Improving Care and Reducing Length of Stay in Patients Undergoing Total Knee Replacement

DVT Mechanical Prophylaxis

The orthopedic surgery service was concerned about adherence with stationary sequential compressive devices for mechanical thromboembolic prophylaxis. Patients had to remove them for PT, ambulation in the halls, and visiting the restroom, and then nurses had to replace them. A literature review examined a mobile compressive device that could be maintained during ambulation, and a demonstration for the orthopedic surgery service was arranged. The orthopedic service decided to change to the newer device, and the mobile compression device was presented to the PVAHCS Therapeutics Committee. Subsequently the new device was implemented after the appropriate in-service of the various clinic, PT, ward, surgery, preoperative, and postoperative personnel.¹¹ The device was initiated in the holding area prior to surgery, continued throughout the hospitalization, and taken home by the patient for 2 weeks of use following surgery. Patients were instructed to return the device to clinic at their 2-week follow-up appointment.

Infection Control

A dilute betadine lavage was instituted for each surgical case, using the pulsatile lavage followed by a lactated Ringer solution rinse prior to TKR implantation. Additionally, the wound was lavaged prior to closure with this dilute betadine solution.¹²

Pain Control

Immediately before surgery, patients received oral morphine sulfate and celecoxib. A local 2% lidocaine with epinephrine injection was used at the surgical incision and joint after the skin prep and immediately prior to the skin incision. Patients received a mixture of ropivicaine .5%/20 mL, morphine sulfate 10 mg, and toradol 30 mg at the capsular region prior to implantation of the total knee prosthesis. At the end of the procedure, an additional 20 mL of 2% lidocaine was injected into the joint once the capsule was closed. This improved postoperative pain, decreased postoperative opioid dosing, and allowed for earlier ambulation with PT.¹³

PostOperative Processes

Deep Vein Thrombosis (DVT) Chemoprophylaxis

Once the chest physician guidelines-approved stand-alone mobile compressive devices was implemented, orthopedic surgery service revisited the chemoprophylaxis for routine low-risk patients. Use of subcutaneously daily injections of 2.5 mg fondiparinux was switched to 81 mg enteric-coated aspirin administered orally twice daily. The authors believe this further reduced the postoperative bleeding and transfusion risks. There was not an increase in DVT or pulmonary embolism complications.^14,15

Physical Therapy

Partnering with PT, a 2-day LOS protocol was established. Patients were introduced to this protocol in a preoperative PT teaching class, and it was reinforced during the hospital stay. Patients who had earlier cases in the day were seen by PT the day of surgery when staffing and scheduling permitted. Early ambulation contributed significantly to earlier discharge for patients.¹⁶ Early ambulation also has been shown to decrease thromboembolic complications in orthopedic total joint patients.

Pain and Nausea Management

Parenteral narcotics were avoided, and oral narcotics were implemented with a graduated dosing based on a 10-point pain scale. For most patients, this was adequate and avoided the nausea frequently seen with the injectable narcotics.

Use of a postoperative cooling device that circulated cool water through a pad over the patient’s knee was instituted to assist with pain control. The patient received instruction on this device at the preoperative education sessions and was given the device to continue at home postdischarge.

Hospitalist Comanagement

Comanagement of orthopedic patients with hospitalists has become a standard practice nationally. The orthopedic surgery service works closely with the hospitalist team who see each total joint patient on postoperative admission to the ward. The orthopedic team handles all aspects of PT, wound management, pain control, and DVT prophylaxis. The hospitalist focuses on the remainder of comorbid conditions such as DM, chronic obstructive pulmonary disease, and underlying cardiac conditions.

The American Society of Anesthesiologists (ASA) average score was 2.8 for these procedures. Despite comprehensive preoperative screening, older patients with more comorbidities (higher ASA score) are more prone to emerging complications.¹⁷ Integration of the hospitalist team into the care of every orthopedic total joint patient facilitates prompt recognition and mitigation of these complications as they occur, directly reducing overall severity and LOS and allowing safe recovery from the surgical procedure.^18,19

Conclusion

At the start of this system improvement, the previous 12-month data showed 164 knee replacements with a 4.9-day VA national LOS and 3.5- day PVAHCS LOS. At the end of the 12-month system improvement, the VA national LOS for TKR was 4.8 days, and at PVAHCS it was 2.8 days.

The 30-day readmission rate was 8.4% nationally and 7.9% at PVAHCS. After the system improvements, the national 30-day readmission rate was 7.1%, while the PVAHCS rate dropped to less than half the national rate: 3.4%.

It is important to note, that the improvements in the aforementioned multiple processes could not have been possible without a dedicated effort from the multiple stakeholders involved. Hospitalists, primary care, PT, pharmacy, operating room staff, anesthesia, preprocedure staff, floor nurses, the Commodities and Therapeutics Committee, and administration all partnered with the orthopedic surgery service to produce the improvements in LOS and corresponding reduction in 30-day readmissions.

These data suggest that there does not need to be an inherent tradeoff between LOS and 30-day readmissions. Rather, both measures can be managed independently to produce improvements across the service. A team approach to process improvement can allow for increased efficiency while providing safer care for patients.