Clinical trial NCT03770806: Factors Affecting the Speed of Recovery After ACL Reconstruction
Official title: Factors Affecting the Speed of Recovery After Anterior Cruciate Ligament Reconstruction
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Anterior Cruciate Ligament Injury
ACL Injury
ACL - Anterior Cruciate Ligament Rupture
Lead sponsor: University of Washington
Sponsor class: OTHER
First posted: 2018-12-10
Enrollment: 48
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Subjects who choose to have medication alone with no block for their routine care will be in an observational group only with no randomization. Subjects who elect to have a nerve block placed for their routine treatment will be randomized per the research protocol to have the block placed at either the groin or the mid-thigh. Subjects in each study group will perform the same study procedures. This study will follow subjects for the first 6 months of their recovery to observe routine care pain treatments and evaluate whether the methods of pain control determine (a) severity and duration of postoperative pain, (b) the speed of recovery of muscle function, and (c) pain responses and aggressiveness of pursuing physical therapy maneuvers
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to find out how postoperative pain affects recovery after anterior cruciate ligament (ACL) repair. Complete recovery after ACL repair involves healing of tissues at the surgical site, but also recovery of strength of the muscles that control movements at the knee. Some pain is normally experienced after ACL repair; the severity is variable from one individual to another. Pain is usually controlled by intravenous and oral (by mouth) pain medicines. It is also frequently controlled by numbing nerves that supply sensation to the knee joint and surrounding tissues. This procedure is called a nerve block.

The investigators want to determine if standard methods of pain control after surgery affect future pain control, and the ability to exercise and recover muscle strength after surgery. The investigators are also interested in determining what other factors, such as age, gender, anxiety, or coping skills might be predictive of pain severity and speed of recovery. As part of the study, the investigators will record subject's ratings of pain severity, use of painkiller medicines, and muscle bulk measured by standardized tests, at various time intervals in the first 6 months after surgery. The investigators will also ask them to complete two questionnaires,one that enquires about subject's responses to pain in the past (catastrophizing test), and one that measures anxiety they might have about surgery or pain on the day of surgery. The investigators will be studying approximately 180 people who are having ACL repair at University of Washington. Subjects may be involved who are having multiple ligaments repaired including the anterior cruciate ligament

Detailed description: Anterior cruciate ligament (ACL) tears of the knee are frequently repaired by surgically implanting a tendon graft in place of the torn original cruciate ligament. The graft may be taken from the patient having the repair (an autologous graft) or from a cadaver (an allograft). Complete recovery from surgical repair of an anterior cruciate ligament reconstruction requires that the graft becomes firmly engrafted at the site, surrounding tissues are healed and strength is restored in muscles that control movements at the knee. The recovery process typically requires from six months to one year. Pain in the early phase of recovery is typically moderate to severe and may be a major factor determining patient return to normal activity. It may also be a major factor limiting the patient's ability to cooperate with rehabilitation maneuvers.

Traditional methods of treatment for pain include use of opioid pain killers (such as morphine) and/or femoral nerve block at the groin. The potential hazards of opioid pain killers include opioid side effects (nausea, vomiting, constipation, drowsiness, respiratory depression and the potential for developing opioid dependency=addiction). Pain in the early phase of recovery, if severe, can lead to changes in the spinal cord that predispose to amplifying pain sensations, thus intensifying the need for pain killer medicines, a process referred to as "windup" or neuroplasticity. Similarly, the use of opioid pain killers may activate pain amplification systems potentially contributing to persistence of pain and favoring development of chronic pain. For these reasons, there is a belief that early aggressive efforts to treat postoperative pain, and minimize the use of opioid pain killers, can have significant benefits to patients both by improving their comfort level after surgery; facilitating rehabilitation efforts and return to normal activity.

Anesthesiologists at the University of Washington may use pain medicines alone and/or perform a nerve block to help patients undergoing ACL repair with their pain control. Patients are given a choice as to their desired methods of pain control. These options are normally discussed by the regional block team with the patient prior to surgery and the merits of each discussed. Approximately 60-70% of patients typically request the use of nerve blocks in the recovery unit to help control their pain. For those patients who choose a nerve block, the anesthesiologist will choose to perform the nerve block at the level of the groin or the mid thigh. This decision varies by provider and is typically random in nature. Both locations for the nerve block appear to work most of the time and each may have small differences: the speed of onset is typically faster when performed at groin level, while quadriceps muscle function may be less affected when performed at mid thigh. Neither method is known to be superior for this type of surgery. Because patients are non-weight bearing for at least the first 24 hours after surgery and must use crutches for mobilization, the weakening of the quadriceps muscles may be relatively unimportant during that time.

The investigators hypothesize that pain treatment after ACL reconstruction which includes a nerve block in combination with other pain medications will be associated with better pain control immediately after surgery and will minimize the need for patients to use opioid pain killers and experience common opioid- related side effects. A secondary hypothesis is that the effectiveness of pain control, whether by pain medicines, and/or in combination with nerve blocks will determine the patient's ability to perform routine activities of daily living in the acute phase (0-7 days), and subsequently may affect their ability to perform physical therapy maneuvers that are prescribed for their routine care.

STUDY PURPOSE

Aim 1: Determine whether pain reported by patients after surgery is related to the type of pain control utilized - (1) either intravenous and oral pain medication alone, (2) combined with nerve block at the groin, or (3) combined with nerve block at the mid thigh.

Aim 2: Examine whether pain severity affects the ability of patients to perform activities of daily living in the acute phase (recovery index measured at 7 days), and physical therapy maneuvers in the ensuing 6 months after surgery possibly retarding restoration of muscle function in the affected leg.

Aim 3: Determine whether preoperative psychologic tests designed to assess patients' coping skills (Pain Catastrophizing score) and anxiety (Stait anxiety index) predict postoperative pain reported by patients, acute phase recovery scores (recovery index), and rehabilitation endpoints

Eligibility criteria: INCLUSION Criteria:

* Subjects must be age 18-65,
* Subjects must be undergoing ACL repair at UWMC
* Subjects must be between an anesthesia risk category of 1-3
* Subjects must be candidates to have a nerve block if they should choose so.
* Subjects must be free of neurologic disease or coagulation defects
* Subjects must have no allergies to typical medications used during nerve blocks.
* Subjects must be fluent in English, able to read, and understand English readily in person or and/over the phone.

EXCLUSION Criteria:

* Any patients under 18 or over 75
* Patients with a BMI in excess of 40
* Non-English speaking patients
* Patients with allergies to nerve block medications
* Patients with neurological disease or coagulation defects
* Patients not undergoing ACL repair at UWMC
* Patients who are opioid tolerant

Primary outcomes:
measure: Verbal Pain Scores
timeFrame: 30 minutes after block treatment
measure: Verbal Pain Scores
timeFrame: while walking 24 hours after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 48 hours after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 7 days after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 2 weeks after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 4 weeks after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 2 months after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 3 months after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 4 months after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 5 months after block treatment
measure: Verbal Pain Scores
timeFrame: While walking 6 months after block treatment
Secondary outcomes:
measure: Pain Catastrophizing Score
timeFrame: Pre-Operative measure-performed in preoperative holding area immediately before surgery
measure: Abbreviated State Anxiety Score
timeFrame: Pre-Operative Measure-performed in preopertive holding area immediately before surgery
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 4 weeks after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 4 weeks after block treatment
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 2 months after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 2 months after block treatment
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 3 months after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 3 months after block treatment
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 4 months after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 4 months after block treatment
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 5 months after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 5 months after block treatment
measure: Physical Therapy milestones-duration of activity
timeFrame: At physical therapy appointment 6 months after block treatment
measure: Physical Therapy milestones-mobility
timeFrame: At physical therapy appointment 6 months after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 24 hours after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 48 hours after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 7 days after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 2 weeks after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 4 weeks after block treatment
measure: Self-reported Verbal Pain scores correlational analysis
timeFrame: 2 months after block treatment
measure: Self-reported Verbal Pain scores
timeFrame: 3 months after block treatment
measure: Self-reported Verbal Pain scores
timeFrame: 4 months after block treatment
measure: Self-reported Verbal Pain scores
timeFrame: 5 months after block treatment
measure: Self-reported Verbal Pain scores
timeFrame: 6 months after block treatment
Other outcomes:
Locations:
city: Seattle
country: United States
facility: University of Washington Medical Center
state: Washington
Study officials:
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