Title

Efficacy and Safety of a Collagen Bupivacaine Implant in Women Following Abdominal Hysterectomy
A Phase II, Single-dose, Blinded, Prospective Study to Investigate the Efficacy and Safety of the CollaRx® Bupivacaine Implant in Women Following Abdominal Hysterectomy or Other Nonlaparoscopic Benign Gynecological Procedure
  • Phase

    Phase 2
  • Study Type

    Interventional
  • Intervention/Treatment

    levobupivacaine ...
  • Study Participants

    54
The purpose of this study is to determine whether the CollaRx Bupivacaine implant is safe and effective in reducing the amount of narcotic pain medication needed to control pain during the first 24 hours after abdominal hysterectomy surgery.
Hysterectomy is the second most common surgery among women in the United States (US). According to the National Center for Health Statistics, there were 617,000 hysterectomies performed in the US in 2004. Effective postoperative pain management after hysterectomy is important in ensuring that surgical subjects have a smooth and successful recovery after their operation. Morphine and other narcotic pain medications are often used to help control pain after hysterectomy, but the large quantities required can lead to fatigue, nausea and vomiting, as well as the inability to walk around much because of drowsiness. Reducing narcotic pain medication use can reduce these negative side effects.

Bupivacaine is a local anesthetic (pain medicine) that has an established safety profile. Collagen is a protein that is found in all mammals. The CollaRx Bupivacaine implant is a thin flat sponge made out of collagen that comes from cow tendons and contains bupivacaine. When inserted into a surgical site, the collagen breaks down and bupivacaine is released at the site but very little is absorbed into the blood stream. The high levels of bupivacaine at the surgical site may result in less pain for several days after surgery.

This study will compare the amount of narcotic pain medication required after surgery in patients who receive the CollaRx Bupivacaine implant, a plain collagen implant or no implant at all.
Study Started
Dec 27
2007
Primary Completion
Sep 05
2008
Study Completion
Sep 05
2008
Results Posted
Jan 12
2021
Last Update
Jul 23
2021

Drug Bupivacaine Collagen Sponge (CollaRx®)

The bupivacaine sponge contains 70 mg Type I collagen and 50 mg bupivacaine hydrochloride. A total of 3 sponges will be implanted during surgery; one sponge divided between areas in the vault, one sponge divided and placed across the incision in the peritoneum and the final sponge divided and placed between the sheath and skin around the incision.

  • Other names: CollRx Bupivacaine Implant

Drug placebo

The placebo sponge contains 70 mg Type I collagen. A total of 3 sponges will be implanted during surgery; one sponge divided between areas in the vault, one sponge divided and placed across the incision in the peritoneum and the final sponge divided and placed between the sheath and skin around the incision.

1 Experimental

A total of three 5 × 5-cm bupivacaine sponges implanted at specified layers in the wound prior to wound closure

2 Placebo Comparator

A total of three 5 × 5-cm collagen sponges implanted at specified layers in the wound prior to wound closure

3 No Intervention

The patient will recieve the standard of care, but no implant during surgery

Criteria

Inclusion Criteria:

Have a body mass index (BMI) > 19 and < 40 kg/m2

Had planned an elective total abdominal hysterectomy for reasons other than malignancies to be performed according to standard surgical technique using a standard incision and under general anesthesia with the following caveats:

Laparoscopic procedures or supraumbilical or Maylard incisions will not be allowed
A nonlaparoscopic incision for benign non-hysterectomy gynecological procedures (such as myomectomy or adnexal surgery) is acceptable if the surgical indication is not to treat pelvic pain
No concomitant vaginal procedures are allowed. An abdominal urethropexy and an incidental appendectomy will be allowed
Have a risk classification of I, II or III according to the American Society of Anesthesiologists (ASA)
Have a negative pregnancy test
Be free of other physical or mental conditions which may confound assessment of postoperative pain
Have the ability to read, understand and comply with the study procedures and the use of the pain scales; is capable of operating a patient-controlled analgesia (PCA) device; and is able to communicate meaningfully with the study staff
Voluntarily sign and date an informed consent form (ICF), prior to the conduct of any study-specific procedures
Able to fluently speak and understand English and be able to provide meaningful written informed consent for the study

Exclusion Criteria:

Known hypersensitivity to any active or inactive ingredient of the test articles
Presence of clinically significant cardiac arrhythmias or atrioventricular (AV) conduction disorders
Concomitant use of other amide local anesthetics
Concomitant use of antiarrhythmics
Concomitant use of propanolol
Concomitant use of strong/moderate CYP3A4 inhibitors or inducers
Has used aspirin or aspirin-containing products within 7 days of surgery.
Previous major surgery in the last 3 months
Requires any additional surgical procedures during the same hospitalization (except as noted)
Received neuraxial (spinal or epidural) opioid analgesics either prior to or during surgery
Received local anesthetic infiltration of the surgical wound prior to, during or immediately after closure
Is scheduled to receive local anesthetics via an indwelling catheter after surgery
Underwent additional procedures during surgery, which may increase the visceral pain
Has known or suspected history of alcohol or drug abuse or misuse or evidence for tolerance or physical dependency on opioids analgesics or sedative-hypnotic medications
Uses opioids or tramadol daily for > 7 days prior to test article administration
Has impaired liver function
Has any clinically significant unstable condition that could compromise the patient's welfare
Is at risk for infection or slow wound healing
Has a chronic painful condition that might confound the assessment of pain associated with the sugery
Has taken pain medication that could confound the analgesic responses the day of surgery
Has been treated within 2 weeks of surgery with agents that could affect the analgesic response
Has been treated with monoamine oxidase inhibitors (MAOIs) or MAOIs have been stopped fewer than 10 days prior to surgery
Has been treated with corticosteroids or whose treatment with these has been stopped < 7 days prior surgery (inhaled corticosteroids are acceptable)
Has participated in a clinical trial in the previous 30 days
Has been hemodynamically unstable at any point in the previous 4 weeks or becomes hemodynamically unstable during surgery
Required blood transfusion in the previous month, except as related to uterine bleeding caused by uterine fibroids.
Has hemoglobin levels < 10 g/dL or < 8 g/dL for patients with an anemia secondary to heavy uterine bleeding caused by uterine fibroids.
Has platelet count < 100,000/mm
Unreliable or incapable of complying with the protocol

Summary

Bupivacaine Sponges

Collagen Sponges

Standard of Care no Implant

All Events

Event Type Organ System Event Term Bupivacaine Sponges Collagen Sponges Standard of Care no Implant

Total Use of Opioid Rescue Analgesia

Total use of opioid rescue analgesia (mg equivalent) -higher score means more analgesia was needed and worse outcome

Bupivacaine Sponges

53.65
mg morphine equivalents (Mean)
Standard Deviation: 32.78

Collagen Sponges

66.56
mg morphine equivalents (Mean)
Standard Deviation: 47.53

Standard of Care no Implant

53.73
mg morphine equivalents (Mean)
Standard Deviation: 47.71

Total Use of Opioid Rescue Analgesia

Total use of opioid rescue analgesia (mg equivalent) -higher score means more analgesia was needed and worse outcome

Bupivacaine Sponges

67.78
mg morphine equivalents (Mean)
Standard Deviation: 37.195

Collagen Sponges

80.87
mg morphine equivalents (Mean)
Standard Deviation: 51.085

Standard of Care no Implant

66.03
mg morphine equivalents (Mean)
Standard Deviation: 32.41

Total Use of Opioid Rescue Analgesia

Total use of opioid rescue analgesia (mg equivalent) -higher score means more analgesia was needed and worse outcome

Bupivacaine Sponges

78.13
mg morphine equivalents (Mean)
Standard Deviation: 40.304

Collagen Sponges

88.6
mg morphine equivalents (Mean)
Standard Deviation: 55.84

Standard of Care no Implant

73.28
mg morphine equivalents (Mean)
Standard Deviation: 36.308

Pain Intensity Rating on a Visual Analog Scale (at Rest)

Pain intensity rating on a Visual Analog Scale (at rest). Lowest score possible is "0" with the highest score possible being "100". Higher number means more pain reported.

Bupivacaine Sponges

Hour 1.0

58.5
score on a scale (Mean)
Standard Deviation: 33.59

Hour 12

36.1
score on a scale (Mean)
Standard Deviation: 24.79

Hour 1.5

60.1
score on a scale (Mean)
Standard Deviation: 29.88

Hour 18

41.6
score on a scale (Mean)
Standard Deviation: 22.45

Hour 2.0

54.2
score on a scale (Mean)
Standard Deviation: 23.92

Hour 24

33.3
score on a scale (Mean)
Standard Deviation: 24.71

Hour 3.0

47.0
score on a scale (Mean)
Standard Deviation: 28.27

Hour 36

32.6
score on a scale (Mean)
Standard Deviation: 23.27

Hour 48

26.4
score on a scale (Mean)
Standard Deviation: 20.41

Hour 6.0

38.5
score on a scale (Mean)
Standard Deviation: 24.47

Hour 72

18.6
score on a scale (Mean)
Standard Deviation: 16.03

Hour 9.0

36.2
score on a scale (Mean)
Standard Deviation: 25.22

Collagen Sponges

Hour 1.0

63.0
score on a scale (Mean)
Standard Deviation: 30.08

Hour 12

32.4
score on a scale (Mean)
Standard Deviation: 26.40

Hour 1.5

61.3
score on a scale (Mean)
Standard Deviation: 31.48

Hour 18

29.8
score on a scale (Mean)
Standard Deviation: 29.78

Hour 2.0

50.3
score on a scale (Mean)
Standard Deviation: 28.93

Hour 24

32.0
score on a scale (Mean)
Standard Deviation: 31.07

Hour 3.0

46.2
score on a scale (Mean)
Standard Deviation: 31.80

Hour 36

18.7
score on a scale (Mean)
Standard Deviation: 18.40

Hour 48

26.7
score on a scale (Mean)
Standard Deviation: 26.91

Hour 6.0

43.3
score on a scale (Mean)
Standard Deviation: 32.49

Hour 72

14.7
score on a scale (Mean)
Standard Deviation: 17.43

Hour 9.0

39.9
score on a scale (Mean)
Standard Deviation: 31.49

Standard of Care no Implant

Hour 1.0

66.5
score on a scale (Mean)
Standard Deviation: 30.29

Hour 12

38.4
score on a scale (Mean)
Standard Deviation: 32.21

Hour 1.5

61.3
score on a scale (Mean)
Standard Deviation: 32.68

Hour 18

24.0
score on a scale (Mean)
Standard Deviation: 24.64

Hour 2.0

61.9
score on a scale (Mean)
Standard Deviation: 28.39

Hour 24

41.7
score on a scale (Mean)
Standard Deviation: 39.29

Hour 3.0

46.4
score on a scale (Mean)
Standard Deviation: 31.57

Hour 36

41.8
score on a scale (Mean)
Standard Deviation: 39.03

Hour 48

22.2
score on a scale (Mean)
Standard Deviation: 29.41

Hour 6.0

34.7
score on a scale (Mean)
Standard Deviation: 27.17

Hour 72

27.7
score on a scale (Mean)
Standard Deviation: 29.57

Hour 9.0

44.0
score on a scale (Mean)
Standard Deviation: 31.07

Time to First Use of Opioid Rescue Analgesia

Time to first use of opioid rescue analgesia - lower number means worse outcome

Bupivacaine Sponges

0.9
Time (Hours) (Median)
95% Confidence Interval: 0.8 to 1.3

Collagen Sponges

0.9
Time (Hours) (Median)
95% Confidence Interval: 0.6 to 1.1

Standard of Care no Implant

0.4
Time (Hours) (Median)
95% Confidence Interval: 0.2 to 1.0

Pain Intensity Rating on a Visual Analog Scale (After Cough)

Pain intensity rating on a Visual Analog Scale (after cough). Lowest score possible is "0" with the highest score possible being "100". Higher number means more pain reported.

Bupivacaine Sponges

Hour 1.0

68.2
score on a scale (Mean)
Standard Deviation: 32.96

Hour 12

52.5
score on a scale (Mean)
Standard Deviation: 24.56

Hour 1.5

68.2
score on a scale (Mean)
Standard Deviation: 29.49

Hour 18

55.8
score on a scale (Mean)
Standard Deviation: 25.40

Hour 2.0

66.0
score on a scale (Mean)
Standard Deviation: 24.96

Hour 24

46.8
score on a scale (Mean)
Standard Deviation: 26.65

Hour 3.0

53.9
score on a scale (Mean)
Standard Deviation: 29.02

Hour 36

51.2
score on a scale (Mean)
Standard Deviation: 28.06

Hour 48

40.7
score on a scale (Mean)
Standard Deviation: 29.30

Hour 6.0

48.3
score on a scale (Mean)
Standard Deviation: 27.73

Hour 72

28.0
score on a scale (Mean)
Standard Deviation: 25.97

Hour 9.0

52.8
score on a scale (Mean)
Standard Deviation: 27.69

Collagen Sponges

Hour 1.0

73.8
score on a scale (Mean)
Standard Deviation: 33.55

Hour 12

49.1
score on a scale (Mean)
Standard Deviation: 26.22

Hour 1.5

67.3
score on a scale (Mean)
Standard Deviation: 34.05

Hour 18

46.7
score on a scale (Mean)
Standard Deviation: 28.79

Hour 2.0

61.3
score on a scale (Mean)
Standard Deviation: 32.17

Hour 24

52.0
score on a scale (Mean)
Standard Deviation: 32.14

Hour 3.0

58.0
score on a scale (Mean)
Standard Deviation: 32.82

Hour 36

32.0
score on a scale (Mean)
Standard Deviation: 23.81

Hour 48

46.8
score on a scale (Mean)
Standard Deviation: 27.24

Hour 6.0

64.7
score on a scale (Mean)
Standard Deviation: 31.63

Hour 72

28.6
score on a scale (Mean)
Standard Deviation: 27.94

Hour 9.0

49.8
score on a scale (Mean)
Standard Deviation: 29.12

Standard of Care no Implant

Hour 1.0

72.6
score on a scale (Mean)
Standard Deviation: 31.01

Hour 12

55.0
score on a scale (Mean)
Standard Deviation: 27.19

Hour 1.5

73.8
score on a scale (Mean)
Standard Deviation: 27.44

Hour 18

45.3
score on a scale (Mean)
Standard Deviation: 28.08

Hour 2.0

72.9
score on a scale (Mean)
Standard Deviation: 26.08

Hour 24

59.1
score on a scale (Mean)
Standard Deviation: 30.58

Hour 3.0

59.0
score on a scale (Mean)
Standard Deviation: 30.29

Hour 36

58.2
score on a scale (Mean)
Standard Deviation: 34.69

Hour 48

38.0
score on a scale (Mean)
Standard Deviation: 27.80

Hour 6.0

53.2
score on a scale (Mean)
Standard Deviation: 29.86

Hour 72

40.1
score on a scale (Mean)
Standard Deviation: 30.85

Hour 9.0

63.1
score on a scale (Mean)
Standard Deviation: 22.64

Pain Intensity Rating on a 4-point Likert Scale (at Rest)

For the 4-point categorical scale assessment, patients measured their pain intensity at rest using a numerical scale where: 0 = "none," 1 = "mild," 2 = "moderate" and 3 = "severe."

Bupivacaine Sponges

Hour 0.5

1.8
score on a scale (Mean)
Standard Deviation: 1.00

Hour 1.0

2.0
score on a scale (Mean)
Standard Deviation: 0.95

Hour 12

1.4
score on a scale (Mean)
Standard Deviation: 0.75

Hour 1.5

2.0
score on a scale (Mean)
Standard Deviation: 0.79

Hour 18

1.5
score on a scale (Mean)
Standard Deviation: 0.51

Hour 2.0

2.0
score on a scale (Mean)
Standard Deviation: 0.62

Hour 24

1.3
score on a scale (Mean)
Standard Deviation: 0.75

Hour 3.0

1.7
score on a scale (Mean)
Standard Deviation: 0.71

Hour 36

1.3
score on a scale (Mean)
Standard Deviation: 0.82

Hour 48

1.1
score on a scale (Mean)
Standard Deviation: 0.63

Hour 6.0

1.5
score on a scale (Mean)
Standard Deviation: 0.64

Hour 72

0.9
score on a scale (Mean)
Standard Deviation: 0.69

Hour 9.0

1.4
score on a scale (Mean)
Standard Deviation: 0.63

Collagen Sponges

Hour 0.5

2.0
score on a scale (Mean)
Standard Deviation: 1.00

Hour 1.0

2.2
score on a scale (Mean)
Standard Deviation: 0.69

Hour 12

1.1
score on a scale (Mean)
Standard Deviation: 0.64

Hour 1.5

2.0
score on a scale (Mean)
Standard Deviation: 0.88

Hour 18

1.1
score on a scale (Mean)
Standard Deviation: 0.74

Hour 2.0

1.7
score on a scale (Mean)
Standard Deviation: 0.70

Hour 24

1.1
score on a scale (Mean)
Standard Deviation: 0.70

Hour 3.0

1.6
score on a scale (Mean)
Standard Deviation: 0.74

Hour 36

0.8
score on a scale (Mean)
Standard Deviation: 0.43

Hour 48

0.9
score on a scale (Mean)
Standard Deviation: 0.70

Hour 6.0

1.3
score on a scale (Mean)
Standard Deviation: 0.96

Hour 72

0.6
score on a scale (Mean)
Standard Deviation: 0.63

Hour 9.0

1.5
score on a scale (Mean)
Standard Deviation: 0.83

Standard of Care no Implant

Hour 0.5

2.2
score on a scale (Mean)
Standard Deviation: 1.03

Hour 1.0

2.2
score on a scale (Mean)
Standard Deviation: 0.79

Hour 12

1.7
score on a scale (Mean)
Standard Deviation: 0.76

Hour 1.5

2.1
score on a scale (Mean)
Standard Deviation: 0.83

Hour 18

1.4
score on a scale (Mean)
Standard Deviation: 0.79

Hour 2.0

2.0
score on a scale (Mean)
Standard Deviation: 0.77

Hour 24

1.5
score on a scale (Mean)
Standard Deviation: 0.82

Hour 3.0

1.9
score on a scale (Mean)
Standard Deviation: 0.88

Hour 36

1.4
score on a scale (Mean)
Standard Deviation: 0.52

Hour 48

0.9
score on a scale (Mean)
Standard Deviation: 0.83

Hour 6.0

1.6
score on a scale (Mean)
Standard Deviation: 0.52

Hour 72

1.1
score on a scale (Mean)
Standard Deviation: 0.70

Hour 9.0

1.8
score on a scale (Mean)
Standard Deviation: 0.83

Pain Intensity Rating on a 4-point Likert Scale (After Cough)

For the 4-point categorical scale assessment, patients measured their pain intensity after aggravated movement (cough) using a numerical scale where: 0 = "none," 1 = "mild," 2 = "moderate" and 3 = "severe."

Bupivacaine Sponges

Hour 0.5

2.1
score on a scale (Mean)
Standard Deviation: 1.02

Hour 1.0

2.2
score on a scale (Mean)
Standard Deviation: 0.95

Hour 12

1.9
score on a scale (Mean)
Standard Deviation: 0.91

Hour 1.5

2.2
score on a scale (Mean)
Standard Deviation: 0.83

Hour 18

1.8
score on a scale (Mean)
Standard Deviation: 0.73

Hour 2.0

2.2
score on a scale (Mean)
Standard Deviation: 0.66

Hour 24

1.7
score on a scale (Mean)
Standard Deviation: 0.76

Hour 3.0

2.1
score on a scale (Mean)
Standard Deviation: 0.80

Hour 36

1.8
score on a scale (Mean)
Standard Deviation: 0.87

Hour 48

1.5
score on a scale (Mean)
Standard Deviation: 0.84

Hour 6.0

1.8
score on a scale (Mean)
Standard Deviation: 0.75

Hour 72

1.3
score on a scale (Mean)
Standard Deviation: 0.68

Hour 9.0

1.9
score on a scale (Mean)
Standard Deviation: 0.74

Collagen Sponges

Hour 0.5

2.2
score on a scale (Mean)
Standard Deviation: 0.83

Hour 1.0

2.5
score on a scale (Mean)
Standard Deviation: 0.78

Hour 12

1.8
score on a scale (Mean)
Standard Deviation: 0.69

Hour 1.5

2.2
score on a scale (Mean)
Standard Deviation: 0.80

Hour 18

1.9
score on a scale (Mean)
Standard Deviation: 0.74

Hour 2.0

2.0
score on a scale (Mean)
Standard Deviation: 0.93

Hour 24

1.8
score on a scale (Mean)
Standard Deviation: 0.77

Hour 3.0

2.1
score on a scale (Mean)
Standard Deviation: 0.88

Hour 36

1.4
score on a scale (Mean)
Standard Deviation: 0.76

Hour 48

1.5
score on a scale (Mean)
Standard Deviation: 0.92

Hour 6.0

2.1
score on a scale (Mean)
Standard Deviation: 0.74

Hour 72

1.3
score on a scale (Mean)
Standard Deviation: 0.49

Hour 9.0

2.1
score on a scale (Mean)
Standard Deviation: 0.80

Standard of Care no Implant

Hour 0.5

2.4
score on a scale (Mean)
Standard Deviation: 0.84

Hour 1.0

2.4
score on a scale (Mean)
Standard Deviation: 0.84

Hour 12

2.0
score on a scale (Mean)
Standard Deviation: 0.58

Hour 1.5

2.5
score on a scale (Mean)
Standard Deviation: 0.69

Hour 18

1.7
score on a scale (Mean)
Standard Deviation: 0.76

Hour 2.0

2.3
score on a scale (Mean)
Standard Deviation: 0.79

Hour 24

1.9
score on a scale (Mean)
Standard Deviation: 0.57

Hour 3.0

2.2
score on a scale (Mean)
Standard Deviation: 0.79

Hour 36

1.9
score on a scale (Mean)
Standard Deviation: 0.74

Hour 48

1.5
score on a scale (Mean)
Standard Deviation: 0.69

Hour 6.0

2.1
score on a scale (Mean)
Standard Deviation: 0.57

Hour 72

1.3
score on a scale (Mean)
Standard Deviation: 0.79

Hour 9.0

2.2
score on a scale (Mean)
Standard Deviation: 0.67

Total

54
Participants

Age, Continuous

42.2
years (Mean)
Standard Deviation: 42.5

Race (NIH/OMB)

Sex: Female, Male

Overall Study

Bupivacaine Sponges

Collagen Sponges

Standard of Care no Implant