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Laser Tissue Welding - Distal Pancreatectomy Sealing Study (LTW)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03147768
Recruitment Status : Recruiting
First Posted : May 10, 2017
Last Update Posted : August 14, 2019
National Cancer Institute (NCI)
CHI St. Luke's Health, Texas
Information provided by (Responsible Party):
Laser Tissue Welding, Inc.

Tracking Information
First Submitted Date  ICMJE May 8, 2017
First Posted Date  ICMJE May 10, 2017
Last Update Posted Date August 14, 2019
Actual Study Start Date  ICMJE January 1, 2018
Estimated Primary Completion Date July 1, 2020   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: May 8, 2017)
PRIMARY EFFICACY AS A SEALANT: Intra-operative blood loss [ Time Frame: Intra-operative ]
Operative blood loss is defined by: volume of blood in the suction bottles, volume of blood clots, and weight of surgical towels before and after use. Clinical drop in hemoglobin (1 gm% = 300 ml) without hemodilution. Correlates with intra-operative blood transfusions. Correlates with post-operative blood transfusions.
Original Primary Outcome Measures  ICMJE Same as current
Change History Complete list of historical versions of study NCT03147768 on Archive Site
Current Secondary Outcome Measures  ICMJE
 (submitted: May 8, 2017)
  • SECONDARY SAFETY: Post-operative blood loss requiring return to the operating room [ Time Frame: 30 days ]
    Secondary hemorrhage or intra-abdominal hematoma requiring surgical evacuation
  • SECONDARY SAFETY: Prolonged post-operative pancreatic leakage [ Time Frame: 30 days ]
    Pancreatic juice leakage is measured in drainage bottles (ml/day) following surgery till a drain placed during the operation is removed before patient discharge. Accumulation of fluids around the pancreas will be assessed with U/S and CT scan at the mentioned time points.
  • SECONDARY SAFETY: Surgical space abscess [ Time Frame: 30 days ]
    Secondary infection, intra-abdominal abscess formation requiring surgical evacuation
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures
 (submitted: May 8, 2017)
  • SECONDARY EFFICACY: Total operating time (minutes) [ Time Frame: Intra-operative assessment ]
    Duration and Cost Metric
  • SECONDARY EFFICACY: Pancreas clamp time (minutes) [ Time Frame: Intra-operative assessment ]
    Duration Metric: Assesses organ ischemia and handling, and will correlate with compromised function (rise in serum Amylase and Lipase) (assesses organ ischemia and will correlate with compromised function)
  • SECONDARY EFFICACY: Laser tissue welding time or time to hemostasis (Duration Metric) [ Time Frame: Intra-operative assessment ]
    Duration and Cost Metric
  • SECONDARY EFFICACY: Length of ICU stays (Duration and cost Metric ) [ Time Frame: 30 days ]
    Duration and Cost Metric
  • SECONDARY EFFICACY: Total hospital stay (Duration and cost Metric ) [ Time Frame: 3 months ]
    Duration and Cost Metric
Original Other Pre-specified Outcome Measures Same as current
Descriptive Information
Brief Title  ICMJE Laser Tissue Welding - Distal Pancreatectomy Sealing Study
Official Title  ICMJE Phase I Feasibility Trial To Study The Safety Of Sealing Resected Pancreatic Surfaces After Partial Distal Pancreatectomy Using Laser Tissue Welding
Brief Summary

The laser tissue welding device is intended for use in patients requiring sealing of the pancreas after partial pancreatectomy, and including those patients who are fully heparinized or have hemodilutional coagulation failure.

The hypothesis is that the laser tissue welding device is safe and effective in sealing the pancreas, thereby decreasing the blood loss (operative and post-operative), and pancreatic juice leakage for patients when the Laser Tissue Welding device is used after pancreatic resection.

Detailed Description


In the United States, pancreatic cancer is the fourth leading cause of cancer-related death in both men and women and will be the second leading case by 2030. Pancreatoduodenectomy (Whipple procedure) and distal partial pancreatectomy is used to treat pancreatic tumors, and these procedures are associated with a high rate of morbidity due to pancreatic fistulae.

As per the Surveillance, Epidemiology and End Results (SEER) Program: It is estimated that 41,609 men and women (21,370 men and 21,770 women) will be diagnosed with and 38,460 men and women will die of cancer of the pancreas in 2013. The five-year survival is dismal, 24.1% for localized malignancy, and drops to 6% if there is regional spread. There are 45,220 new cases in 2013 and 38,460 deaths.

Distal Pancreatectomy may be indicated for malignant exocrine tumors of the body and tail of pancreas (62%), insulinomas, chronic pancreatitis (12%), pancreatic pseudocysts, non pancreatic tumors (23%) and injury due to trauma.

Due to heighten awareness and preventative care, there has been an increase in detection of incidental small pancreatic mass cases due to widespread use of abdominal cross sectional imaging and thus an increase in the amount of pancreatic surgery performed. This is the stage when curative resections may be possible.

  1. Surgical removal of the tumor is the only chance of a cure at T1A.
  2. All pancreatic tumors at any stage require bulk reduction by a surgical procedure.

For patients undergoing distal pancreatectomy, pancreatic fistulas occurred post-operatively in 31% of patients. Over the long-term Kazanjian et al analyzed, 182 patients from 1996-2005 who underwent Pancreatoduodenectomy to treat ductal adenocarcinoma, concluded that the principal factor influencing long-term survival was operative blood loss. Pancreatic fistula is a main cause of postoperative morbidity, and is associated with numerous further complications, such as intra-abdominal abscesses, wound infection, sepsis, electrolyte imbalance, malabsorption, and hemorrhage, and with a dramatically increase in healthcare resource utilization.

The current state-of-art pancreatic surgical resections have an unacceptable pancreatic leak rate of 30-50%. This is because there are no FDA cleared or approved sealants or devices found to be safe or effective for sealing this organ. The current standard of care is anything but standard because of the use of off-label devices and sealants.

  • Endo GIA Staplers: 510 (k) k111825 Cleared on basis of "literature review" without animal or human safety or efficacy data.
  • Gore SeamGuard staple/suture reinforcement material 510 (k) k043056 Synthetic bio absorbable glycolide and trimethylene carbonate copolymer. Cleared on basis of in-vivo studies done "without performance standards" under section 514.
  • Surgical Sealants: All used "off label": None are FDA cleared or approved for pancreatic surgery. These are Floseal, TachoSil, Tisseel, BioGlue, and CoSeal.

Jörg Kleeff et al reviewed the factors for surgical failure of distal pancreatectomy in 302 consecutive patients from 1993 to 2006 using four different surgical closures (gut anastomosis, seromuscular patch, suture and stapling device). Although distal pancreatectomy is less moribund as compared to Whipple procedure, morbidity was 32-52%, pancreatic fistulas occurred in 20-33% and mortality in 2% of cases. Pancreatic fistulas contributed significantly to morbidity, sepsis, length of stay and overall costs. Stapler closure of the pancreatic remnant is associated with a significantly higher fistula rate.

Laser Tissue Welding is the first combination (laser and biologic) class III surgical device intended to join and seal tissues accurately and instantly. The treatment process uses thermal energy created when a laser excites photosensitive dye molecules, to coagulate the protein albumin which transforms from a liquid to a solid instantly. Laser tissue welding creates a non-compressive, non-ablative sealing of tissues with microscopic thermal damage. This combination of a laser with albumin biologics stops bleeding and fluid leaks in nanoseconds without using sutures, hemostatic clotting factors (platelets/thrombin/fibrin), thermal or cryoablation.

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 1
Study Design  ICMJE Intervention Model: Single Group Assignment
Intervention Model Description:
Open Label Combination Product (Laser + Biologic + Drug) regulated as a device
Masking: None (Open Label)
Primary Purpose: Device Feasibility
Condition  ICMJE
  • Pancreatic Tumor, Benign
  • Pancreatic Neoplasms
  • Pancreatic Adenocarcinoma
  • Pancreatic Pseudocyst
  • Pancreatic Neuroendocrine Tumor
  • Pancreas; Insulinoma
  • Pancreatic Cyst
  • Pancreatic Teratoma
  • Pancreatic Polypeptide Tumor
  • Pancreatic Vipoma
  • Pancreatic Cystadenoma
  • Pancreas Injury
  • Pancreatic Gastrinoma
  • Pancreatic Glucagonoma
Intervention  ICMJE Device: Distal Pancreatectomy Sealing Using LTW
The device's intended use is to seal the pancreatic surface using a laser to weld human albumin based biomaterials after surgical removal of pancreatic tumors during a partial pancreatectomy.
Study Arms  ICMJE Experimental: Distal Pancreatectomy Sealing using LTW
At the completion of pancreatic resection, the cut surface of the pancreas is covered with two layers of Albu-Green solder and one layer of D-Albumin lamina, all welded with the laser. The 60 Watt custom 810nm diode laser, is set to deliver continuous energy with laser irradiation power of approximately 150 W/cm2 with a Fluence of 90 J/cm2. During soldering the tip of the custom hand piece with top hat beam profile is held 1-2 cm from the wound surface to generate a 5mm spot size. Albu-Green Solder is observed to convert from a liquid green state to a solid white crust when the laser is activated indicating the completion of welding and providing a visual cue to the operator. The amount of Albu-Green solder and size of the denatured albumin lamina used is documented. The total laser tissue welding time for the three layers and the laser tissue welding time in seconds per cm2 is documented.
Intervention: Device: Distal Pancreatectomy Sealing Using LTW
Publications *

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Recruiting
Estimated Enrollment  ICMJE
 (submitted: May 8, 2017)
Original Estimated Enrollment  ICMJE Same as current
Estimated Study Completion Date  ICMJE August 1, 2020
Estimated Primary Completion Date July 1, 2020   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

Eligible participants will be 18 years and older of both genders.

  1. T1a (≤ 4 cm, as measured by the maximal dimension by CT or MRI). Final determination of disease stage is made during the operation by the investigator. All resectable cystic, benign, primary or secondary malignant tumors.
  2. Serum creatinine: ≤ 2.5 mg/dL
  3. Glomerular filtration rate greater than ≥ 50 ml/min/m2
  4. Platelet count ≥ 50,000/mm3
  5. Prothrombin time < 18 seconds
  6. PTT not >1.5 times control (except for therapeutically; anticoagulated nonrelated medical conditions [e.g., atrial fibrillation]);
  7. Serum albumin levels > 3g/dL (Normal range 3.5 to 5 g/dL)

Exclusion Criteria:

  1. Age younger than 18 years' old
  2. Severe uncorrected hypertension (> 180 systolic and >110 diastolic)
  3. Uncorrectable coagulopathies (on Plavix, Aspirin or Lovanox)
  4. Pregnancy
  5. Females who are breast feeding who do not switch the infant to formula prior to surgery
  6. Active urinary tract infection
  7. T1b (>4 cm) lesion and above
  8. Systemic or local infection.
  9. Subject has known allergy or intolerance to iodine or human serum albumin.
  10. Recent febrile illness that precludes or delays participation preoperatively.
  11. Treatment with another investigational drug or other intervention during the study and follow-up period.
  12. Anything that would place the individual at increased risk or preclude the individual's full compliance with or completion of the study.
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE
Contact: OMAR BARAKAT, M.D. 713-798-2262
Contact: BRIDGET SOLIS 713-798-1037
Listed Location Countries  ICMJE United States
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT03147768
Other Study ID Numbers  ICMJE Phase I - LTW Pancreas Sealing
R44CA203052 ( U.S. NIH Grant/Contract )
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: Yes
Device Product Not Approved or Cleared by U.S. FDA: Yes
IPD Sharing Statement  ICMJE
Plan to Share IPD: No
Responsible Party Laser Tissue Welding, Inc.
Study Sponsor  ICMJE Laser Tissue Welding, Inc.
Collaborators  ICMJE
  • National Cancer Institute (NCI)
  • CHI St. Luke's Health, Texas
Investigators  ICMJE
Principal Investigator: OMAR BARAKAT, M.D Baylor CHI St. Luke's Medical Center, Houston, Texas
Study Director: STEPHEN HAROLD, M.D.; MPH; CCRC Baylor CHI St. Luke's Medical Center, Houston, Texas
PRS Account Laser Tissue Welding, Inc.
Verification Date August 2019

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP