| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T1 |
0-87 |
Sentence |
denotes |
A pilot study of therapeutic plasma exchange for serious SARS CoV-2 disease (COVID-19): |
| T2 |
88-156 |
Sentence |
denotes |
A structured summary of a randomized controlled trial study protocol |
| T3 |
157-167 |
Sentence |
denotes |
Objectives |
| T4 |
168-364 |
Sentence |
denotes |
To evaluate the safety of therapeutic plasma exchange (TPE) in adult patients with serious/life-threatening COVID-19 requiring intensive care unit (ICU) admission, and associated 28-day mortality. |
| T5 |
365-499 |
Sentence |
denotes |
Serious and life threatening COVID-19 are defined as per published literature (please, refer to the full protocol, Additional file 1). |
| T6 |
500-612 |
Sentence |
denotes |
The rationale is that TPE can remove interleukins-3, 6, 8, 10, interferon-gamma and tumor necrosis factor-alpha. |
| T7 |
613-706 |
Sentence |
denotes |
Thus, it may reduce the cytokine release syndrome associated with fulminant COVID-19 disease. |
| T8 |
707-719 |
Sentence |
denotes |
Trial design |
| T9 |
720-795 |
Sentence |
denotes |
Pilot, interventional, open-label, randomized controlled multicenter trial. |
| T10 |
796-808 |
Sentence |
denotes |
Participants |
| T11 |
809-832 |
Sentence |
denotes |
Inclusion criteria are: |
| T12 |
833-1011 |
Sentence |
denotes |
1) age ≥ 18 years old; 2) intubation and intensive care unit (ICU) admission; 3) serious and/or life-threatening COVID-19 (please, refer to the full protocol, Additional file 1). |
| T13 |
1012-1215 |
Sentence |
denotes |
SARS-CoV-2 infection is confirmed by Real-Time-Polymerase-Chain-Reaction (RT-PCR) assays using QuantiNova Probe RT-PCR kit (Qiagen) in a Light-Cycler 480 real-time PCR system (Roche, Basel, Switzerland). |
| T14 |
1216-1239 |
Sentence |
denotes |
Exclusion criteria are: |
| T15 |
1240-1515 |
Sentence |
denotes |
1) previous allergic reaction to plasma exchange or its ingredients (i.e., sodium citrate), 2) two consecutive negative RT-PCR tests for SARS-CoV-2 at least 24 hours apart, 3) mild COVID-19 not requiring ICU admission and 4) terminally ill patients receiving palliative care. |
| T16 |
1516-1610 |
Sentence |
denotes |
The primary site will be King Saud Medical City (KSMC), Riyadh, Kingdom of Saudi Arabia (KSA). |
| T17 |
1611-1764 |
Sentence |
denotes |
Also, the study will run in ICUs (Ministry of Health Cluster 1; Riyadh) and other centers in KSA pending their institutional review board (IRB) approval. |
| T18 |
1765-1793 |
Sentence |
denotes |
Interventions and comparator |
| T19 |
1794-1871 |
Sentence |
denotes |
The intervention group will receive TPE, plus empiric treatment for COVID-19. |
| T20 |
1872-2011 |
Sentence |
denotes |
TPE is administered using the Spectra Optia TM Apheresis System equipped with the Depuro D2000 Adsorption Cartridge (Terumo BCT Inc., USA). |
| T21 |
2012-2142 |
Sentence |
denotes |
The first dose is 1.5 plasma volumes, followed by one plasma volume on alternate days or daily for five to seven total treatments. |
| T22 |
2143-2306 |
Sentence |
denotes |
Spectra Optia TM Apheresis System operates with acid-citrate dextrose anticoagulant (ACDA) as per Kidney Disease Improving Global Outcomes (KDIGO) 2019 guidelines. |
| T23 |
2307-2535 |
Sentence |
denotes |
Plasma is replaced with albumin 5% or fresh frozen plasma in patients with coagulopathy (prothrombin time >37 seconds; international normalized ratio >3; activated partial thromboplastin time >100 or fibrinogen level <100 mg/d). |
| T24 |
2536-2623 |
Sentence |
denotes |
TPE sessions are performed daily over four hours and laboratory markers measured daily. |
| T25 |
2624-2777 |
Sentence |
denotes |
The comparators are controls not receiving TPE but usual empiric treatment for COVID-19 as per institutional, national and international recommendations. |
| T26 |
2778-2832 |
Sentence |
denotes |
Both groups will receive standard ICU supportive care. |
| T27 |
2833-2846 |
Sentence |
denotes |
Main outcomes |
| T28 |
2847-2953 |
Sentence |
denotes |
Primary study end-point is 28-day mortality and safety of TPE in serious and/or life-threatening COVID-19. |
| T29 |
2954-3162 |
Sentence |
denotes |
Safety will be evaluated by the documentation of any pertinent adverse and/or serious adverse effects related to TPE as per institutional, national and international (Food and Drug Administration) guidelines. |
| T30 |
3163-3440 |
Sentence |
denotes |
Secondary outcomes are: i) improvement in Sequential Organ Function Assessment (SOFA) score ; ii) changes in inflammatory markers: serum C-reactive protein, lactate dehydrogenase, ferritin, d-dimers and interleukin-6; iii) days on mechanical ventilation and ICU length of stay. |
| T31 |
3441-3454 |
Sentence |
denotes |
Randomization |
| T32 |
3455-3603 |
Sentence |
denotes |
Eligible consented patients are randomized (1:1 allocation) after stratification by ICU center and two PaO2/FIO2 ratio categories (> 150 and ≤ 150). |
| T33 |
3604-3675 |
Sentence |
denotes |
Randomization occurs in variable block sizes of four to eight patients. |
| T34 |
3676-3827 |
Sentence |
denotes |
A web-based randomization service, randomize.net, is used to allocate patients to their respective strata prior to the intervention or control therapy. |
| T35 |
3828-3846 |
Sentence |
denotes |
Blinding (masking) |
| T36 |
3847-3973 |
Sentence |
denotes |
Given the visibility of TPE machinery, the intervention will be unblinded; hence, no enrollment concealment will be expedited. |
| T37 |
3974-4103 |
Sentence |
denotes |
The lack of allocation concealment will be mitigated by several measures (please, refer to the full protocol, Additional file 1). |
| T38 |
4104-4142 |
Sentence |
denotes |
Numbers to be randomized (sample size) |
| T39 |
4143-4266 |
Sentence |
denotes |
This pilot randomized trial aims to recruit a convenience sample of patients with serious and/or life-threatening COVID-19. |
| T40 |
4267-4359 |
Sentence |
denotes |
Therefore, at least 20 patients are to be randomized to each group per participating center. |
| T41 |
4360-4502 |
Sentence |
denotes |
We are hoping to consent and randomize approximately 60 patients in each group over a 3 to 6 months period giving a total of 120 participants. |
| T42 |
4503-4515 |
Sentence |
denotes |
Trial Status |
| T43 |
4516-4563 |
Sentence |
denotes |
The protocol version 1 was approved 29/04/2020. |
| T44 |
4564-4612 |
Sentence |
denotes |
Recruitment is ongoing, and began on 01/05/2020. |
| T45 |
4613-4650 |
Sentence |
denotes |
We estimate completion by 29/10/2020. |
| T46 |
4651-4669 |
Sentence |
denotes |
Trial registration |
| T47 |
4670-4751 |
Sentence |
denotes |
Registered at ISRCTN on 18/05/2020 (ISRCTN21363594; doi.10.1186/ ISRCTN21363594). |
| T48 |
4752-4765 |
Sentence |
denotes |
Full protocol |
| T49 |
4766-4874 |
Sentence |
denotes |
The full protocol is attached as an additional file, accessible from the Trials website (Additional file 1). |
| T50 |
4875-5055 |
Sentence |
denotes |
In the interest of expediting dissemination of this material, the familiar formatting has been eliminated; this letter serves as a summary of the key elements of the full protocol. |