and standard deviations (SDs) in the sagittal, coronal, and axial planes were compared. Median values of the absolute deviation from plan defined the accuracy to plan. SDs described the precision to plan. RATKA bone cuts were as or more accurate to plan based on nominal median values in 11 out of 12 measurements. RATKA bone cuts were more precise to plan in 8 out of 12 measurements (p ≤ 0.05). RATKA final component positions were as or more accurate to plan based on median values in five out of five measurements. RATKA final component positions were more precise to plan in four out of five measurements (p ≤ 0.05). Stacked error results from all cuts and implant positions for each specimen in procedural order showed that RATKA error was less than MTKA error. Although this study analyzed a small number of cadaver specimens, there were clear differences that separated these two groups. When compared with MTKA, RATKA demonstrated more accurate and precise bone cuts and implant positioning to plan.

scholarly journals Thermographic Assessment of Reperfusion Profile Following Using a Tourniquet in Total Knee Arthroplasty: A Prospective Observational Study

2021 ◽  
Vol Volume 14 ◽  
pp. 133-139
Author(s):  
Mohammed Alisi ◽  
Jihad Al-Ajlouni‎ ◽  
Mohammed Kareem Ibsais‎ ◽  
Zeinab Obeid‎ ◽  
Yazan Hammad‎ ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Observational Study ◽  
Knee Arthroplasty ◽  
Prospective Observational Study ◽  
Total Knee
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